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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #include <sys/zfs_context.h>
28 #include <sys/vdev_file.h>
29 #include <sys/vdev_impl.h>
31 #include <sys/fs/zfs.h>
32 #include <sys/fm/fs/zfs.h>
35 * Virtual device vector for files.
39 vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
47 * We must have a pathname, and it must be absolute.
49 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
50 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
54 vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
57 * We always open the files from the root of the global zone, even if
58 * we're in a local zone. If the user has gotten to this point, the
59 * administrator has already decided that the pool should be available
60 * to local zone users, so the underlying devices should be as well.
62 ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/');
63 error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE,
64 spa_mode | FOFFMAX, 0, &vp, 0, 0, rootdir, -1);
67 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
75 * Make sure it's a regular file.
77 if (vp->v_type != VREG) {
78 (void) VOP_CLOSE(vp, spa_mode, 1, 0, kcred, NULL);
79 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
84 * Determine the physical size of the file.
86 vattr.va_mask = AT_SIZE;
87 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
88 vn_lock(vp, LK_SHARED | LK_RETRY);
89 error = VOP_GETATTR(vp, &vattr, kcred);
91 VFS_UNLOCK_GIANT(vfslocked);
93 (void) VOP_CLOSE(vp, spa_mode, 1, 0, kcred, NULL);
94 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
98 *psize = vattr.va_size;
99 *ashift = SPA_MINBLOCKSHIFT;
105 vdev_file_close(vdev_t *vd)
107 vdev_file_t *vf = vd->vdev_tsd;
112 if (vf->vf_vnode != NULL)
113 (void) VOP_CLOSE(vf->vf_vnode, spa_mode, 1, 0, kcred, NULL);
114 kmem_free(vf, sizeof (vdev_file_t));
119 vdev_file_io_start(zio_t *zio)
121 vdev_t *vd = zio->io_vd;
122 vdev_file_t *vf = vd->vdev_tsd;
123 vnode_t *vp = vf->vf_vnode;
126 if (zio->io_type == ZIO_TYPE_IOCTL) {
128 if (!vdev_readable(vd)) {
129 zio->io_error = ENXIO;
130 return (ZIO_PIPELINE_CONTINUE);
133 switch (zio->io_cmd) {
134 case DKIOCFLUSHWRITECACHE:
135 zio->io_error = VOP_FSYNC(vp, FSYNC | FDSYNC,
139 zio->io_error = ENOTSUP;
142 return (ZIO_PIPELINE_CONTINUE);
145 zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ?
146 UIO_READ : UIO_WRITE, vp, zio->io_data, zio->io_size,
147 zio->io_offset, UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid);
149 if (resid != 0 && zio->io_error == 0)
150 zio->io_error = ENOSPC;
154 return (ZIO_PIPELINE_STOP);
159 vdev_file_io_done(zio_t *zio)
163 vdev_ops_t vdev_file_ops = {
170 VDEV_TYPE_FILE, /* name of this vdev type */
171 B_TRUE /* leaf vdev */
175 * From userland we access disks just like files.
179 vdev_ops_t vdev_disk_ops = {
186 VDEV_TYPE_DISK, /* name of this vdev type */
187 B_TRUE /* leaf vdev */