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/*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
| 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/*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
| 23 * Copyright (c) 2012 by Delphix. All rights reserved.
|
23 */
24
25#include <sys/zfs_context.h>
26#include <sys/spa_impl.h>
27#include <sys/refcount.h>
28#include <sys/vdev_disk.h>
29#include <sys/vdev_impl.h>
30#include <sys/fs/zfs.h>
31#include <sys/zio.h>
32#include <sys/sunldi.h>
| 24 */
25
26#include <sys/zfs_context.h>
27#include <sys/spa_impl.h>
28#include <sys/refcount.h>
29#include <sys/vdev_disk.h>
30#include <sys/vdev_impl.h>
31#include <sys/fs/zfs.h>
32#include <sys/zio.h>
33#include <sys/sunldi.h>
|
| 34#include <sys/efi_partition.h>
|
33#include <sys/fm/fs/zfs.h>
34
35/*
36 * Virtual device vector for disks.
37 */
38
39extern ldi_ident_t zfs_li;
40
41typedef struct vdev_disk_buf {
42 buf_t vdb_buf;
43 zio_t *vdb_io;
44} vdev_disk_buf_t;
45
46static void
47vdev_disk_hold(vdev_t *vd)
48{
49 ddi_devid_t devid;
50 char *minor;
51
52 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
53
54 /*
55 * We must have a pathname, and it must be absolute.
56 */
57 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
58 return;
59
60 /*
61 * Only prefetch path and devid info if the device has
62 * never been opened.
63 */
64 if (vd->vdev_tsd != NULL)
65 return;
66
67 if (vd->vdev_wholedisk == -1ULL) {
68 size_t len = strlen(vd->vdev_path) + 3;
69 char *buf = kmem_alloc(len, KM_SLEEP);
70
71 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
72
73 (void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
74 kmem_free(buf, len);
75 }
76
77 if (vd->vdev_name_vp == NULL)
78 (void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
79
80 if (vd->vdev_devid != NULL &&
81 ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
82 (void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
83 ddi_devid_str_free(minor);
84 ddi_devid_free(devid);
85 }
86}
87
88static void
89vdev_disk_rele(vdev_t *vd)
90{
91 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
92
93 if (vd->vdev_name_vp) {
94 VN_RELE_ASYNC(vd->vdev_name_vp,
95 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
96 vd->vdev_name_vp = NULL;
97 }
98 if (vd->vdev_devid_vp) {
99 VN_RELE_ASYNC(vd->vdev_devid_vp,
100 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
101 vd->vdev_devid_vp = NULL;
102 }
103}
104
| 35#include <sys/fm/fs/zfs.h>
36
37/*
38 * Virtual device vector for disks.
39 */
40
41extern ldi_ident_t zfs_li;
42
43typedef struct vdev_disk_buf {
44 buf_t vdb_buf;
45 zio_t *vdb_io;
46} vdev_disk_buf_t;
47
48static void
49vdev_disk_hold(vdev_t *vd)
50{
51 ddi_devid_t devid;
52 char *minor;
53
54 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
55
56 /*
57 * We must have a pathname, and it must be absolute.
58 */
59 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
60 return;
61
62 /*
63 * Only prefetch path and devid info if the device has
64 * never been opened.
65 */
66 if (vd->vdev_tsd != NULL)
67 return;
68
69 if (vd->vdev_wholedisk == -1ULL) {
70 size_t len = strlen(vd->vdev_path) + 3;
71 char *buf = kmem_alloc(len, KM_SLEEP);
72
73 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
74
75 (void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
76 kmem_free(buf, len);
77 }
78
79 if (vd->vdev_name_vp == NULL)
80 (void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
81
82 if (vd->vdev_devid != NULL &&
83 ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
84 (void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
85 ddi_devid_str_free(minor);
86 ddi_devid_free(devid);
87 }
88}
89
90static void
91vdev_disk_rele(vdev_t *vd)
92{
93 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
94
95 if (vd->vdev_name_vp) {
96 VN_RELE_ASYNC(vd->vdev_name_vp,
97 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
98 vd->vdev_name_vp = NULL;
99 }
100 if (vd->vdev_devid_vp) {
101 VN_RELE_ASYNC(vd->vdev_devid_vp,
102 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
103 vd->vdev_devid_vp = NULL;
104 }
105}
106
|
| 107static uint64_t
108vdev_disk_get_space(vdev_t *vd, uint64_t capacity, uint_t blksz)
109{
110 ASSERT(vd->vdev_wholedisk);
111
112 vdev_disk_t *dvd = vd->vdev_tsd;
113 dk_efi_t dk_ioc;
114 efi_gpt_t *efi;
115 uint64_t avail_space = 0;
116 int efisize = EFI_LABEL_SIZE * 2;
117
118 dk_ioc.dki_data = kmem_alloc(efisize, KM_SLEEP);
119 dk_ioc.dki_lba = 1;
120 dk_ioc.dki_length = efisize;
121 dk_ioc.dki_data_64 = (uint64_t)(uintptr_t)dk_ioc.dki_data;
122 efi = dk_ioc.dki_data;
123
124 if (ldi_ioctl(dvd->vd_lh, DKIOCGETEFI, (intptr_t)&dk_ioc,
125 FKIOCTL, kcred, NULL) == 0) {
126 uint64_t efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
127
128 zfs_dbgmsg("vdev %s, capacity %llu, altern lba %llu",
129 vd->vdev_path, capacity, efi_altern_lba);
130 if (capacity > efi_altern_lba)
131 avail_space = (capacity - efi_altern_lba) * blksz;
132 }
133 kmem_free(dk_ioc.dki_data, efisize);
134 return (avail_space);
135}
136
|
105static int
| 137static int
|
106vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
| 138vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
139 uint64_t *ashift)
|
107{
108 spa_t *spa = vd->vdev_spa;
109 vdev_disk_t *dvd;
110 struct dk_minfo_ext dkmext;
111 int error;
112 dev_t dev;
113 int otyp;
114
115 /*
116 * We must have a pathname, and it must be absolute.
117 */
118 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
119 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
120 return (EINVAL);
121 }
122
123 /*
124 * Reopen the device if it's not currently open. Otherwise,
125 * just update the physical size of the device.
126 */
127 if (vd->vdev_tsd != NULL) {
128 ASSERT(vd->vdev_reopening);
129 dvd = vd->vdev_tsd;
130 goto skip_open;
131 }
132
133 dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
134
135 /*
136 * When opening a disk device, we want to preserve the user's original
137 * intent. We always want to open the device by the path the user gave
138 * us, even if it is one of multiple paths to the save device. But we
139 * also want to be able to survive disks being removed/recabled.
140 * Therefore the sequence of opening devices is:
141 *
142 * 1. Try opening the device by path. For legacy pools without the
143 * 'whole_disk' property, attempt to fix the path by appending 's0'.
144 *
145 * 2. If the devid of the device matches the stored value, return
146 * success.
147 *
148 * 3. Otherwise, the device may have moved. Try opening the device
149 * by the devid instead.
150 */
151 if (vd->vdev_devid != NULL) {
152 if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
153 &dvd->vd_minor) != 0) {
154 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
155 return (EINVAL);
156 }
157 }
158
159 error = EINVAL; /* presume failure */
160
161 if (vd->vdev_path != NULL) {
162 ddi_devid_t devid;
163
164 if (vd->vdev_wholedisk == -1ULL) {
165 size_t len = strlen(vd->vdev_path) + 3;
166 char *buf = kmem_alloc(len, KM_SLEEP);
167 ldi_handle_t lh;
168
169 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
170
171 if (ldi_open_by_name(buf, spa_mode(spa), kcred,
172 &lh, zfs_li) == 0) {
173 spa_strfree(vd->vdev_path);
174 vd->vdev_path = buf;
175 vd->vdev_wholedisk = 1ULL;
176 (void) ldi_close(lh, spa_mode(spa), kcred);
177 } else {
178 kmem_free(buf, len);
179 }
180 }
181
182 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
183 &dvd->vd_lh, zfs_li);
184
185 /*
186 * Compare the devid to the stored value.
187 */
188 if (error == 0 && vd->vdev_devid != NULL &&
189 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
190 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
191 error = EINVAL;
192 (void) ldi_close(dvd->vd_lh, spa_mode(spa),
193 kcred);
194 dvd->vd_lh = NULL;
195 }
196 ddi_devid_free(devid);
197 }
198
199 /*
200 * If we succeeded in opening the device, but 'vdev_wholedisk'
201 * is not yet set, then this must be a slice.
202 */
203 if (error == 0 && vd->vdev_wholedisk == -1ULL)
204 vd->vdev_wholedisk = 0;
205 }
206
207 /*
208 * If we were unable to open by path, or the devid check fails, open by
209 * devid instead.
210 */
211 if (error != 0 && vd->vdev_devid != NULL)
212 error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
213 spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
214
215 /*
216 * If all else fails, then try opening by physical path (if available)
217 * or the logical path (if we failed due to the devid check). While not
218 * as reliable as the devid, this will give us something, and the higher
219 * level vdev validation will prevent us from opening the wrong device.
220 */
221 if (error) {
222 if (vd->vdev_physpath != NULL &&
223 (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
224 error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
225 kcred, &dvd->vd_lh, zfs_li);
226
227 /*
228 * Note that we don't support the legacy auto-wholedisk support
229 * as above. This hasn't been used in a very long time and we
230 * don't need to propagate its oddities to this edge condition.
231 */
232 if (error && vd->vdev_path != NULL)
233 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
234 kcred, &dvd->vd_lh, zfs_li);
235 }
236
237 if (error) {
238 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
239 return (error);
240 }
241
242 /*
243 * Once a device is opened, verify that the physical device path (if
244 * available) is up to date.
245 */
246 if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
247 ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
248 char *physpath, *minorname;
249
250 physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
251 minorname = NULL;
252 if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
253 ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
254 (vd->vdev_physpath == NULL ||
255 strcmp(vd->vdev_physpath, physpath) != 0)) {
256 if (vd->vdev_physpath)
257 spa_strfree(vd->vdev_physpath);
258 (void) strlcat(physpath, ":", MAXPATHLEN);
259 (void) strlcat(physpath, minorname, MAXPATHLEN);
260 vd->vdev_physpath = spa_strdup(physpath);
261 }
262 if (minorname)
263 kmem_free(minorname, strlen(minorname) + 1);
264 kmem_free(physpath, MAXPATHLEN);
265 }
266
267skip_open:
268 /*
269 * Determine the actual size of the device.
270 */
271 if (ldi_get_size(dvd->vd_lh, psize) != 0) {
272 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
273 return (EINVAL);
274 }
275
276 /*
| 140{
141 spa_t *spa = vd->vdev_spa;
142 vdev_disk_t *dvd;
143 struct dk_minfo_ext dkmext;
144 int error;
145 dev_t dev;
146 int otyp;
147
148 /*
149 * We must have a pathname, and it must be absolute.
150 */
151 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
152 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
153 return (EINVAL);
154 }
155
156 /*
157 * Reopen the device if it's not currently open. Otherwise,
158 * just update the physical size of the device.
159 */
160 if (vd->vdev_tsd != NULL) {
161 ASSERT(vd->vdev_reopening);
162 dvd = vd->vdev_tsd;
163 goto skip_open;
164 }
165
166 dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
167
168 /*
169 * When opening a disk device, we want to preserve the user's original
170 * intent. We always want to open the device by the path the user gave
171 * us, even if it is one of multiple paths to the save device. But we
172 * also want to be able to survive disks being removed/recabled.
173 * Therefore the sequence of opening devices is:
174 *
175 * 1. Try opening the device by path. For legacy pools without the
176 * 'whole_disk' property, attempt to fix the path by appending 's0'.
177 *
178 * 2. If the devid of the device matches the stored value, return
179 * success.
180 *
181 * 3. Otherwise, the device may have moved. Try opening the device
182 * by the devid instead.
183 */
184 if (vd->vdev_devid != NULL) {
185 if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
186 &dvd->vd_minor) != 0) {
187 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
188 return (EINVAL);
189 }
190 }
191
192 error = EINVAL; /* presume failure */
193
194 if (vd->vdev_path != NULL) {
195 ddi_devid_t devid;
196
197 if (vd->vdev_wholedisk == -1ULL) {
198 size_t len = strlen(vd->vdev_path) + 3;
199 char *buf = kmem_alloc(len, KM_SLEEP);
200 ldi_handle_t lh;
201
202 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
203
204 if (ldi_open_by_name(buf, spa_mode(spa), kcred,
205 &lh, zfs_li) == 0) {
206 spa_strfree(vd->vdev_path);
207 vd->vdev_path = buf;
208 vd->vdev_wholedisk = 1ULL;
209 (void) ldi_close(lh, spa_mode(spa), kcred);
210 } else {
211 kmem_free(buf, len);
212 }
213 }
214
215 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
216 &dvd->vd_lh, zfs_li);
217
218 /*
219 * Compare the devid to the stored value.
220 */
221 if (error == 0 && vd->vdev_devid != NULL &&
222 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
223 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
224 error = EINVAL;
225 (void) ldi_close(dvd->vd_lh, spa_mode(spa),
226 kcred);
227 dvd->vd_lh = NULL;
228 }
229 ddi_devid_free(devid);
230 }
231
232 /*
233 * If we succeeded in opening the device, but 'vdev_wholedisk'
234 * is not yet set, then this must be a slice.
235 */
236 if (error == 0 && vd->vdev_wholedisk == -1ULL)
237 vd->vdev_wholedisk = 0;
238 }
239
240 /*
241 * If we were unable to open by path, or the devid check fails, open by
242 * devid instead.
243 */
244 if (error != 0 && vd->vdev_devid != NULL)
245 error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
246 spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
247
248 /*
249 * If all else fails, then try opening by physical path (if available)
250 * or the logical path (if we failed due to the devid check). While not
251 * as reliable as the devid, this will give us something, and the higher
252 * level vdev validation will prevent us from opening the wrong device.
253 */
254 if (error) {
255 if (vd->vdev_physpath != NULL &&
256 (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
257 error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
258 kcred, &dvd->vd_lh, zfs_li);
259
260 /*
261 * Note that we don't support the legacy auto-wholedisk support
262 * as above. This hasn't been used in a very long time and we
263 * don't need to propagate its oddities to this edge condition.
264 */
265 if (error && vd->vdev_path != NULL)
266 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
267 kcred, &dvd->vd_lh, zfs_li);
268 }
269
270 if (error) {
271 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
272 return (error);
273 }
274
275 /*
276 * Once a device is opened, verify that the physical device path (if
277 * available) is up to date.
278 */
279 if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
280 ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
281 char *physpath, *minorname;
282
283 physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
284 minorname = NULL;
285 if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
286 ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
287 (vd->vdev_physpath == NULL ||
288 strcmp(vd->vdev_physpath, physpath) != 0)) {
289 if (vd->vdev_physpath)
290 spa_strfree(vd->vdev_physpath);
291 (void) strlcat(physpath, ":", MAXPATHLEN);
292 (void) strlcat(physpath, minorname, MAXPATHLEN);
293 vd->vdev_physpath = spa_strdup(physpath);
294 }
295 if (minorname)
296 kmem_free(minorname, strlen(minorname) + 1);
297 kmem_free(physpath, MAXPATHLEN);
298 }
299
300skip_open:
301 /*
302 * Determine the actual size of the device.
303 */
304 if (ldi_get_size(dvd->vd_lh, psize) != 0) {
305 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
306 return (EINVAL);
307 }
308
309 /*
|
277 * If we own the whole disk, try to enable disk write caching.
278 * We ignore errors because it's OK if we can't do it.
279 */
280 if (vd->vdev_wholedisk == 1) {
281 int wce = 1;
282 (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
283 FKIOCTL, kcred, NULL);
284 }
285
286 /*
| |
287 * Determine the device's minimum transfer size.
288 * If the ioctl isn't supported, assume DEV_BSIZE.
289 */
290 if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
291 FKIOCTL, kcred, NULL) != 0)
292 dkmext.dki_pbsize = DEV_BSIZE;
293
294 *ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
295
| 310 * Determine the device's minimum transfer size.
311 * If the ioctl isn't supported, assume DEV_BSIZE.
312 */
313 if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
314 FKIOCTL, kcred, NULL) != 0)
315 dkmext.dki_pbsize = DEV_BSIZE;
316
317 *ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
318
|
| 319 if (vd->vdev_wholedisk == 1) {
320 uint64_t capacity = dkmext.dki_capacity - 1;
321 uint64_t blksz = dkmext.dki_lbsize;
322 int wce = 1;
323
324 /*
325 * If we own the whole disk, try to enable disk write caching.
326 * We ignore errors because it's OK if we can't do it.
327 */
328 (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
329 FKIOCTL, kcred, NULL);
330
331 *max_psize = *psize + vdev_disk_get_space(vd, capacity, blksz);
332 zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
333 "max_psize %llu", vd->vdev_path, *psize, *max_psize);
334 } else {
335 *max_psize = *psize;
336 }
337
|
296 /*
297 * Clear the nowritecache bit, so that on a vdev_reopen() we will
298 * try again.
299 */
300 vd->vdev_nowritecache = B_FALSE;
301
302 return (0);
303}
304
305static void
306vdev_disk_close(vdev_t *vd)
307{
308 vdev_disk_t *dvd = vd->vdev_tsd;
309
310 if (vd->vdev_reopening || dvd == NULL)
311 return;
312
313 if (dvd->vd_minor != NULL)
314 ddi_devid_str_free(dvd->vd_minor);
315
316 if (dvd->vd_devid != NULL)
317 ddi_devid_free(dvd->vd_devid);
318
319 if (dvd->vd_lh != NULL)
320 (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
321
322 vd->vdev_delayed_close = B_FALSE;
323 kmem_free(dvd, sizeof (vdev_disk_t));
324 vd->vdev_tsd = NULL;
325}
326
327int
328vdev_disk_physio(ldi_handle_t vd_lh, caddr_t data, size_t size,
329 uint64_t offset, int flags)
330{
331 buf_t *bp;
332 int error = 0;
333
334 if (vd_lh == NULL)
335 return (EINVAL);
336
337 ASSERT(flags & B_READ || flags & B_WRITE);
338
339 bp = getrbuf(KM_SLEEP);
340 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
341 bp->b_bcount = size;
342 bp->b_un.b_addr = (void *)data;
343 bp->b_lblkno = lbtodb(offset);
344 bp->b_bufsize = size;
345
346 error = ldi_strategy(vd_lh, bp);
347 ASSERT(error == 0);
348 if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
349 error = EIO;
350 freerbuf(bp);
351
352 return (error);
353}
354
355static void
356vdev_disk_io_intr(buf_t *bp)
357{
358 vdev_disk_buf_t *vdb = (vdev_disk_buf_t *)bp;
359 zio_t *zio = vdb->vdb_io;
360
361 /*
362 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
363 * Rather than teach the rest of the stack about other error
364 * possibilities (EFAULT, etc), we normalize the error value here.
365 */
366 zio->io_error = (geterror(bp) != 0 ? EIO : 0);
367
368 if (zio->io_error == 0 && bp->b_resid != 0)
369 zio->io_error = EIO;
370
371 kmem_free(vdb, sizeof (vdev_disk_buf_t));
372
373 zio_interrupt(zio);
374}
375
376static void
377vdev_disk_ioctl_free(zio_t *zio)
378{
379 kmem_free(zio->io_vsd, sizeof (struct dk_callback));
380}
381
382static const zio_vsd_ops_t vdev_disk_vsd_ops = {
383 vdev_disk_ioctl_free,
384 zio_vsd_default_cksum_report
385};
386
387static void
388vdev_disk_ioctl_done(void *zio_arg, int error)
389{
390 zio_t *zio = zio_arg;
391
392 zio->io_error = error;
393
394 zio_interrupt(zio);
395}
396
397static int
398vdev_disk_io_start(zio_t *zio)
399{
400 vdev_t *vd = zio->io_vd;
401 vdev_disk_t *dvd = vd->vdev_tsd;
402 vdev_disk_buf_t *vdb;
403 struct dk_callback *dkc;
404 buf_t *bp;
405 int error;
406
407 if (zio->io_type == ZIO_TYPE_IOCTL) {
408 /* XXPOLICY */
409 if (!vdev_readable(vd)) {
410 zio->io_error = ENXIO;
411 return (ZIO_PIPELINE_CONTINUE);
412 }
413
414 switch (zio->io_cmd) {
415
416 case DKIOCFLUSHWRITECACHE:
417
418 if (zfs_nocacheflush)
419 break;
420
421 if (vd->vdev_nowritecache) {
422 zio->io_error = ENOTSUP;
423 break;
424 }
425
426 zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
427 zio->io_vsd_ops = &vdev_disk_vsd_ops;
428
429 dkc->dkc_callback = vdev_disk_ioctl_done;
430 dkc->dkc_flag = FLUSH_VOLATILE;
431 dkc->dkc_cookie = zio;
432
433 error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
434 (uintptr_t)dkc, FKIOCTL, kcred, NULL);
435
436 if (error == 0) {
437 /*
438 * The ioctl will be done asychronously,
439 * and will call vdev_disk_ioctl_done()
440 * upon completion.
441 */
442 return (ZIO_PIPELINE_STOP);
443 }
444
445 if (error == ENOTSUP || error == ENOTTY) {
446 /*
447 * If we get ENOTSUP or ENOTTY, we know that
448 * no future attempts will ever succeed.
449 * In this case we set a persistent bit so
450 * that we don't bother with the ioctl in the
451 * future.
452 */
453 vd->vdev_nowritecache = B_TRUE;
454 }
455 zio->io_error = error;
456
457 break;
458
459 default:
460 zio->io_error = ENOTSUP;
461 }
462
463 return (ZIO_PIPELINE_CONTINUE);
464 }
465
466 vdb = kmem_alloc(sizeof (vdev_disk_buf_t), KM_SLEEP);
467
468 vdb->vdb_io = zio;
469 bp = &vdb->vdb_buf;
470
471 bioinit(bp);
472 bp->b_flags = B_BUSY | B_NOCACHE |
473 (zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE);
474 if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
475 bp->b_flags |= B_FAILFAST;
476 bp->b_bcount = zio->io_size;
477 bp->b_un.b_addr = zio->io_data;
478 bp->b_lblkno = lbtodb(zio->io_offset);
479 bp->b_bufsize = zio->io_size;
480 bp->b_iodone = (int (*)())vdev_disk_io_intr;
481
482 /* ldi_strategy() will return non-zero only on programming errors */
483 VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0);
484
485 return (ZIO_PIPELINE_STOP);
486}
487
488static void
489vdev_disk_io_done(zio_t *zio)
490{
491 vdev_t *vd = zio->io_vd;
492
493 /*
494 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
495 * the device has been removed. If this is the case, then we trigger an
496 * asynchronous removal of the device. Otherwise, probe the device and
497 * make sure it's still accessible.
498 */
499 if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
500 vdev_disk_t *dvd = vd->vdev_tsd;
501 int state = DKIO_NONE;
502
503 if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
504 FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
505 /*
506 * We post the resource as soon as possible, instead of
507 * when the async removal actually happens, because the
508 * DE is using this information to discard previous I/O
509 * errors.
510 */
511 zfs_post_remove(zio->io_spa, vd);
512 vd->vdev_remove_wanted = B_TRUE;
513 spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
514 } else if (!vd->vdev_delayed_close) {
515 vd->vdev_delayed_close = B_TRUE;
516 }
517 }
518}
519
520vdev_ops_t vdev_disk_ops = {
521 vdev_disk_open,
522 vdev_disk_close,
523 vdev_default_asize,
524 vdev_disk_io_start,
525 vdev_disk_io_done,
526 NULL,
527 vdev_disk_hold,
528 vdev_disk_rele,
529 VDEV_TYPE_DISK, /* name of this vdev type */
530 B_TRUE /* leaf vdev */
531};
532
533/*
534 * Given the root disk device devid or pathname, read the label from
535 * the device, and construct a configuration nvlist.
536 */
537int
538vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
539{
540 ldi_handle_t vd_lh;
541 vdev_label_t *label;
542 uint64_t s, size;
543 int l;
544 ddi_devid_t tmpdevid;
545 int error = -1;
546 char *minor_name;
547
548 /*
549 * Read the device label and build the nvlist.
550 */
551 if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
552 &minor_name) == 0) {
553 error = ldi_open_by_devid(tmpdevid, minor_name,
554 FREAD, kcred, &vd_lh, zfs_li);
555 ddi_devid_free(tmpdevid);
556 ddi_devid_str_free(minor_name);
557 }
558
559 if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
560 zfs_li)))
561 return (error);
562
563 if (ldi_get_size(vd_lh, &s)) {
564 (void) ldi_close(vd_lh, FREAD, kcred);
565 return (EIO);
566 }
567
568 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
569 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
570
571 *config = NULL;
572 for (l = 0; l < VDEV_LABELS; l++) {
573 uint64_t offset, state, txg = 0;
574
575 /* read vdev label */
576 offset = vdev_label_offset(size, l, 0);
577 if (vdev_disk_physio(vd_lh, (caddr_t)label,
578 VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
579 continue;
580
581 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
582 sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
583 *config = NULL;
584 continue;
585 }
586
587 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
588 &state) != 0 || state >= POOL_STATE_DESTROYED) {
589 nvlist_free(*config);
590 *config = NULL;
591 continue;
592 }
593
594 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
595 &txg) != 0 || txg == 0) {
596 nvlist_free(*config);
597 *config = NULL;
598 continue;
599 }
600
601 break;
602 }
603
604 kmem_free(label, sizeof (vdev_label_t));
605 (void) ldi_close(vd_lh, FREAD, kcred);
606 if (*config == NULL)
607 error = EIDRM;
608
609 return (error);
610}
| 338 /*
339 * Clear the nowritecache bit, so that on a vdev_reopen() we will
340 * try again.
341 */
342 vd->vdev_nowritecache = B_FALSE;
343
344 return (0);
345}
346
347static void
348vdev_disk_close(vdev_t *vd)
349{
350 vdev_disk_t *dvd = vd->vdev_tsd;
351
352 if (vd->vdev_reopening || dvd == NULL)
353 return;
354
355 if (dvd->vd_minor != NULL)
356 ddi_devid_str_free(dvd->vd_minor);
357
358 if (dvd->vd_devid != NULL)
359 ddi_devid_free(dvd->vd_devid);
360
361 if (dvd->vd_lh != NULL)
362 (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
363
364 vd->vdev_delayed_close = B_FALSE;
365 kmem_free(dvd, sizeof (vdev_disk_t));
366 vd->vdev_tsd = NULL;
367}
368
369int
370vdev_disk_physio(ldi_handle_t vd_lh, caddr_t data, size_t size,
371 uint64_t offset, int flags)
372{
373 buf_t *bp;
374 int error = 0;
375
376 if (vd_lh == NULL)
377 return (EINVAL);
378
379 ASSERT(flags & B_READ || flags & B_WRITE);
380
381 bp = getrbuf(KM_SLEEP);
382 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
383 bp->b_bcount = size;
384 bp->b_un.b_addr = (void *)data;
385 bp->b_lblkno = lbtodb(offset);
386 bp->b_bufsize = size;
387
388 error = ldi_strategy(vd_lh, bp);
389 ASSERT(error == 0);
390 if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
391 error = EIO;
392 freerbuf(bp);
393
394 return (error);
395}
396
397static void
398vdev_disk_io_intr(buf_t *bp)
399{
400 vdev_disk_buf_t *vdb = (vdev_disk_buf_t *)bp;
401 zio_t *zio = vdb->vdb_io;
402
403 /*
404 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
405 * Rather than teach the rest of the stack about other error
406 * possibilities (EFAULT, etc), we normalize the error value here.
407 */
408 zio->io_error = (geterror(bp) != 0 ? EIO : 0);
409
410 if (zio->io_error == 0 && bp->b_resid != 0)
411 zio->io_error = EIO;
412
413 kmem_free(vdb, sizeof (vdev_disk_buf_t));
414
415 zio_interrupt(zio);
416}
417
418static void
419vdev_disk_ioctl_free(zio_t *zio)
420{
421 kmem_free(zio->io_vsd, sizeof (struct dk_callback));
422}
423
424static const zio_vsd_ops_t vdev_disk_vsd_ops = {
425 vdev_disk_ioctl_free,
426 zio_vsd_default_cksum_report
427};
428
429static void
430vdev_disk_ioctl_done(void *zio_arg, int error)
431{
432 zio_t *zio = zio_arg;
433
434 zio->io_error = error;
435
436 zio_interrupt(zio);
437}
438
439static int
440vdev_disk_io_start(zio_t *zio)
441{
442 vdev_t *vd = zio->io_vd;
443 vdev_disk_t *dvd = vd->vdev_tsd;
444 vdev_disk_buf_t *vdb;
445 struct dk_callback *dkc;
446 buf_t *bp;
447 int error;
448
449 if (zio->io_type == ZIO_TYPE_IOCTL) {
450 /* XXPOLICY */
451 if (!vdev_readable(vd)) {
452 zio->io_error = ENXIO;
453 return (ZIO_PIPELINE_CONTINUE);
454 }
455
456 switch (zio->io_cmd) {
457
458 case DKIOCFLUSHWRITECACHE:
459
460 if (zfs_nocacheflush)
461 break;
462
463 if (vd->vdev_nowritecache) {
464 zio->io_error = ENOTSUP;
465 break;
466 }
467
468 zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
469 zio->io_vsd_ops = &vdev_disk_vsd_ops;
470
471 dkc->dkc_callback = vdev_disk_ioctl_done;
472 dkc->dkc_flag = FLUSH_VOLATILE;
473 dkc->dkc_cookie = zio;
474
475 error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
476 (uintptr_t)dkc, FKIOCTL, kcred, NULL);
477
478 if (error == 0) {
479 /*
480 * The ioctl will be done asychronously,
481 * and will call vdev_disk_ioctl_done()
482 * upon completion.
483 */
484 return (ZIO_PIPELINE_STOP);
485 }
486
487 if (error == ENOTSUP || error == ENOTTY) {
488 /*
489 * If we get ENOTSUP or ENOTTY, we know that
490 * no future attempts will ever succeed.
491 * In this case we set a persistent bit so
492 * that we don't bother with the ioctl in the
493 * future.
494 */
495 vd->vdev_nowritecache = B_TRUE;
496 }
497 zio->io_error = error;
498
499 break;
500
501 default:
502 zio->io_error = ENOTSUP;
503 }
504
505 return (ZIO_PIPELINE_CONTINUE);
506 }
507
508 vdb = kmem_alloc(sizeof (vdev_disk_buf_t), KM_SLEEP);
509
510 vdb->vdb_io = zio;
511 bp = &vdb->vdb_buf;
512
513 bioinit(bp);
514 bp->b_flags = B_BUSY | B_NOCACHE |
515 (zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE);
516 if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
517 bp->b_flags |= B_FAILFAST;
518 bp->b_bcount = zio->io_size;
519 bp->b_un.b_addr = zio->io_data;
520 bp->b_lblkno = lbtodb(zio->io_offset);
521 bp->b_bufsize = zio->io_size;
522 bp->b_iodone = (int (*)())vdev_disk_io_intr;
523
524 /* ldi_strategy() will return non-zero only on programming errors */
525 VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0);
526
527 return (ZIO_PIPELINE_STOP);
528}
529
530static void
531vdev_disk_io_done(zio_t *zio)
532{
533 vdev_t *vd = zio->io_vd;
534
535 /*
536 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
537 * the device has been removed. If this is the case, then we trigger an
538 * asynchronous removal of the device. Otherwise, probe the device and
539 * make sure it's still accessible.
540 */
541 if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
542 vdev_disk_t *dvd = vd->vdev_tsd;
543 int state = DKIO_NONE;
544
545 if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
546 FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
547 /*
548 * We post the resource as soon as possible, instead of
549 * when the async removal actually happens, because the
550 * DE is using this information to discard previous I/O
551 * errors.
552 */
553 zfs_post_remove(zio->io_spa, vd);
554 vd->vdev_remove_wanted = B_TRUE;
555 spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
556 } else if (!vd->vdev_delayed_close) {
557 vd->vdev_delayed_close = B_TRUE;
558 }
559 }
560}
561
562vdev_ops_t vdev_disk_ops = {
563 vdev_disk_open,
564 vdev_disk_close,
565 vdev_default_asize,
566 vdev_disk_io_start,
567 vdev_disk_io_done,
568 NULL,
569 vdev_disk_hold,
570 vdev_disk_rele,
571 VDEV_TYPE_DISK, /* name of this vdev type */
572 B_TRUE /* leaf vdev */
573};
574
575/*
576 * Given the root disk device devid or pathname, read the label from
577 * the device, and construct a configuration nvlist.
578 */
579int
580vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
581{
582 ldi_handle_t vd_lh;
583 vdev_label_t *label;
584 uint64_t s, size;
585 int l;
586 ddi_devid_t tmpdevid;
587 int error = -1;
588 char *minor_name;
589
590 /*
591 * Read the device label and build the nvlist.
592 */
593 if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
594 &minor_name) == 0) {
595 error = ldi_open_by_devid(tmpdevid, minor_name,
596 FREAD, kcred, &vd_lh, zfs_li);
597 ddi_devid_free(tmpdevid);
598 ddi_devid_str_free(minor_name);
599 }
600
601 if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
602 zfs_li)))
603 return (error);
604
605 if (ldi_get_size(vd_lh, &s)) {
606 (void) ldi_close(vd_lh, FREAD, kcred);
607 return (EIO);
608 }
609
610 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
611 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
612
613 *config = NULL;
614 for (l = 0; l < VDEV_LABELS; l++) {
615 uint64_t offset, state, txg = 0;
616
617 /* read vdev label */
618 offset = vdev_label_offset(size, l, 0);
619 if (vdev_disk_physio(vd_lh, (caddr_t)label,
620 VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
621 continue;
622
623 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
624 sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
625 *config = NULL;
626 continue;
627 }
628
629 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
630 &state) != 0 || state >= POOL_STATE_DESTROYED) {
631 nvlist_free(*config);
632 *config = NULL;
633 continue;
634 }
635
636 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
637 &txg) != 0 || txg == 0) {
638 nvlist_free(*config);
639 *config = NULL;
640 continue;
641 }
642
643 break;
644 }
645
646 kmem_free(label, sizeof (vdev_label_t));
647 (void) ldi_close(vd_lh, FREAD, kcred);
648 if (*config == NULL)
649 error = EIDRM;
650
651 return (error);
652}
|