]>
Commit | Line | Data |
---|---|---|
34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
b128c09f | 22 | * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
25 | ||
34dc7c2f BB |
26 | #include <sys/zfs_context.h> |
27 | #include <sys/spa.h> | |
28 | #include <sys/vdev_file.h> | |
29 | #include <sys/vdev_impl.h> | |
30 | #include <sys/zio.h> | |
31 | #include <sys/fs/zfs.h> | |
b128c09f | 32 | #include <sys/fm/fs/zfs.h> |
34dc7c2f BB |
33 | |
34 | /* | |
35 | * Virtual device vector for files. | |
36 | */ | |
37 | ||
38 | static int | |
b128c09f | 39 | vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift) |
34dc7c2f BB |
40 | { |
41 | vdev_file_t *vf; | |
42 | vnode_t *vp; | |
b128c09f | 43 | vattr_t vattr; |
34dc7c2f BB |
44 | int error; |
45 | ||
46 | /* | |
47 | * We must have a pathname, and it must be absolute. | |
48 | */ | |
49 | if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') { | |
50 | vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL; | |
51 | return (EINVAL); | |
52 | } | |
53 | ||
54 | vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP); | |
55 | ||
56 | /* | |
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. | |
61 | */ | |
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); | |
65 | ||
66 | if (error) { | |
67 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
68 | return (error); | |
69 | } | |
70 | ||
71 | vf->vf_vnode = vp; | |
72 | ||
73 | #ifdef _KERNEL | |
74 | /* | |
75 | * Make sure it's a regular file. | |
76 | */ | |
77 | if (vp->v_type != VREG) { | |
78 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
79 | return (ENODEV); | |
80 | } | |
81 | #endif | |
34dc7c2f BB |
82 | /* |
83 | * Determine the physical size of the file. | |
84 | */ | |
85 | vattr.va_mask = AT_SIZE; | |
86 | error = VOP_GETATTR(vf->vf_vnode, &vattr, 0, kcred, NULL); | |
87 | if (error) { | |
88 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
89 | return (error); | |
90 | } | |
91 | ||
92 | *psize = vattr.va_size; | |
93 | *ashift = SPA_MINBLOCKSHIFT; | |
94 | ||
95 | return (0); | |
96 | } | |
97 | ||
98 | static void | |
99 | vdev_file_close(vdev_t *vd) | |
100 | { | |
101 | vdev_file_t *vf = vd->vdev_tsd; | |
102 | ||
103 | if (vf == NULL) | |
104 | return; | |
105 | ||
106 | if (vf->vf_vnode != NULL) { | |
107 | (void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred, NULL); | |
108 | (void) VOP_CLOSE(vf->vf_vnode, spa_mode, 1, 0, kcred, NULL); | |
109 | VN_RELE(vf->vf_vnode); | |
110 | } | |
111 | ||
112 | kmem_free(vf, sizeof (vdev_file_t)); | |
113 | vd->vdev_tsd = NULL; | |
114 | } | |
115 | ||
34dc7c2f BB |
116 | static int |
117 | vdev_file_io_start(zio_t *zio) | |
118 | { | |
119 | vdev_t *vd = zio->io_vd; | |
120 | vdev_file_t *vf = vd->vdev_tsd; | |
121 | ssize_t resid; | |
34dc7c2f BB |
122 | |
123 | if (zio->io_type == ZIO_TYPE_IOCTL) { | |
34dc7c2f BB |
124 | /* XXPOLICY */ |
125 | if (!vdev_readable(vd)) { | |
126 | zio->io_error = ENXIO; | |
127 | return (ZIO_PIPELINE_CONTINUE); | |
128 | } | |
129 | ||
130 | switch (zio->io_cmd) { | |
131 | case DKIOCFLUSHWRITECACHE: | |
132 | zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC, | |
133 | kcred, NULL); | |
34dc7c2f BB |
134 | break; |
135 | default: | |
136 | zio->io_error = ENOTSUP; | |
137 | } | |
138 | ||
139 | return (ZIO_PIPELINE_CONTINUE); | |
140 | } | |
141 | ||
34dc7c2f BB |
142 | zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ? |
143 | UIO_READ : UIO_WRITE, vf->vf_vnode, zio->io_data, | |
144 | zio->io_size, zio->io_offset, UIO_SYSSPACE, | |
145 | 0, RLIM64_INFINITY, kcred, &resid); | |
146 | ||
147 | if (resid != 0 && zio->io_error == 0) | |
148 | zio->io_error = ENOSPC; | |
149 | ||
150 | zio_interrupt(zio); | |
151 | ||
152 | return (ZIO_PIPELINE_STOP); | |
153 | } | |
154 | ||
b128c09f BB |
155 | /* ARGSUSED */ |
156 | static void | |
34dc7c2f BB |
157 | vdev_file_io_done(zio_t *zio) |
158 | { | |
34dc7c2f BB |
159 | } |
160 | ||
161 | vdev_ops_t vdev_file_ops = { | |
162 | vdev_file_open, | |
163 | vdev_file_close, | |
34dc7c2f BB |
164 | vdev_default_asize, |
165 | vdev_file_io_start, | |
166 | vdev_file_io_done, | |
167 | NULL, | |
168 | VDEV_TYPE_FILE, /* name of this vdev type */ | |
169 | B_TRUE /* leaf vdev */ | |
170 | }; | |
171 | ||
172 | /* | |
173 | * From userland we access disks just like files. | |
174 | */ | |
175 | #ifndef _KERNEL | |
176 | ||
177 | vdev_ops_t vdev_disk_ops = { | |
178 | vdev_file_open, | |
179 | vdev_file_close, | |
34dc7c2f BB |
180 | vdev_default_asize, |
181 | vdev_file_io_start, | |
182 | vdev_file_io_done, | |
183 | NULL, | |
184 | VDEV_TYPE_DISK, /* name of this vdev type */ | |
185 | B_TRUE /* leaf vdev */ | |
186 | }; | |
187 | ||
188 | #endif |