]>
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 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
2e528b49 | 23 | * Copyright (c) 2013 by Delphix. All rights reserved. |
34dc7c2f BB |
24 | */ |
25 | ||
34dc7c2f BB |
26 | #include <sys/zfs_context.h> |
27 | #include <sys/spa.h> | |
5853fe79 | 28 | #include <sys/spa_impl.h> |
34dc7c2f BB |
29 | #include <sys/vdev_file.h> |
30 | #include <sys/vdev_impl.h> | |
31 | #include <sys/zio.h> | |
32 | #include <sys/fs/zfs.h> | |
b128c09f | 33 | #include <sys/fm/fs/zfs.h> |
34dc7c2f BB |
34 | |
35 | /* | |
36 | * Virtual device vector for files. | |
37 | */ | |
38 | ||
428870ff BB |
39 | static void |
40 | vdev_file_hold(vdev_t *vd) | |
41 | { | |
42 | ASSERT(vd->vdev_path != NULL); | |
43 | } | |
44 | ||
45 | static void | |
46 | vdev_file_rele(vdev_t *vd) | |
47 | { | |
48 | ASSERT(vd->vdev_path != NULL); | |
49 | } | |
50 | ||
34dc7c2f | 51 | static int |
1bd201e7 CS |
52 | vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize, |
53 | uint64_t *ashift) | |
34dc7c2f BB |
54 | { |
55 | vdev_file_t *vf; | |
56 | vnode_t *vp; | |
b128c09f | 57 | vattr_t vattr; |
34dc7c2f BB |
58 | int error; |
59 | ||
60 | /* | |
61 | * We must have a pathname, and it must be absolute. | |
62 | */ | |
63 | if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') { | |
64 | vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL; | |
2e528b49 | 65 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
66 | } |
67 | ||
428870ff BB |
68 | /* |
69 | * Reopen the device if it's not currently open. Otherwise, | |
70 | * just update the physical size of the device. | |
71 | */ | |
72 | if (vd->vdev_tsd != NULL) { | |
73 | ASSERT(vd->vdev_reopening); | |
74 | vf = vd->vdev_tsd; | |
75 | goto skip_open; | |
76 | } | |
77 | ||
b8d06fca | 78 | vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_PUSHPAGE); |
34dc7c2f BB |
79 | |
80 | /* | |
81 | * We always open the files from the root of the global zone, even if | |
82 | * we're in a local zone. If the user has gotten to this point, the | |
83 | * administrator has already decided that the pool should be available | |
84 | * to local zone users, so the underlying devices should be as well. | |
85 | */ | |
86 | ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/'); | |
87 | error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE, | |
fb5f0bc8 | 88 | spa_mode(vd->vdev_spa) | FOFFMAX, 0, &vp, 0, 0, rootdir, -1); |
34dc7c2f BB |
89 | |
90 | if (error) { | |
91 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
92 | return (error); | |
93 | } | |
94 | ||
95 | vf->vf_vnode = vp; | |
96 | ||
97 | #ifdef _KERNEL | |
98 | /* | |
99 | * Make sure it's a regular file. | |
100 | */ | |
101 | if (vp->v_type != VREG) { | |
102 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
2e528b49 | 103 | return (SET_ERROR(ENODEV)); |
34dc7c2f BB |
104 | } |
105 | #endif | |
428870ff BB |
106 | |
107 | skip_open: | |
34dc7c2f BB |
108 | /* |
109 | * Determine the physical size of the file. | |
110 | */ | |
111 | vattr.va_mask = AT_SIZE; | |
112 | error = VOP_GETATTR(vf->vf_vnode, &vattr, 0, kcred, NULL); | |
113 | if (error) { | |
114 | vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; | |
115 | return (error); | |
116 | } | |
117 | ||
1bd201e7 | 118 | *max_psize = *psize = vattr.va_size; |
34dc7c2f BB |
119 | *ashift = SPA_MINBLOCKSHIFT; |
120 | ||
121 | return (0); | |
122 | } | |
123 | ||
124 | static void | |
125 | vdev_file_close(vdev_t *vd) | |
126 | { | |
127 | vdev_file_t *vf = vd->vdev_tsd; | |
128 | ||
428870ff | 129 | if (vd->vdev_reopening || vf == NULL) |
34dc7c2f BB |
130 | return; |
131 | ||
132 | if (vf->vf_vnode != NULL) { | |
133 | (void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred, NULL); | |
fb5f0bc8 BB |
134 | (void) VOP_CLOSE(vf->vf_vnode, spa_mode(vd->vdev_spa), 1, 0, |
135 | kcred, NULL); | |
34dc7c2f BB |
136 | } |
137 | ||
428870ff | 138 | vd->vdev_delayed_close = B_FALSE; |
34dc7c2f BB |
139 | kmem_free(vf, sizeof (vdev_file_t)); |
140 | vd->vdev_tsd = NULL; | |
141 | } | |
142 | ||
5853fe79 GW |
143 | static void |
144 | vdev_file_io_strategy(void *arg) | |
34dc7c2f | 145 | { |
5853fe79 | 146 | zio_t *zio = (zio_t *)arg; |
34dc7c2f | 147 | vdev_t *vd = zio->io_vd; |
5853fe79 GW |
148 | vdev_file_t *vf = vd->vdev_tsd; |
149 | ssize_t resid; | |
34dc7c2f | 150 | |
5853fe79 GW |
151 | zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ? |
152 | UIO_READ : UIO_WRITE, vf->vf_vnode, zio->io_data, | |
153 | zio->io_size, zio->io_offset, UIO_SYSSPACE, | |
154 | 0, RLIM64_INFINITY, kcred, &resid); | |
155 | ||
156 | if (resid != 0 && zio->io_error == 0) | |
2e528b49 | 157 | zio->io_error = SET_ERROR(ENOSPC); |
3adfc400 | 158 | |
5853fe79 GW |
159 | zio_interrupt(zio); |
160 | } | |
161 | ||
162 | static int | |
163 | vdev_file_io_start(zio_t *zio) | |
164 | { | |
5853fe79 GW |
165 | vdev_t *vd = zio->io_vd; |
166 | vdev_file_t *vf = vd->vdev_tsd; | |
34dc7c2f | 167 | |
3adfc400 | 168 | if (zio->io_type == ZIO_TYPE_IOCTL) { |
5853fe79 GW |
169 | /* XXPOLICY */ |
170 | if (!vdev_readable(vd)) { | |
2e528b49 | 171 | zio->io_error = SET_ERROR(ENXIO); |
5853fe79 GW |
172 | return (ZIO_PIPELINE_CONTINUE); |
173 | } | |
174 | ||
34dc7c2f BB |
175 | switch (zio->io_cmd) { |
176 | case DKIOCFLUSHWRITECACHE: | |
177 | zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC, | |
178 | kcred, NULL); | |
34dc7c2f BB |
179 | break; |
180 | default: | |
2e528b49 | 181 | zio->io_error = SET_ERROR(ENOTSUP); |
34dc7c2f BB |
182 | } |
183 | ||
184 | return (ZIO_PIPELINE_CONTINUE); | |
185 | } | |
186 | ||
621dd7bb GW |
187 | VERIFY3U(taskq_dispatch(system_taskq, vdev_file_io_strategy, zio, |
188 | TQ_SLEEP), !=, 0); | |
34dc7c2f BB |
189 | |
190 | return (ZIO_PIPELINE_STOP); | |
191 | } | |
192 | ||
b128c09f BB |
193 | /* ARGSUSED */ |
194 | static void | |
34dc7c2f BB |
195 | vdev_file_io_done(zio_t *zio) |
196 | { | |
34dc7c2f BB |
197 | } |
198 | ||
199 | vdev_ops_t vdev_file_ops = { | |
200 | vdev_file_open, | |
201 | vdev_file_close, | |
34dc7c2f BB |
202 | vdev_default_asize, |
203 | vdev_file_io_start, | |
204 | vdev_file_io_done, | |
205 | NULL, | |
428870ff BB |
206 | vdev_file_hold, |
207 | vdev_file_rele, | |
34dc7c2f BB |
208 | VDEV_TYPE_FILE, /* name of this vdev type */ |
209 | B_TRUE /* leaf vdev */ | |
210 | }; | |
211 | ||
212 | /* | |
213 | * From userland we access disks just like files. | |
214 | */ | |
215 | #ifndef _KERNEL | |
216 | ||
217 | vdev_ops_t vdev_disk_ops = { | |
218 | vdev_file_open, | |
219 | vdev_file_close, | |
34dc7c2f BB |
220 | vdev_default_asize, |
221 | vdev_file_io_start, | |
222 | vdev_file_io_done, | |
223 | NULL, | |
428870ff BB |
224 | vdev_file_hold, |
225 | vdev_file_rele, | |
34dc7c2f BB |
226 | VDEV_TYPE_DISK, /* name of this vdev type */ |
227 | B_TRUE /* leaf vdev */ | |
228 | }; | |
229 | ||
230 | #endif |