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);
76 vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
79 * We always open the files from the root of the global zone, even if
80 * we're in a local zone. If the user has gotten to this point, the
81 * administrator has already decided that the pool should be available
82 * to local zone users, so the underlying devices should be as well.
84 ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/');
85 error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE,
86 spa_mode(vd->vdev_spa) | FOFFMAX, 0, &vp, 0, 0, rootdir, -1);
89 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
90 kmem_free(vd->vdev_tsd, sizeof (vdev_file_t));
99 * Make sure it's a regular file.
101 if (vp->v_type != VREG) {
102 (void) VOP_CLOSE(vp, spa_mode(vd->vdev_spa), 1, 0, kcred, NULL);
103 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
104 kmem_free(vd->vdev_tsd, sizeof (vdev_file_t));
112 * Determine the physical size of the file.
114 vattr.va_mask = AT_SIZE;
115 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
116 vn_lock(vp, LK_SHARED | LK_RETRY);
117 error = VOP_GETATTR(vp, &vattr, kcred);
119 VFS_UNLOCK_GIANT(vfslocked);
121 (void) VOP_CLOSE(vp, spa_mode(vd->vdev_spa), 1, 0, kcred, NULL);
122 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
123 kmem_free(vd->vdev_tsd, sizeof (vdev_file_t));
128 *psize = vattr.va_size;
129 *ashift = SPA_MINBLOCKSHIFT;
135 vdev_file_close(vdev_t *vd)
137 vdev_file_t *vf = vd->vdev_tsd;
139 if (vd->vdev_reopening || vf == NULL)
142 if (vf->vf_vnode != NULL) {
143 (void) VOP_CLOSE(vf->vf_vnode, spa_mode(vd->vdev_spa), 1, 0,
147 vd->vdev_delayed_close = B_FALSE;
148 kmem_free(vf, sizeof (vdev_file_t));
153 vdev_file_io_start(zio_t *zio)
155 vdev_t *vd = zio->io_vd;
156 vdev_file_t *vf = vd->vdev_tsd;
157 vnode_t *vp = vf->vf_vnode;
160 if (zio->io_type == ZIO_TYPE_IOCTL) {
162 if (!vdev_readable(vd)) {
163 zio->io_error = ENXIO;
164 return (ZIO_PIPELINE_CONTINUE);
167 switch (zio->io_cmd) {
168 case DKIOCFLUSHWRITECACHE:
169 zio->io_error = VOP_FSYNC(vp, FSYNC | FDSYNC,
173 zio->io_error = ENOTSUP;
176 return (ZIO_PIPELINE_CONTINUE);
179 zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ?
180 UIO_READ : UIO_WRITE, vp, zio->io_data, zio->io_size,
181 zio->io_offset, UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid);
183 if (resid != 0 && zio->io_error == 0)
184 zio->io_error = ENOSPC;
188 return (ZIO_PIPELINE_STOP);
193 vdev_file_io_done(zio_t *zio)
197 vdev_ops_t vdev_file_ops = {
206 VDEV_TYPE_FILE, /* name of this vdev type */
207 B_TRUE /* leaf vdev */
211 * From userland we access disks just like files.
215 vdev_ops_t vdev_disk_ops = {
224 VDEV_TYPE_DISK, /* name of this vdev type */
225 B_TRUE /* leaf vdev */