author | maybee |
Thu, 22 May 2008 11:13:47 -0700 | |
changeset 6689 | 47572a2f5e73 |
parent 6423 | 437422a29d3a |
child 6723 | 95f33d4e0a04 |
permissions | -rw-r--r-- |
789 | 1 |
/* |
2 |
* CDDL HEADER START |
|
3 |
* |
|
4 |
* The contents of this file are subject to the terms of the |
|
1544 | 5 |
* Common Development and Distribution License (the "License"). |
6 |
* You may not use this file except in compliance with the License. |
|
789 | 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] |
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18 |
* |
|
19 |
* CDDL HEADER END |
|
20 |
*/ |
|
21 |
/* |
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6423 | 22 |
* Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
789 | 23 |
* Use is subject to license terms. |
24 |
*/ |
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25 |
||
26 |
#pragma ident "%Z%%M% %I% %E% SMI" |
|
27 |
||
28 |
/* |
|
29 |
* ZFS volume emulation driver. |
|
30 |
* |
|
31 |
* Makes a DMU object look like a volume of arbitrary size, up to 2^64 bytes. |
|
32 |
* Volumes are accessed through the symbolic links named: |
|
33 |
* |
|
34 |
* /dev/zvol/dsk/<pool_name>/<dataset_name> |
|
35 |
* /dev/zvol/rdsk/<pool_name>/<dataset_name> |
|
36 |
* |
|
37 |
* These links are created by the ZFS-specific devfsadm link generator. |
|
38 |
* Volumes are persistent through reboot. No user command needs to be |
|
39 |
* run before opening and using a device. |
|
40 |
*/ |
|
41 |
||
42 |
#include <sys/types.h> |
|
43 |
#include <sys/param.h> |
|
44 |
#include <sys/errno.h> |
|
45 |
#include <sys/uio.h> |
|
46 |
#include <sys/buf.h> |
|
47 |
#include <sys/modctl.h> |
|
48 |
#include <sys/open.h> |
|
49 |
#include <sys/kmem.h> |
|
50 |
#include <sys/conf.h> |
|
51 |
#include <sys/cmn_err.h> |
|
52 |
#include <sys/stat.h> |
|
53 |
#include <sys/zap.h> |
|
54 |
#include <sys/spa.h> |
|
55 |
#include <sys/zio.h> |
|
6423 | 56 |
#include <sys/dmu_traverse.h> |
57 |
#include <sys/dnode.h> |
|
58 |
#include <sys/dsl_dataset.h> |
|
789 | 59 |
#include <sys/dsl_prop.h> |
60 |
#include <sys/dkio.h> |
|
61 |
#include <sys/efi_partition.h> |
|
62 |
#include <sys/byteorder.h> |
|
63 |
#include <sys/pathname.h> |
|
64 |
#include <sys/ddi.h> |
|
65 |
#include <sys/sunddi.h> |
|
66 |
#include <sys/crc32.h> |
|
67 |
#include <sys/dirent.h> |
|
68 |
#include <sys/policy.h> |
|
69 |
#include <sys/fs/zfs.h> |
|
70 |
#include <sys/zfs_ioctl.h> |
|
71 |
#include <sys/mkdev.h> |
|
1141 | 72 |
#include <sys/zil.h> |
2237 | 73 |
#include <sys/refcount.h> |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
74 |
#include <sys/zfs_znode.h> |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
75 |
#include <sys/zfs_rlock.h> |
6423 | 76 |
#include <sys/vdev_disk.h> |
77 |
#include <sys/vdev_impl.h> |
|
78 |
#include <sys/zvol.h> |
|
79 |
#include <sys/dumphdr.h> |
|
789 | 80 |
|
81 |
#include "zfs_namecheck.h" |
|
82 |
||
6423 | 83 |
static void *zvol_state; |
789 | 84 |
|
6423 | 85 |
#define ZVOL_DUMPSIZE "dumpsize" |
789 | 86 |
|
87 |
/* |
|
88 |
* This lock protects the zvol_state structure from being modified |
|
89 |
* while it's being used, e.g. an open that comes in before a create |
|
90 |
* finishes. It also protects temporary opens of the dataset so that, |
|
91 |
* e.g., an open doesn't get a spurious EBUSY. |
|
92 |
*/ |
|
93 |
static kmutex_t zvol_state_lock; |
|
94 |
static uint32_t zvol_minors; |
|
95 |
||
6423 | 96 |
#define NUM_EXTENTS ((SPA_MAXBLOCKSIZE) / sizeof (zvol_extent_t)) |
97 |
||
98 |
typedef struct zvol_extent { |
|
99 |
dva_t ze_dva; /* dva associated with this extent */ |
|
100 |
uint64_t ze_stride; /* extent stride */ |
|
101 |
uint64_t ze_size; /* number of blocks in extent */ |
|
102 |
} zvol_extent_t; |
|
103 |
||
104 |
/* |
|
105 |
* The list of extents associated with the dump device |
|
106 |
*/ |
|
107 |
typedef struct zvol_ext_list { |
|
108 |
zvol_extent_t zl_extents[NUM_EXTENTS]; |
|
109 |
struct zvol_ext_list *zl_next; |
|
110 |
} zvol_ext_list_t; |
|
111 |
||
789 | 112 |
/* |
113 |
* The in-core state of each volume. |
|
114 |
*/ |
|
115 |
typedef struct zvol_state { |
|
116 |
char zv_name[MAXPATHLEN]; /* pool/dd name */ |
|
117 |
uint64_t zv_volsize; /* amount of space we advertise */ |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
118 |
uint64_t zv_volblocksize; /* volume block size */ |
789 | 119 |
minor_t zv_minor; /* minor number */ |
120 |
uint8_t zv_min_bs; /* minimum addressable block shift */ |
|
6423 | 121 |
uint8_t zv_flags; /* readonly; dumpified */ |
789 | 122 |
objset_t *zv_objset; /* objset handle */ |
123 |
uint32_t zv_mode; /* DS_MODE_* flags at open time */ |
|
124 |
uint32_t zv_open_count[OTYPCNT]; /* open counts */ |
|
125 |
uint32_t zv_total_opens; /* total open count */ |
|
1141 | 126 |
zilog_t *zv_zilog; /* ZIL handle */ |
6423 | 127 |
zvol_ext_list_t *zv_list; /* List of extents for dump */ |
1141 | 128 |
uint64_t zv_txg_assign; /* txg to assign during ZIL replay */ |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
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|
129 |
znode_t zv_znode; /* for range locking */ |
789 | 130 |
} zvol_state_t; |
131 |
||
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
132 |
/* |
6423 | 133 |
* zvol specific flags |
134 |
*/ |
|
135 |
#define ZVOL_RDONLY 0x1 |
|
136 |
#define ZVOL_DUMPIFIED 0x2 |
|
137 |
||
138 |
/* |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
139 |
* zvol maximum transfer in one DMU tx. |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
140 |
*/ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
141 |
int zvol_maxphys = DMU_MAX_ACCESS/2; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
142 |
|
6423 | 143 |
extern int zfs_set_prop_nvlist(const char *, nvlist_t *); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
144 |
static int zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio); |
6423 | 145 |
static int zvol_dumpify(zvol_state_t *zv); |
146 |
static int zvol_dump_fini(zvol_state_t *zv); |
|
147 |
static int zvol_dump_init(zvol_state_t *zv, boolean_t resize); |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
148 |
|
789 | 149 |
static void |
4787 | 150 |
zvol_size_changed(zvol_state_t *zv, major_t maj) |
789 | 151 |
{ |
4787 | 152 |
dev_t dev = makedevice(maj, zv->zv_minor); |
789 | 153 |
|
154 |
VERIFY(ddi_prop_update_int64(dev, zfs_dip, |
|
155 |
"Size", zv->zv_volsize) == DDI_SUCCESS); |
|
156 |
VERIFY(ddi_prop_update_int64(dev, zfs_dip, |
|
157 |
"Nblocks", lbtodb(zv->zv_volsize)) == DDI_SUCCESS); |
|
6423 | 158 |
|
159 |
/* Notify specfs to invalidate the cached size */ |
|
160 |
spec_size_invalidate(dev, VBLK); |
|
161 |
spec_size_invalidate(dev, VCHR); |
|
789 | 162 |
} |
163 |
||
164 |
int |
|
2676 | 165 |
zvol_check_volsize(uint64_t volsize, uint64_t blocksize) |
789 | 166 |
{ |
2676 | 167 |
if (volsize == 0) |
789 | 168 |
return (EINVAL); |
169 |
||
2676 | 170 |
if (volsize % blocksize != 0) |
1133
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
171 |
return (EINVAL); |
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
172 |
|
789 | 173 |
#ifdef _ILP32 |
2676 | 174 |
if (volsize - 1 > SPEC_MAXOFFSET_T) |
789 | 175 |
return (EOVERFLOW); |
176 |
#endif |
|
177 |
return (0); |
|
178 |
} |
|
179 |
||
180 |
int |
|
2676 | 181 |
zvol_check_volblocksize(uint64_t volblocksize) |
789 | 182 |
{ |
2676 | 183 |
if (volblocksize < SPA_MINBLOCKSIZE || |
184 |
volblocksize > SPA_MAXBLOCKSIZE || |
|
185 |
!ISP2(volblocksize)) |
|
789 | 186 |
return (EDOM); |
187 |
||
188 |
return (0); |
|
189 |
} |
|
190 |
||
191 |
static void |
|
192 |
zvol_readonly_changed_cb(void *arg, uint64_t newval) |
|
193 |
{ |
|
194 |
zvol_state_t *zv = arg; |
|
195 |
||
6423 | 196 |
if (newval) |
197 |
zv->zv_flags |= ZVOL_RDONLY; |
|
198 |
else |
|
199 |
zv->zv_flags &= ~ZVOL_RDONLY; |
|
789 | 200 |
} |
201 |
||
202 |
int |
|
2885 | 203 |
zvol_get_stats(objset_t *os, nvlist_t *nv) |
789 | 204 |
{ |
205 |
int error; |
|
206 |
dmu_object_info_t doi; |
|
2885 | 207 |
uint64_t val; |
789 | 208 |
|
209 |
||
2885 | 210 |
error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &val); |
789 | 211 |
if (error) |
212 |
return (error); |
|
213 |
||
2885 | 214 |
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLSIZE, val); |
215 |
||
789 | 216 |
error = dmu_object_info(os, ZVOL_OBJ, &doi); |
217 |
||
2885 | 218 |
if (error == 0) { |
219 |
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLBLOCKSIZE, |
|
220 |
doi.doi_data_block_size); |
|
221 |
} |
|
789 | 222 |
|
223 |
return (error); |
|
224 |
} |
|
225 |
||
226 |
/* |
|
227 |
* Find a free minor number. |
|
228 |
*/ |
|
229 |
static minor_t |
|
230 |
zvol_minor_alloc(void) |
|
231 |
{ |
|
232 |
minor_t minor; |
|
233 |
||
234 |
ASSERT(MUTEX_HELD(&zvol_state_lock)); |
|
235 |
||
236 |
for (minor = 1; minor <= ZVOL_MAX_MINOR; minor++) |
|
237 |
if (ddi_get_soft_state(zvol_state, minor) == NULL) |
|
238 |
return (minor); |
|
239 |
||
240 |
return (0); |
|
241 |
} |
|
242 |
||
243 |
static zvol_state_t * |
|
2676 | 244 |
zvol_minor_lookup(const char *name) |
789 | 245 |
{ |
246 |
minor_t minor; |
|
247 |
zvol_state_t *zv; |
|
248 |
||
249 |
ASSERT(MUTEX_HELD(&zvol_state_lock)); |
|
250 |
||
251 |
for (minor = 1; minor <= ZVOL_MAX_MINOR; minor++) { |
|
252 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
253 |
if (zv == NULL) |
|
254 |
continue; |
|
255 |
if (strcmp(zv->zv_name, name) == 0) |
|
256 |
break; |
|
257 |
} |
|
258 |
||
259 |
return (zv); |
|
260 |
} |
|
261 |
||
6423 | 262 |
void |
263 |
zvol_init_extent(zvol_extent_t *ze, blkptr_t *bp) |
|
264 |
{ |
|
265 |
ze->ze_dva = bp->blk_dva[0]; /* structure assignment */ |
|
266 |
ze->ze_stride = 0; |
|
267 |
ze->ze_size = 1; |
|
268 |
} |
|
269 |
||
270 |
/* extent mapping arg */ |
|
271 |
struct maparg { |
|
272 |
zvol_ext_list_t *ma_list; |
|
273 |
zvol_extent_t *ma_extent; |
|
274 |
int ma_gang; |
|
275 |
}; |
|
276 |
||
277 |
/*ARGSUSED*/ |
|
278 |
static int |
|
279 |
zvol_map_block(traverse_blk_cache_t *bc, spa_t *spa, void *arg) |
|
280 |
{ |
|
281 |
zbookmark_t *zb = &bc->bc_bookmark; |
|
282 |
blkptr_t *bp = &bc->bc_blkptr; |
|
283 |
void *data = bc->bc_data; |
|
284 |
dnode_phys_t *dnp = bc->bc_dnode; |
|
285 |
struct maparg *ma = (struct maparg *)arg; |
|
286 |
uint64_t stride; |
|
287 |
||
288 |
/* If there is an error, then keep trying to make progress */ |
|
289 |
if (bc->bc_errno) |
|
290 |
return (ERESTART); |
|
291 |
||
292 |
#ifdef ZFS_DEBUG |
|
293 |
if (zb->zb_level == -1) { |
|
294 |
ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET); |
|
295 |
ASSERT3U(BP_GET_LEVEL(bp), ==, 0); |
|
296 |
} else { |
|
297 |
ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type); |
|
298 |
ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level); |
|
299 |
} |
|
300 |
||
301 |
if (zb->zb_level > 0) { |
|
302 |
uint64_t fill = 0; |
|
303 |
blkptr_t *bpx, *bpend; |
|
304 |
||
305 |
for (bpx = data, bpend = bpx + BP_GET_LSIZE(bp) / sizeof (*bpx); |
|
306 |
bpx < bpend; bpx++) { |
|
307 |
if (bpx->blk_birth != 0) { |
|
308 |
fill += bpx->blk_fill; |
|
309 |
} else { |
|
310 |
ASSERT(bpx->blk_fill == 0); |
|
311 |
} |
|
312 |
} |
|
313 |
ASSERT3U(fill, ==, bp->blk_fill); |
|
314 |
} |
|
315 |
||
316 |
if (zb->zb_level == 0 && dnp->dn_type == DMU_OT_DNODE) { |
|
317 |
uint64_t fill = 0; |
|
318 |
dnode_phys_t *dnx, *dnend; |
|
319 |
||
320 |
for (dnx = data, dnend = dnx + (BP_GET_LSIZE(bp)>>DNODE_SHIFT); |
|
321 |
dnx < dnend; dnx++) { |
|
322 |
if (dnx->dn_type != DMU_OT_NONE) |
|
323 |
fill++; |
|
324 |
} |
|
325 |
ASSERT3U(fill, ==, bp->blk_fill); |
|
326 |
} |
|
327 |
#endif |
|
328 |
||
329 |
if (zb->zb_level || dnp->dn_type == DMU_OT_DNODE) |
|
330 |
return (0); |
|
331 |
||
332 |
/* Abort immediately if we have encountered gang blocks */ |
|
333 |
if (BP_IS_GANG(bp)) { |
|
334 |
ma->ma_gang++; |
|
335 |
return (EINTR); |
|
336 |
} |
|
337 |
||
338 |
/* first time? */ |
|
339 |
if (ma->ma_extent->ze_size == 0) { |
|
340 |
zvol_init_extent(ma->ma_extent, bp); |
|
341 |
return (0); |
|
342 |
} |
|
343 |
||
344 |
stride = (DVA_GET_OFFSET(&bp->blk_dva[0])) - |
|
345 |
((DVA_GET_OFFSET(&ma->ma_extent->ze_dva)) + |
|
346 |
(ma->ma_extent->ze_size - 1) * (ma->ma_extent->ze_stride)); |
|
347 |
if (DVA_GET_VDEV(BP_IDENTITY(bp)) == |
|
348 |
DVA_GET_VDEV(&ma->ma_extent->ze_dva)) { |
|
349 |
if (ma->ma_extent->ze_stride == 0) { |
|
350 |
/* second block in this extent */ |
|
351 |
ma->ma_extent->ze_stride = stride; |
|
352 |
ma->ma_extent->ze_size++; |
|
353 |
return (0); |
|
354 |
} else if (ma->ma_extent->ze_stride == stride) { |
|
355 |
/* |
|
356 |
* the block we allocated has the same |
|
357 |
* stride |
|
358 |
*/ |
|
359 |
ma->ma_extent->ze_size++; |
|
360 |
return (0); |
|
361 |
} |
|
362 |
} |
|
363 |
||
364 |
/* |
|
365 |
* dtrace -n 'zfs-dprintf |
|
366 |
* /stringof(arg0) == "zvol.c"/ |
|
367 |
* { |
|
368 |
* printf("%s: %s", stringof(arg1), stringof(arg3)) |
|
369 |
* } ' |
|
370 |
*/ |
|
371 |
dprintf("ma_extent 0x%lx mrstride 0x%lx stride %lx\n", |
|
372 |
ma->ma_extent->ze_size, ma->ma_extent->ze_stride, stride); |
|
373 |
dprintf_bp(bp, "%s", "next blkptr:"); |
|
374 |
/* start a new extent */ |
|
375 |
if (ma->ma_extent == &ma->ma_list->zl_extents[NUM_EXTENTS - 1]) { |
|
376 |
ma->ma_list->zl_next = kmem_zalloc(sizeof (zvol_ext_list_t), |
|
377 |
KM_SLEEP); |
|
378 |
ma->ma_list = ma->ma_list->zl_next; |
|
379 |
ma->ma_extent = &ma->ma_list->zl_extents[0]; |
|
380 |
} else { |
|
381 |
ma->ma_extent++; |
|
382 |
} |
|
383 |
zvol_init_extent(ma->ma_extent, bp); |
|
384 |
return (0); |
|
385 |
} |
|
386 |
||
4543 | 387 |
/* ARGSUSED */ |
789 | 388 |
void |
4543 | 389 |
zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) |
789 | 390 |
{ |
5331 | 391 |
zfs_creat_t *zct = arg; |
392 |
nvlist_t *nvprops = zct->zct_props; |
|
789 | 393 |
int error; |
2676 | 394 |
uint64_t volblocksize, volsize; |
789 | 395 |
|
4543 | 396 |
VERIFY(nvlist_lookup_uint64(nvprops, |
2676 | 397 |
zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) == 0); |
4543 | 398 |
if (nvlist_lookup_uint64(nvprops, |
2676 | 399 |
zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &volblocksize) != 0) |
400 |
volblocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); |
|
401 |
||
402 |
/* |
|
6423 | 403 |
* These properties must be removed from the list so the generic |
2676 | 404 |
* property setting step won't apply to them. |
405 |
*/ |
|
4543 | 406 |
VERIFY(nvlist_remove_all(nvprops, |
2676 | 407 |
zfs_prop_to_name(ZFS_PROP_VOLSIZE)) == 0); |
4543 | 408 |
(void) nvlist_remove_all(nvprops, |
2676 | 409 |
zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE)); |
410 |
||
411 |
error = dmu_object_claim(os, ZVOL_OBJ, DMU_OT_ZVOL, volblocksize, |
|
789 | 412 |
DMU_OT_NONE, 0, tx); |
413 |
ASSERT(error == 0); |
|
414 |
||
415 |
error = zap_create_claim(os, ZVOL_ZAP_OBJ, DMU_OT_ZVOL_PROP, |
|
416 |
DMU_OT_NONE, 0, tx); |
|
417 |
ASSERT(error == 0); |
|
418 |
||
2676 | 419 |
error = zap_update(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize, tx); |
789 | 420 |
ASSERT(error == 0); |
421 |
} |
|
422 |
||
423 |
/* |
|
1141 | 424 |
* Replay a TX_WRITE ZIL transaction that didn't get committed |
425 |
* after a system failure |
|
426 |
*/ |
|
427 |
static int |
|
428 |
zvol_replay_write(zvol_state_t *zv, lr_write_t *lr, boolean_t byteswap) |
|
429 |
{ |
|
430 |
objset_t *os = zv->zv_objset; |
|
431 |
char *data = (char *)(lr + 1); /* data follows lr_write_t */ |
|
432 |
uint64_t off = lr->lr_offset; |
|
433 |
uint64_t len = lr->lr_length; |
|
434 |
dmu_tx_t *tx; |
|
435 |
int error; |
|
436 |
||
437 |
if (byteswap) |
|
438 |
byteswap_uint64_array(lr, sizeof (*lr)); |
|
439 |
||
440 |
tx = dmu_tx_create(os); |
|
441 |
dmu_tx_hold_write(tx, ZVOL_OBJ, off, len); |
|
442 |
error = dmu_tx_assign(tx, zv->zv_txg_assign); |
|
443 |
if (error) { |
|
444 |
dmu_tx_abort(tx); |
|
445 |
} else { |
|
446 |
dmu_write(os, ZVOL_OBJ, off, len, data, tx); |
|
447 |
dmu_tx_commit(tx); |
|
448 |
} |
|
449 |
||
450 |
return (error); |
|
451 |
} |
|
452 |
||
453 |
/* ARGSUSED */ |
|
454 |
static int |
|
455 |
zvol_replay_err(zvol_state_t *zv, lr_t *lr, boolean_t byteswap) |
|
456 |
{ |
|
457 |
return (ENOTSUP); |
|
458 |
} |
|
459 |
||
460 |
/* |
|
461 |
* Callback vectors for replaying records. |
|
462 |
* Only TX_WRITE is needed for zvol. |
|
463 |
*/ |
|
464 |
zil_replay_func_t *zvol_replay_vector[TX_MAX_TYPE] = { |
|
465 |
zvol_replay_err, /* 0 no such transaction type */ |
|
466 |
zvol_replay_err, /* TX_CREATE */ |
|
467 |
zvol_replay_err, /* TX_MKDIR */ |
|
468 |
zvol_replay_err, /* TX_MKXATTR */ |
|
469 |
zvol_replay_err, /* TX_SYMLINK */ |
|
470 |
zvol_replay_err, /* TX_REMOVE */ |
|
471 |
zvol_replay_err, /* TX_RMDIR */ |
|
472 |
zvol_replay_err, /* TX_LINK */ |
|
473 |
zvol_replay_err, /* TX_RENAME */ |
|
474 |
zvol_replay_write, /* TX_WRITE */ |
|
475 |
zvol_replay_err, /* TX_TRUNCATE */ |
|
476 |
zvol_replay_err, /* TX_SETATTR */ |
|
477 |
zvol_replay_err, /* TX_ACL */ |
|
478 |
}; |
|
479 |
||
480 |
/* |
|
6423 | 481 |
* reconstruct dva that gets us to the desired offset (offset |
482 |
* is in bytes) |
|
483 |
*/ |
|
484 |
int |
|
485 |
zvol_get_dva(zvol_state_t *zv, uint64_t offset, dva_t *dva) |
|
486 |
{ |
|
487 |
zvol_ext_list_t *zl; |
|
488 |
zvol_extent_t *ze; |
|
489 |
int idx; |
|
490 |
uint64_t tmp; |
|
491 |
||
492 |
if ((zl = zv->zv_list) == NULL) |
|
493 |
return (EIO); |
|
494 |
idx = 0; |
|
495 |
ze = &zl->zl_extents[0]; |
|
496 |
while (offset >= ze->ze_size * zv->zv_volblocksize) { |
|
497 |
offset -= ze->ze_size * zv->zv_volblocksize; |
|
498 |
||
499 |
if (idx == NUM_EXTENTS - 1) { |
|
500 |
/* we've reached the end of this array */ |
|
501 |
ASSERT(zl->zl_next != NULL); |
|
502 |
if (zl->zl_next == NULL) |
|
503 |
return (-1); |
|
504 |
zl = zl->zl_next; |
|
505 |
ze = &zl->zl_extents[0]; |
|
506 |
idx = 0; |
|
507 |
} else { |
|
508 |
ze++; |
|
509 |
idx++; |
|
510 |
} |
|
511 |
} |
|
512 |
DVA_SET_VDEV(dva, DVA_GET_VDEV(&ze->ze_dva)); |
|
513 |
tmp = DVA_GET_OFFSET((&ze->ze_dva)); |
|
514 |
tmp += (ze->ze_stride * (offset / zv->zv_volblocksize)); |
|
515 |
DVA_SET_OFFSET(dva, tmp); |
|
516 |
return (0); |
|
517 |
} |
|
518 |
||
519 |
static void |
|
520 |
zvol_free_extents(zvol_state_t *zv) |
|
521 |
{ |
|
522 |
zvol_ext_list_t *zl; |
|
523 |
zvol_ext_list_t *tmp; |
|
524 |
||
525 |
if (zv->zv_list != NULL) { |
|
526 |
zl = zv->zv_list; |
|
527 |
while (zl != NULL) { |
|
528 |
tmp = zl->zl_next; |
|
529 |
kmem_free(zl, sizeof (zvol_ext_list_t)); |
|
530 |
zl = tmp; |
|
531 |
} |
|
532 |
zv->zv_list = NULL; |
|
533 |
} |
|
534 |
} |
|
535 |
||
536 |
int |
|
537 |
zvol_get_lbas(zvol_state_t *zv) |
|
538 |
{ |
|
539 |
struct maparg ma; |
|
540 |
zvol_ext_list_t *zl; |
|
541 |
zvol_extent_t *ze; |
|
542 |
uint64_t blocks = 0; |
|
543 |
int err; |
|
544 |
||
545 |
ma.ma_list = zl = kmem_zalloc(sizeof (zvol_ext_list_t), KM_SLEEP); |
|
546 |
ma.ma_extent = &ma.ma_list->zl_extents[0]; |
|
547 |
ma.ma_gang = 0; |
|
548 |
zv->zv_list = ma.ma_list; |
|
549 |
||
550 |
err = traverse_zvol(zv->zv_objset, ADVANCE_PRE, zvol_map_block, &ma); |
|
551 |
if (err == EINTR && ma.ma_gang) { |
|
552 |
/* |
|
553 |
* We currently don't support dump devices when the pool |
|
554 |
* is so fragmented that our allocation has resulted in |
|
555 |
* gang blocks. |
|
556 |
*/ |
|
557 |
zvol_free_extents(zv); |
|
558 |
return (EFRAGS); |
|
559 |
} |
|
560 |
ASSERT3U(err, ==, 0); |
|
561 |
||
562 |
ze = &zl->zl_extents[0]; |
|
563 |
while (ze) { |
|
564 |
blocks += ze->ze_size; |
|
565 |
if (ze == &zl->zl_extents[NUM_EXTENTS - 1]) { |
|
566 |
zl = zl->zl_next; |
|
567 |
ze = &zl->zl_extents[0]; |
|
568 |
} else { |
|
569 |
ze++; |
|
570 |
} |
|
571 |
} |
|
572 |
if (blocks != (zv->zv_volsize / zv->zv_volblocksize)) { |
|
573 |
zvol_free_extents(zv); |
|
574 |
return (EIO); |
|
575 |
} |
|
576 |
||
577 |
return (0); |
|
578 |
} |
|
579 |
||
580 |
/* |
|
581 |
* Create a minor node (plus a whole lot more) for the specified volume. |
|
789 | 582 |
*/ |
583 |
int |
|
4787 | 584 |
zvol_create_minor(const char *name, major_t maj) |
789 | 585 |
{ |
586 |
zvol_state_t *zv; |
|
587 |
objset_t *os; |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
588 |
dmu_object_info_t doi; |
789 | 589 |
uint64_t volsize; |
590 |
minor_t minor = 0; |
|
591 |
struct pathname linkpath; |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6423
diff
changeset
|
592 |
int ds_mode = DS_MODE_OWNER; |
789 | 593 |
vnode_t *vp = NULL; |
594 |
char *devpath; |
|
6423 | 595 |
size_t devpathlen = strlen(ZVOL_FULL_DEV_DIR) + strlen(name) + 1; |
789 | 596 |
char chrbuf[30], blkbuf[30]; |
597 |
int error; |
|
598 |
||
599 |
mutex_enter(&zvol_state_lock); |
|
600 |
||
601 |
if ((zv = zvol_minor_lookup(name)) != NULL) { |
|
602 |
mutex_exit(&zvol_state_lock); |
|
603 |
return (EEXIST); |
|
604 |
} |
|
605 |
||
606 |
if (strchr(name, '@') != 0) |
|
607 |
ds_mode |= DS_MODE_READONLY; |
|
608 |
||
609 |
error = dmu_objset_open(name, DMU_OST_ZVOL, ds_mode, &os); |
|
610 |
||
611 |
if (error) { |
|
612 |
mutex_exit(&zvol_state_lock); |
|
613 |
return (error); |
|
614 |
} |
|
615 |
||
616 |
error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize); |
|
617 |
||
618 |
if (error) { |
|
619 |
dmu_objset_close(os); |
|
620 |
mutex_exit(&zvol_state_lock); |
|
621 |
return (error); |
|
622 |
} |
|
623 |
||
624 |
/* |
|
625 |
* If there's an existing /dev/zvol symlink, try to use the |
|
626 |
* same minor number we used last time. |
|
627 |
*/ |
|
628 |
devpath = kmem_alloc(devpathlen, KM_SLEEP); |
|
629 |
||
6423 | 630 |
(void) sprintf(devpath, "%s%s", ZVOL_FULL_DEV_DIR, name); |
789 | 631 |
|
632 |
error = lookupname(devpath, UIO_SYSSPACE, NO_FOLLOW, NULL, &vp); |
|
633 |
||
634 |
kmem_free(devpath, devpathlen); |
|
635 |
||
636 |
if (error == 0 && vp->v_type != VLNK) |
|
637 |
error = EINVAL; |
|
638 |
||
639 |
if (error == 0) { |
|
640 |
pn_alloc(&linkpath); |
|
641 |
error = pn_getsymlink(vp, &linkpath, kcred); |
|
642 |
if (error == 0) { |
|
643 |
char *ms = strstr(linkpath.pn_path, ZVOL_PSEUDO_DEV); |
|
644 |
if (ms != NULL) { |
|
645 |
ms += strlen(ZVOL_PSEUDO_DEV); |
|
646 |
minor = stoi(&ms); |
|
647 |
} |
|
648 |
} |
|
649 |
pn_free(&linkpath); |
|
650 |
} |
|
651 |
||
652 |
if (vp != NULL) |
|
653 |
VN_RELE(vp); |
|
654 |
||
655 |
/* |
|
656 |
* If we found a minor but it's already in use, we must pick a new one. |
|
657 |
*/ |
|
658 |
if (minor != 0 && ddi_get_soft_state(zvol_state, minor) != NULL) |
|
659 |
minor = 0; |
|
660 |
||
661 |
if (minor == 0) |
|
662 |
minor = zvol_minor_alloc(); |
|
663 |
||
664 |
if (minor == 0) { |
|
665 |
dmu_objset_close(os); |
|
666 |
mutex_exit(&zvol_state_lock); |
|
667 |
return (ENXIO); |
|
668 |
} |
|
669 |
||
670 |
if (ddi_soft_state_zalloc(zvol_state, minor) != DDI_SUCCESS) { |
|
671 |
dmu_objset_close(os); |
|
672 |
mutex_exit(&zvol_state_lock); |
|
673 |
return (EAGAIN); |
|
674 |
} |
|
675 |
||
2676 | 676 |
(void) ddi_prop_update_string(minor, zfs_dip, ZVOL_PROP_NAME, |
677 |
(char *)name); |
|
789 | 678 |
|
679 |
(void) sprintf(chrbuf, "%uc,raw", minor); |
|
680 |
||
681 |
if (ddi_create_minor_node(zfs_dip, chrbuf, S_IFCHR, |
|
682 |
minor, DDI_PSEUDO, 0) == DDI_FAILURE) { |
|
683 |
ddi_soft_state_free(zvol_state, minor); |
|
684 |
dmu_objset_close(os); |
|
685 |
mutex_exit(&zvol_state_lock); |
|
686 |
return (EAGAIN); |
|
687 |
} |
|
688 |
||
689 |
(void) sprintf(blkbuf, "%uc", minor); |
|
690 |
||
691 |
if (ddi_create_minor_node(zfs_dip, blkbuf, S_IFBLK, |
|
692 |
minor, DDI_PSEUDO, 0) == DDI_FAILURE) { |
|
693 |
ddi_remove_minor_node(zfs_dip, chrbuf); |
|
694 |
ddi_soft_state_free(zvol_state, minor); |
|
695 |
dmu_objset_close(os); |
|
696 |
mutex_exit(&zvol_state_lock); |
|
697 |
return (EAGAIN); |
|
698 |
} |
|
699 |
||
700 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
701 |
||
702 |
(void) strcpy(zv->zv_name, name); |
|
703 |
zv->zv_min_bs = DEV_BSHIFT; |
|
704 |
zv->zv_minor = minor; |
|
705 |
zv->zv_volsize = volsize; |
|
706 |
zv->zv_objset = os; |
|
707 |
zv->zv_mode = ds_mode; |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
708 |
zv->zv_zilog = zil_open(os, zvol_get_data); |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
709 |
mutex_init(&zv->zv_znode.z_range_lock, NULL, MUTEX_DEFAULT, NULL); |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
710 |
avl_create(&zv->zv_znode.z_range_avl, zfs_range_compare, |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
711 |
sizeof (rl_t), offsetof(rl_t, r_node)); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
712 |
/* get and cache the blocksize */ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
713 |
error = dmu_object_info(os, ZVOL_OBJ, &doi); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
714 |
ASSERT(error == 0); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
715 |
zv->zv_volblocksize = doi.doi_data_block_size; |
1141 | 716 |
|
3461 | 717 |
zil_replay(os, zv, &zv->zv_txg_assign, zvol_replay_vector); |
4787 | 718 |
zvol_size_changed(zv, maj); |
789 | 719 |
|
1544 | 720 |
/* XXX this should handle the possible i/o error */ |
789 | 721 |
VERIFY(dsl_prop_register(dmu_objset_ds(zv->zv_objset), |
722 |
"readonly", zvol_readonly_changed_cb, zv) == 0); |
|
723 |
||
724 |
zvol_minors++; |
|
725 |
||
726 |
mutex_exit(&zvol_state_lock); |
|
727 |
||
728 |
return (0); |
|
729 |
} |
|
730 |
||
731 |
/* |
|
732 |
* Remove minor node for the specified volume. |
|
733 |
*/ |
|
734 |
int |
|
2676 | 735 |
zvol_remove_minor(const char *name) |
789 | 736 |
{ |
737 |
zvol_state_t *zv; |
|
738 |
char namebuf[30]; |
|
739 |
||
740 |
mutex_enter(&zvol_state_lock); |
|
741 |
||
2676 | 742 |
if ((zv = zvol_minor_lookup(name)) == NULL) { |
789 | 743 |
mutex_exit(&zvol_state_lock); |
744 |
return (ENXIO); |
|
745 |
} |
|
746 |
||
747 |
if (zv->zv_total_opens != 0) { |
|
748 |
mutex_exit(&zvol_state_lock); |
|
749 |
return (EBUSY); |
|
750 |
} |
|
751 |
||
752 |
(void) sprintf(namebuf, "%uc,raw", zv->zv_minor); |
|
753 |
ddi_remove_minor_node(zfs_dip, namebuf); |
|
754 |
||
755 |
(void) sprintf(namebuf, "%uc", zv->zv_minor); |
|
756 |
ddi_remove_minor_node(zfs_dip, namebuf); |
|
757 |
||
758 |
VERIFY(dsl_prop_unregister(dmu_objset_ds(zv->zv_objset), |
|
759 |
"readonly", zvol_readonly_changed_cb, zv) == 0); |
|
760 |
||
1141 | 761 |
zil_close(zv->zv_zilog); |
762 |
zv->zv_zilog = NULL; |
|
789 | 763 |
dmu_objset_close(zv->zv_objset); |
764 |
zv->zv_objset = NULL; |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
765 |
avl_destroy(&zv->zv_znode.z_range_avl); |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
766 |
mutex_destroy(&zv->zv_znode.z_range_lock); |
789 | 767 |
|
768 |
ddi_soft_state_free(zvol_state, zv->zv_minor); |
|
769 |
||
770 |
zvol_minors--; |
|
771 |
||
772 |
mutex_exit(&zvol_state_lock); |
|
773 |
||
774 |
return (0); |
|
775 |
} |
|
776 |
||
6423 | 777 |
static int |
778 |
zvol_truncate(zvol_state_t *zv, uint64_t offset, uint64_t size) |
|
779 |
{ |
|
780 |
dmu_tx_t *tx; |
|
781 |
int error; |
|
782 |
||
783 |
tx = dmu_tx_create(zv->zv_objset); |
|
784 |
dmu_tx_hold_free(tx, ZVOL_OBJ, offset, size); |
|
785 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
786 |
if (error) { |
|
787 |
dmu_tx_abort(tx); |
|
788 |
return (error); |
|
789 |
} |
|
790 |
error = dmu_free_range(zv->zv_objset, ZVOL_OBJ, offset, size, tx); |
|
791 |
dmu_tx_commit(tx); |
|
792 |
return (0); |
|
793 |
} |
|
794 |
||
795 |
int |
|
796 |
zvol_prealloc(zvol_state_t *zv) |
|
797 |
{ |
|
798 |
objset_t *os = zv->zv_objset; |
|
799 |
dmu_tx_t *tx; |
|
800 |
void *data; |
|
801 |
uint64_t refd, avail, usedobjs, availobjs; |
|
802 |
uint64_t resid = zv->zv_volsize; |
|
803 |
uint64_t off = 0; |
|
804 |
||
805 |
/* Check the space usage before attempting to allocate the space */ |
|
806 |
dmu_objset_space(os, &refd, &avail, &usedobjs, &availobjs); |
|
807 |
if (avail < zv->zv_volsize) |
|
808 |
return (ENOSPC); |
|
809 |
||
810 |
/* Free old extents if they exist */ |
|
811 |
zvol_free_extents(zv); |
|
812 |
||
813 |
/* allocate the blocks by writing each one */ |
|
814 |
data = kmem_zalloc(SPA_MAXBLOCKSIZE, KM_SLEEP); |
|
815 |
||
816 |
while (resid != 0) { |
|
817 |
int error; |
|
818 |
uint64_t bytes = MIN(resid, SPA_MAXBLOCKSIZE); |
|
819 |
||
820 |
tx = dmu_tx_create(os); |
|
821 |
dmu_tx_hold_write(tx, ZVOL_OBJ, off, bytes); |
|
822 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
823 |
if (error) { |
|
824 |
dmu_tx_abort(tx); |
|
825 |
kmem_free(data, SPA_MAXBLOCKSIZE); |
|
826 |
(void) zvol_truncate(zv, 0, off); |
|
827 |
return (error); |
|
828 |
} |
|
829 |
dmu_write(os, ZVOL_OBJ, off, bytes, data, tx); |
|
830 |
dmu_tx_commit(tx); |
|
831 |
off += bytes; |
|
832 |
resid -= bytes; |
|
833 |
} |
|
834 |
kmem_free(data, SPA_MAXBLOCKSIZE); |
|
835 |
txg_wait_synced(dmu_objset_pool(os), 0); |
|
836 |
||
837 |
return (0); |
|
838 |
} |
|
839 |
||
840 |
int |
|
841 |
zvol_update_volsize(zvol_state_t *zv, major_t maj, uint64_t volsize) |
|
842 |
{ |
|
843 |
dmu_tx_t *tx; |
|
844 |
int error; |
|
845 |
||
846 |
ASSERT(MUTEX_HELD(&zvol_state_lock)); |
|
847 |
||
848 |
tx = dmu_tx_create(zv->zv_objset); |
|
849 |
dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL); |
|
850 |
dmu_tx_hold_free(tx, ZVOL_OBJ, volsize, DMU_OBJECT_END); |
|
851 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
852 |
if (error) { |
|
853 |
dmu_tx_abort(tx); |
|
854 |
return (error); |
|
855 |
} |
|
856 |
||
857 |
error = zap_update(zv->zv_objset, ZVOL_ZAP_OBJ, "size", 8, 1, |
|
858 |
&volsize, tx); |
|
859 |
dmu_tx_commit(tx); |
|
860 |
||
861 |
if (error == 0) |
|
862 |
error = zvol_truncate(zv, volsize, DMU_OBJECT_END); |
|
863 |
||
864 |
if (error == 0) { |
|
865 |
zv->zv_volsize = volsize; |
|
866 |
zvol_size_changed(zv, maj); |
|
867 |
} |
|
868 |
return (error); |
|
869 |
} |
|
870 |
||
789 | 871 |
int |
4787 | 872 |
zvol_set_volsize(const char *name, major_t maj, uint64_t volsize) |
789 | 873 |
{ |
874 |
zvol_state_t *zv; |
|
875 |
int error; |
|
1133
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
876 |
dmu_object_info_t doi; |
6423 | 877 |
uint64_t old_volsize = 0ULL; |
789 | 878 |
|
879 |
mutex_enter(&zvol_state_lock); |
|
880 |
||
2676 | 881 |
if ((zv = zvol_minor_lookup(name)) == NULL) { |
789 | 882 |
mutex_exit(&zvol_state_lock); |
883 |
return (ENXIO); |
|
884 |
} |
|
6423 | 885 |
old_volsize = zv->zv_volsize; |
789 | 886 |
|
1133
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
887 |
if ((error = dmu_object_info(zv->zv_objset, ZVOL_OBJ, &doi)) != 0 || |
2676 | 888 |
(error = zvol_check_volsize(volsize, |
889 |
doi.doi_data_block_size)) != 0) { |
|
1133
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
890 |
mutex_exit(&zvol_state_lock); |
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
891 |
return (error); |
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
892 |
} |
335d069294d1
6357470 vdev_raidz.c has unused RAIDZ_SINGLE define, code
eschrock
parents:
849
diff
changeset
|
893 |
|
6423 | 894 |
if (zv->zv_flags & ZVOL_RDONLY || (zv->zv_mode & DS_MODE_READONLY)) { |
789 | 895 |
mutex_exit(&zvol_state_lock); |
896 |
return (EROFS); |
|
897 |
} |
|
898 |
||
6423 | 899 |
error = zvol_update_volsize(zv, maj, volsize); |
789 | 900 |
|
6423 | 901 |
/* |
902 |
* Reinitialize the dump area to the new size. If we |
|
903 |
* failed to resize the dump area then restore the it back to |
|
904 |
* it's original size. |
|
905 |
*/ |
|
906 |
if (error == 0 && zv->zv_flags & ZVOL_DUMPIFIED) { |
|
907 |
if ((error = zvol_dumpify(zv)) != 0 || |
|
908 |
(error = dumpvp_resize()) != 0) { |
|
909 |
(void) zvol_update_volsize(zv, maj, old_volsize); |
|
910 |
error = zvol_dumpify(zv); |
|
911 |
} |
|
789 | 912 |
} |
913 |
||
914 |
mutex_exit(&zvol_state_lock); |
|
915 |
||
916 |
return (error); |
|
917 |
} |
|
918 |
||
919 |
int |
|
2676 | 920 |
zvol_set_volblocksize(const char *name, uint64_t volblocksize) |
789 | 921 |
{ |
922 |
zvol_state_t *zv; |
|
923 |
dmu_tx_t *tx; |
|
924 |
int error; |
|
925 |
||
926 |
mutex_enter(&zvol_state_lock); |
|
927 |
||
2676 | 928 |
if ((zv = zvol_minor_lookup(name)) == NULL) { |
789 | 929 |
mutex_exit(&zvol_state_lock); |
930 |
return (ENXIO); |
|
931 |
} |
|
6423 | 932 |
if (zv->zv_flags & ZVOL_RDONLY || (zv->zv_mode & DS_MODE_READONLY)) { |
789 | 933 |
mutex_exit(&zvol_state_lock); |
934 |
return (EROFS); |
|
935 |
} |
|
936 |
||
937 |
tx = dmu_tx_create(zv->zv_objset); |
|
938 |
dmu_tx_hold_bonus(tx, ZVOL_OBJ); |
|
939 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
940 |
if (error) { |
|
941 |
dmu_tx_abort(tx); |
|
942 |
} else { |
|
943 |
error = dmu_object_set_blocksize(zv->zv_objset, ZVOL_OBJ, |
|
2676 | 944 |
volblocksize, 0, tx); |
789 | 945 |
if (error == ENOTSUP) |
946 |
error = EBUSY; |
|
947 |
dmu_tx_commit(tx); |
|
948 |
} |
|
949 |
||
950 |
mutex_exit(&zvol_state_lock); |
|
951 |
||
952 |
return (error); |
|
953 |
} |
|
954 |
||
955 |
/*ARGSUSED*/ |
|
956 |
int |
|
957 |
zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr) |
|
958 |
{ |
|
959 |
minor_t minor = getminor(*devp); |
|
960 |
zvol_state_t *zv; |
|
961 |
||
962 |
if (minor == 0) /* This is the control device */ |
|
963 |
return (0); |
|
964 |
||
965 |
mutex_enter(&zvol_state_lock); |
|
966 |
||
967 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
968 |
if (zv == NULL) { |
|
969 |
mutex_exit(&zvol_state_lock); |
|
970 |
return (ENXIO); |
|
971 |
} |
|
972 |
||
973 |
ASSERT(zv->zv_objset != NULL); |
|
974 |
||
975 |
if ((flag & FWRITE) && |
|
6423 | 976 |
(zv->zv_flags & ZVOL_RDONLY || (zv->zv_mode & DS_MODE_READONLY))) { |
789 | 977 |
mutex_exit(&zvol_state_lock); |
978 |
return (EROFS); |
|
979 |
} |
|
980 |
||
981 |
if (zv->zv_open_count[otyp] == 0 || otyp == OTYP_LYR) { |
|
982 |
zv->zv_open_count[otyp]++; |
|
983 |
zv->zv_total_opens++; |
|
984 |
} |
|
985 |
||
986 |
mutex_exit(&zvol_state_lock); |
|
987 |
||
988 |
return (0); |
|
989 |
} |
|
990 |
||
991 |
/*ARGSUSED*/ |
|
992 |
int |
|
993 |
zvol_close(dev_t dev, int flag, int otyp, cred_t *cr) |
|
994 |
{ |
|
995 |
minor_t minor = getminor(dev); |
|
996 |
zvol_state_t *zv; |
|
997 |
||
998 |
if (minor == 0) /* This is the control device */ |
|
999 |
return (0); |
|
1000 |
||
1001 |
mutex_enter(&zvol_state_lock); |
|
1002 |
||
1003 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
1004 |
if (zv == NULL) { |
|
1005 |
mutex_exit(&zvol_state_lock); |
|
1006 |
return (ENXIO); |
|
1007 |
} |
|
1008 |
||
1009 |
/* |
|
1010 |
* The next statement is a workaround for the following DDI bug: |
|
1011 |
* 6343604 specfs race: multiple "last-close" of the same device |
|
1012 |
*/ |
|
1013 |
if (zv->zv_total_opens == 0) { |
|
1014 |
mutex_exit(&zvol_state_lock); |
|
1015 |
return (0); |
|
1016 |
} |
|
1017 |
||
1018 |
/* |
|
1019 |
* If the open count is zero, this is a spurious close. |
|
1020 |
* That indicates a bug in the kernel / DDI framework. |
|
1021 |
*/ |
|
1022 |
ASSERT(zv->zv_open_count[otyp] != 0); |
|
1023 |
ASSERT(zv->zv_total_opens != 0); |
|
1024 |
||
1025 |
/* |
|
1026 |
* You may get multiple opens, but only one close. |
|
1027 |
*/ |
|
1028 |
zv->zv_open_count[otyp]--; |
|
1029 |
zv->zv_total_opens--; |
|
1030 |
||
1031 |
mutex_exit(&zvol_state_lock); |
|
1032 |
||
1033 |
return (0); |
|
1034 |
} |
|
1035 |
||
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1036 |
static void |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1037 |
zvol_get_done(dmu_buf_t *db, void *vzgd) |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1038 |
{ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1039 |
zgd_t *zgd = (zgd_t *)vzgd; |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1040 |
rl_t *rl = zgd->zgd_rl; |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1041 |
|
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1042 |
dmu_buf_rele(db, vzgd); |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1043 |
zfs_range_unlock(rl); |
5688
c0b02c8fd2c0
6640580 spa_get_random() is insanely slow in userland
bonwick
parents:
5331
diff
changeset
|
1044 |
zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1045 |
kmem_free(zgd, sizeof (zgd_t)); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1046 |
} |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1047 |
|
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1048 |
/* |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1049 |
* Get data to generate a TX_WRITE intent log record. |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1050 |
*/ |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1051 |
static int |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1052 |
zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1053 |
{ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1054 |
zvol_state_t *zv = arg; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1055 |
objset_t *os = zv->zv_objset; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1056 |
dmu_buf_t *db; |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1057 |
rl_t *rl; |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1058 |
zgd_t *zgd; |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1059 |
uint64_t boff; /* block starting offset */ |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1060 |
int dlen = lr->lr_length; /* length of user data */ |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1061 |
int error; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1062 |
|
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1063 |
ASSERT(zio); |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1064 |
ASSERT(dlen != 0); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1065 |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1066 |
/* |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1067 |
* Write records come in two flavors: immediate and indirect. |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1068 |
* For small writes it's cheaper to store the data with the |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1069 |
* log record (immediate); for large writes it's cheaper to |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1070 |
* sync the data and get a pointer to it (indirect) so that |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1071 |
* we don't have to write the data twice. |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1072 |
*/ |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1073 |
if (buf != NULL) /* immediate write */ |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1074 |
return (dmu_read(os, ZVOL_OBJ, lr->lr_offset, dlen, buf)); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1075 |
|
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1076 |
zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1077 |
zgd->zgd_zilog = zv->zv_zilog; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1078 |
zgd->zgd_bp = &lr->lr_blkptr; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1079 |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1080 |
/* |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1081 |
* Lock the range of the block to ensure that when the data is |
6423 | 1082 |
* written out and its checksum is being calculated that no other |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1083 |
* thread can change the block. |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1084 |
*/ |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1085 |
boff = P2ALIGN_TYPED(lr->lr_offset, zv->zv_volblocksize, uint64_t); |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1086 |
rl = zfs_range_lock(&zv->zv_znode, boff, zv->zv_volblocksize, |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1087 |
RL_READER); |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1088 |
zgd->zgd_rl = rl; |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1089 |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1090 |
VERIFY(0 == dmu_buf_hold(os, ZVOL_OBJ, lr->lr_offset, zgd, &db)); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1091 |
error = dmu_sync(zio, db, &lr->lr_blkptr, |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1092 |
lr->lr_common.lrc_txg, zvol_get_done, zgd); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1093 |
if (error == 0) |
5688
c0b02c8fd2c0
6640580 spa_get_random() is insanely slow in userland
bonwick
parents:
5331
diff
changeset
|
1094 |
zil_add_block(zv->zv_zilog, &lr->lr_blkptr); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1095 |
/* |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1096 |
* If we get EINPROGRESS, then we need to wait for a |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1097 |
* write IO initiated by dmu_sync() to complete before |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1098 |
* we can release this dbuf. We will finish everything |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1099 |
* up in the zvol_get_done() callback. |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1100 |
*/ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1101 |
if (error == EINPROGRESS) |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1102 |
return (0); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1103 |
dmu_buf_rele(db, zgd); |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1104 |
zfs_range_unlock(rl); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1105 |
kmem_free(zgd, sizeof (zgd_t)); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1106 |
return (error); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1107 |
} |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1108 |
|
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1109 |
/* |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1110 |
* zvol_log_write() handles synchronous writes using TX_WRITE ZIL transactions. |
1141 | 1111 |
* |
1112 |
* We store data in the log buffers if it's small enough. |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1113 |
* Otherwise we will later flush the data out via dmu_sync(). |
1141 | 1114 |
*/ |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1115 |
ssize_t zvol_immediate_write_sz = 32768; |
1141 | 1116 |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1117 |
static void |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1118 |
zvol_log_write(zvol_state_t *zv, dmu_tx_t *tx, offset_t off, ssize_t len) |
1141 | 1119 |
{ |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1120 |
uint32_t blocksize = zv->zv_volblocksize; |
1141 | 1121 |
lr_write_t *lr; |
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1122 |
|
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1123 |
while (len) { |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1124 |
ssize_t nbytes = MIN(len, blocksize - P2PHASE(off, blocksize)); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1125 |
itx_t *itx = zil_itx_create(TX_WRITE, sizeof (*lr)); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1126 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1127 |
itx->itx_wr_state = |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1128 |
len > zvol_immediate_write_sz ? WR_INDIRECT : WR_NEED_COPY; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1129 |
itx->itx_private = zv; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1130 |
lr = (lr_write_t *)&itx->itx_lr; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1131 |
lr->lr_foid = ZVOL_OBJ; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1132 |
lr->lr_offset = off; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1133 |
lr->lr_length = nbytes; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1134 |
lr->lr_blkoff = off - P2ALIGN_TYPED(off, blocksize, uint64_t); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1135 |
BP_ZERO(&lr->lr_blkptr); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1136 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1137 |
(void) zil_itx_assign(zv->zv_zilog, itx, tx); |
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1138 |
len -= nbytes; |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1139 |
off += nbytes; |
1141 | 1140 |
} |
1141 |
} |
|
1142 |
||
789 | 1143 |
int |
6423 | 1144 |
zvol_dumpio(vdev_t *vd, uint64_t size, uint64_t offset, void *addr, |
1145 |
int bflags, int isdump) |
|
1146 |
{ |
|
1147 |
vdev_disk_t *dvd; |
|
1148 |
int direction; |
|
1149 |
int c; |
|
1150 |
int numerrors = 0; |
|
1151 |
||
1152 |
for (c = 0; c < vd->vdev_children; c++) { |
|
1153 |
if (zvol_dumpio(vd->vdev_child[c], size, offset, |
|
1154 |
addr, bflags, isdump) != 0) { |
|
1155 |
numerrors++; |
|
1156 |
} else if (bflags & B_READ) { |
|
1157 |
break; |
|
1158 |
} |
|
1159 |
} |
|
1160 |
||
1161 |
if (!vd->vdev_ops->vdev_op_leaf) |
|
1162 |
return (numerrors < vd->vdev_children ? 0 : EIO); |
|
1163 |
||
1164 |
if (!vdev_writeable(vd)) |
|
1165 |
return (EIO); |
|
1166 |
||
1167 |
dvd = vd->vdev_tsd; |
|
1168 |
ASSERT3P(dvd, !=, NULL); |
|
1169 |
direction = bflags & (B_WRITE | B_READ); |
|
1170 |
ASSERT(ISP2(direction)); |
|
1171 |
offset += VDEV_LABEL_START_SIZE; |
|
1172 |
||
1173 |
if (ddi_in_panic() || isdump) { |
|
1174 |
if (direction & B_READ) |
|
1175 |
return (EIO); |
|
1176 |
return (ldi_dump(dvd->vd_lh, addr, lbtodb(offset), |
|
1177 |
lbtodb(size))); |
|
1178 |
} else { |
|
1179 |
return (vdev_disk_physio(dvd->vd_lh, addr, size, offset, |
|
1180 |
direction)); |
|
1181 |
} |
|
1182 |
} |
|
1183 |
||
1184 |
int |
|
1185 |
zvol_physio(zvol_state_t *zv, int bflags, uint64_t off, |
|
1186 |
uint64_t size, void *addr, int isdump) |
|
1187 |
{ |
|
1188 |
dva_t dva; |
|
1189 |
vdev_t *vd; |
|
1190 |
int error; |
|
1191 |
spa_t *spa = dmu_objset_spa(zv->zv_objset); |
|
1192 |
||
1193 |
ASSERT(size <= zv->zv_volblocksize); |
|
1194 |
||
1195 |
/* restrict requests to multiples of the system block size */ |
|
1196 |
if (P2PHASE(off, DEV_BSIZE) || P2PHASE(size, DEV_BSIZE)) |
|
1197 |
return (EINVAL); |
|
1198 |
||
1199 |
if (zvol_get_dva(zv, off, &dva) != 0) |
|
1200 |
return (EIO); |
|
1201 |
||
1202 |
spa_config_enter(spa, RW_READER, FTAG); |
|
1203 |
vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva)); |
|
1204 |
||
1205 |
error = zvol_dumpio(vd, size, |
|
1206 |
DVA_GET_OFFSET(&dva) + (off % zv->zv_volblocksize), |
|
1207 |
addr, bflags & (B_READ | B_WRITE | B_PHYS), isdump); |
|
1208 |
||
1209 |
spa_config_exit(spa, FTAG); |
|
1210 |
return (error); |
|
1211 |
} |
|
1212 |
||
1213 |
int |
|
789 | 1214 |
zvol_strategy(buf_t *bp) |
1215 |
{ |
|
1216 |
zvol_state_t *zv = ddi_get_soft_state(zvol_state, getminor(bp->b_edev)); |
|
1217 |
uint64_t off, volsize; |
|
1218 |
size_t size, resid; |
|
1219 |
char *addr; |
|
1141 | 1220 |
objset_t *os; |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1221 |
rl_t *rl; |
789 | 1222 |
int error = 0; |
6423 | 1223 |
boolean_t reading, is_dump = zv->zv_flags & ZVOL_DUMPIFIED; |
789 | 1224 |
|
1225 |
if (zv == NULL) { |
|
1226 |
bioerror(bp, ENXIO); |
|
1227 |
biodone(bp); |
|
1228 |
return (0); |
|
1229 |
} |
|
1230 |
||
1231 |
if (getminor(bp->b_edev) == 0) { |
|
1232 |
bioerror(bp, EINVAL); |
|
1233 |
biodone(bp); |
|
1234 |
return (0); |
|
1235 |
} |
|
1236 |
||
6423 | 1237 |
if (!(bp->b_flags & B_READ) && |
1238 |
(zv->zv_flags & ZVOL_RDONLY || |
|
1239 |
zv->zv_mode & DS_MODE_READONLY)) { |
|
789 | 1240 |
bioerror(bp, EROFS); |
1241 |
biodone(bp); |
|
1242 |
return (0); |
|
1243 |
} |
|
1244 |
||
1245 |
off = ldbtob(bp->b_blkno); |
|
1246 |
volsize = zv->zv_volsize; |
|
1247 |
||
1141 | 1248 |
os = zv->zv_objset; |
1249 |
ASSERT(os != NULL); |
|
789 | 1250 |
|
1251 |
bp_mapin(bp); |
|
1252 |
addr = bp->b_un.b_addr; |
|
1253 |
resid = bp->b_bcount; |
|
1254 |
||
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1255 |
/* |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1256 |
* There must be no buffer changes when doing a dmu_sync() because |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1257 |
* we can't change the data whilst calculating the checksum. |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1258 |
*/ |
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1259 |
reading = bp->b_flags & B_READ; |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1260 |
rl = zfs_range_lock(&zv->zv_znode, off, resid, |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1261 |
reading ? RL_READER : RL_WRITER); |
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1262 |
|
6423 | 1263 |
if (resid > volsize - off) /* don't write past the end */ |
1264 |
resid = volsize - off; |
|
1265 |
||
789 | 1266 |
while (resid != 0 && off < volsize) { |
1267 |
||
6423 | 1268 |
size = MIN(resid, zvol_maxphys); |
1269 |
if (is_dump) { |
|
1270 |
/* can't straddle a block boundary */ |
|
1271 |
size = MIN(size, P2END(off, zv->zv_volblocksize) - off); |
|
1272 |
error = zvol_physio(zv, bp->b_flags, off, size, |
|
1273 |
addr, 0); |
|
1274 |
} else if (reading) { |
|
1861
7929434f26fb
6413125 zvol_strategy() race can lead to on-disk corruption.
perrin
parents:
1669
diff
changeset
|
1275 |
error = dmu_read(os, ZVOL_OBJ, off, size, addr); |
789 | 1276 |
} else { |
1141 | 1277 |
dmu_tx_t *tx = dmu_tx_create(os); |
789 | 1278 |
dmu_tx_hold_write(tx, ZVOL_OBJ, off, size); |
1279 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
1280 |
if (error) { |
|
1281 |
dmu_tx_abort(tx); |
|
1282 |
} else { |
|
1141 | 1283 |
dmu_write(os, ZVOL_OBJ, off, size, addr, tx); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1284 |
zvol_log_write(zv, tx, off, size); |
789 | 1285 |
dmu_tx_commit(tx); |
1286 |
} |
|
1287 |
} |
|
1288 |
if (error) |
|
1289 |
break; |
|
1290 |
off += size; |
|
1291 |
addr += size; |
|
1292 |
resid -= size; |
|
1293 |
} |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1294 |
zfs_range_unlock(rl); |
789 | 1295 |
|
1296 |
if ((bp->b_resid = resid) == bp->b_bcount) |
|
1297 |
bioerror(bp, off > volsize ? EINVAL : error); |
|
1298 |
||
6423 | 1299 |
if (!(bp->b_flags & B_ASYNC) && !reading && !zil_disable && !is_dump) |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1300 |
zil_commit(zv->zv_zilog, UINT64_MAX, ZVOL_OBJ); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1301 |
biodone(bp); |
1141 | 1302 |
|
789 | 1303 |
return (0); |
1304 |
} |
|
1305 |
||
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1306 |
/* |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1307 |
* Set the buffer count to the zvol maximum transfer. |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1308 |
* Using our own routine instead of the default minphys() |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1309 |
* means that for larger writes we write bigger buffers on X86 |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1310 |
* (128K instead of 56K) and flush the disk write cache less often |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1311 |
* (every zvol_maxphys - currently 1MB) instead of minphys (currently |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1312 |
* 56K on X86 and 128K on sparc). |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1313 |
*/ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1314 |
void |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1315 |
zvol_minphys(struct buf *bp) |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1316 |
{ |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1317 |
if (bp->b_bcount > zvol_maxphys) |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1318 |
bp->b_bcount = zvol_maxphys; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1319 |
} |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
3016
diff
changeset
|
1320 |
|
6423 | 1321 |
int |
1322 |
zvol_dump(dev_t dev, caddr_t addr, daddr_t blkno, int nblocks) |
|
1323 |
{ |
|
1324 |
minor_t minor = getminor(dev); |
|
1325 |
zvol_state_t *zv; |
|
1326 |
int error = 0; |
|
1327 |
uint64_t size; |
|
1328 |
uint64_t boff; |
|
1329 |
uint64_t resid; |
|
1330 |
||
1331 |
if (minor == 0) /* This is the control device */ |
|
1332 |
return (ENXIO); |
|
1333 |
||
1334 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
1335 |
if (zv == NULL) |
|
1336 |
return (ENXIO); |
|
1337 |
||
1338 |
boff = ldbtob(blkno); |
|
1339 |
resid = ldbtob(nblocks); |
|
1340 |
if (boff + resid > zv->zv_volsize) { |
|
1341 |
/* dump should know better than to write here */ |
|
1342 |
ASSERT(blkno + resid <= zv->zv_volsize); |
|
1343 |
return (EIO); |
|
1344 |
} |
|
1345 |
while (resid) { |
|
1346 |
/* can't straddle a block boundary */ |
|
1347 |
size = MIN(resid, P2END(boff, zv->zv_volblocksize) - boff); |
|
1348 |
||
1349 |
error = zvol_physio(zv, B_WRITE, boff, size, addr, 1); |
|
1350 |
if (error) |
|
1351 |
break; |
|
1352 |
boff += size; |
|
1353 |
addr += size; |
|
1354 |
resid -= size; |
|
1355 |
} |
|
1356 |
||
1357 |
return (error); |
|
1358 |
} |
|
1359 |
||
789 | 1360 |
/*ARGSUSED*/ |
1361 |
int |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1362 |
zvol_read(dev_t dev, uio_t *uio, cred_t *cr) |
789 | 1363 |
{ |
4107 | 1364 |
minor_t minor = getminor(dev); |
1365 |
zvol_state_t *zv; |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1366 |
rl_t *rl; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1367 |
int error = 0; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1368 |
|
4107 | 1369 |
if (minor == 0) /* This is the control device */ |
1370 |
return (ENXIO); |
|
1371 |
||
1372 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
1373 |
if (zv == NULL) |
|
1374 |
return (ENXIO); |
|
1375 |
||
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1376 |
rl = zfs_range_lock(&zv->zv_znode, uio->uio_loffset, uio->uio_resid, |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1377 |
RL_READER); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1378 |
while (uio->uio_resid > 0) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1379 |
uint64_t bytes = MIN(uio->uio_resid, DMU_MAX_ACCESS >> 1); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1380 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1381 |
error = dmu_read_uio(zv->zv_objset, ZVOL_OBJ, uio, bytes); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1382 |
if (error) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1383 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1384 |
} |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1385 |
zfs_range_unlock(rl); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1386 |
return (error); |
789 | 1387 |
} |
1388 |
||
1389 |
/*ARGSUSED*/ |
|
1390 |
int |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1391 |
zvol_write(dev_t dev, uio_t *uio, cred_t *cr) |
789 | 1392 |
{ |
4107 | 1393 |
minor_t minor = getminor(dev); |
1394 |
zvol_state_t *zv; |
|
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1395 |
rl_t *rl; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1396 |
int error = 0; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1397 |
|
4107 | 1398 |
if (minor == 0) /* This is the control device */ |
1399 |
return (ENXIO); |
|
1400 |
||
1401 |
zv = ddi_get_soft_state(zvol_state, minor); |
|
1402 |
if (zv == NULL) |
|
1403 |
return (ENXIO); |
|
1404 |
||
6423 | 1405 |
if (zv->zv_flags & ZVOL_DUMPIFIED) { |
1406 |
error = physio(zvol_strategy, NULL, dev, B_WRITE, |
|
1407 |
zvol_minphys, uio); |
|
1408 |
return (error); |
|
1409 |
} |
|
1410 |
||
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1411 |
rl = zfs_range_lock(&zv->zv_znode, uio->uio_loffset, uio->uio_resid, |
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1412 |
RL_WRITER); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1413 |
while (uio->uio_resid > 0) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1414 |
uint64_t bytes = MIN(uio->uio_resid, DMU_MAX_ACCESS >> 1); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1415 |
uint64_t off = uio->uio_loffset; |
789 | 1416 |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1417 |
dmu_tx_t *tx = dmu_tx_create(zv->zv_objset); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1418 |
dmu_tx_hold_write(tx, ZVOL_OBJ, off, bytes); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1419 |
error = dmu_tx_assign(tx, TXG_WAIT); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1420 |
if (error) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1421 |
dmu_tx_abort(tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1422 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1423 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1424 |
error = dmu_write_uio(zv->zv_objset, ZVOL_OBJ, uio, bytes, tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1425 |
if (error == 0) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1426 |
zvol_log_write(zv, tx, off, bytes); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1427 |
dmu_tx_commit(tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1428 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1429 |
if (error) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1430 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1431 |
} |
3755
8708c35cb823
6525008 panic: dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC, file: ../../common/fs/zfs/dbuf.c, line: 676
perrin
parents:
3638
diff
changeset
|
1432 |
zfs_range_unlock(rl); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1433 |
return (error); |
789 | 1434 |
} |
1435 |
||
1436 |
/* |
|
1437 |
* Dirtbag ioctls to support mkfs(1M) for UFS filesystems. See dkio(7I). |
|
1438 |
*/ |
|
1439 |
/*ARGSUSED*/ |
|
1440 |
int |
|
1441 |
zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp) |
|
1442 |
{ |
|
1443 |
zvol_state_t *zv; |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1444 |
struct dk_cinfo dki; |
789 | 1445 |
struct dk_minfo dkm; |
1446 |
dk_efi_t efi; |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1447 |
struct dk_callback *dkc; |
789 | 1448 |
struct uuid uuid = EFI_RESERVED; |
1449 |
uint32_t crc; |
|
1450 |
int error = 0; |
|
6423 | 1451 |
rl_t *rl; |
789 | 1452 |
|
1453 |
mutex_enter(&zvol_state_lock); |
|
1454 |
||
1455 |
zv = ddi_get_soft_state(zvol_state, getminor(dev)); |
|
1456 |
||
1457 |
if (zv == NULL) { |
|
1458 |
mutex_exit(&zvol_state_lock); |
|
1459 |
return (ENXIO); |
|
1460 |
} |
|
1461 |
||
1462 |
switch (cmd) { |
|
1463 |
||
1464 |
case DKIOCINFO: |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1465 |
bzero(&dki, sizeof (dki)); |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1466 |
(void) strcpy(dki.dki_cname, "zvol"); |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1467 |
(void) strcpy(dki.dki_dname, "zvol"); |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1468 |
dki.dki_ctype = DKC_UNKNOWN; |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1469 |
dki.dki_maxtransfer = 1 << (SPA_MAXBLOCKSHIFT - zv->zv_min_bs); |
789 | 1470 |
mutex_exit(&zvol_state_lock); |
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1471 |
if (ddi_copyout(&dki, (void *)arg, sizeof (dki), flag)) |
789 | 1472 |
error = EFAULT; |
1473 |
return (error); |
|
1474 |
||
1475 |
case DKIOCGMEDIAINFO: |
|
1476 |
bzero(&dkm, sizeof (dkm)); |
|
1477 |
dkm.dki_lbsize = 1U << zv->zv_min_bs; |
|
1478 |
dkm.dki_capacity = zv->zv_volsize >> zv->zv_min_bs; |
|
1479 |
dkm.dki_media_type = DK_UNKNOWN; |
|
1480 |
mutex_exit(&zvol_state_lock); |
|
1481 |
if (ddi_copyout(&dkm, (void *)arg, sizeof (dkm), flag)) |
|
1482 |
error = EFAULT; |
|
1483 |
return (error); |
|
1484 |
||
1485 |
case DKIOCGETEFI: |
|
1486 |
if (ddi_copyin((void *)arg, &efi, sizeof (dk_efi_t), flag)) { |
|
1487 |
mutex_exit(&zvol_state_lock); |
|
1488 |
return (EFAULT); |
|
1489 |
} |
|
1490 |
efi.dki_data = (void *)(uintptr_t)efi.dki_data_64; |
|
1491 |
||
3016 | 1492 |
/* |
1493 |
* Some clients may attempt to request a PMBR for the |
|
1494 |
* zvol. Currently this interface will return ENOTTY to |
|
1495 |
* such requests. These requests could be supported by |
|
1496 |
* adding a check for lba == 0 and consing up an appropriate |
|
6423 | 1497 |
* PMBR. |
3016 | 1498 |
*/ |
1499 |
if (efi.dki_lba == 1) { |
|
1500 |
efi_gpt_t gpt; |
|
1501 |
efi_gpe_t gpe; |
|
1502 |
||
1503 |
bzero(&gpt, sizeof (gpt)); |
|
1504 |
bzero(&gpe, sizeof (gpe)); |
|
789 | 1505 |
|
3016 | 1506 |
if (efi.dki_length < sizeof (gpt)) { |
1507 |
mutex_exit(&zvol_state_lock); |
|
1508 |
return (EINVAL); |
|
1509 |
} |
|
1510 |
||
1511 |
gpt.efi_gpt_Signature = LE_64(EFI_SIGNATURE); |
|
1512 |
gpt.efi_gpt_Revision = LE_32(EFI_VERSION_CURRENT); |
|
1513 |
gpt.efi_gpt_HeaderSize = LE_32(sizeof (gpt)); |
|
1514 |
gpt.efi_gpt_FirstUsableLBA = LE_64(34ULL); |
|
1515 |
gpt.efi_gpt_LastUsableLBA = |
|
1516 |
LE_64((zv->zv_volsize >> zv->zv_min_bs) - 1); |
|
1517 |
gpt.efi_gpt_NumberOfPartitionEntries = LE_32(1); |
|
3080
deef42200cee
6490291 Unable to newfs zvols, returns exit code of 32.
maybee
parents:
3063
diff
changeset
|
1518 |
gpt.efi_gpt_PartitionEntryLBA = LE_64(2ULL); |
3016 | 1519 |
gpt.efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (gpe)); |
789 | 1520 |
|
3016 | 1521 |
UUID_LE_CONVERT(gpe.efi_gpe_PartitionTypeGUID, uuid); |
1522 |
gpe.efi_gpe_StartingLBA = gpt.efi_gpt_FirstUsableLBA; |
|
1523 |
gpe.efi_gpe_EndingLBA = gpt.efi_gpt_LastUsableLBA; |
|
1524 |
||
1525 |
CRC32(crc, &gpe, sizeof (gpe), -1U, crc32_table); |
|
1526 |
gpt.efi_gpt_PartitionEntryArrayCRC32 = LE_32(~crc); |
|
1527 |
||
1528 |
CRC32(crc, &gpt, sizeof (gpt), -1U, crc32_table); |
|
1529 |
gpt.efi_gpt_HeaderCRC32 = LE_32(~crc); |
|
1530 |
||
1531 |
mutex_exit(&zvol_state_lock); |
|
1532 |
if (ddi_copyout(&gpt, efi.dki_data, sizeof (gpt), flag)) |
|
1533 |
error = EFAULT; |
|
1534 |
} else if (efi.dki_lba == 2) { |
|
1535 |
efi_gpe_t gpe; |
|
1536 |
||
1537 |
bzero(&gpe, sizeof (gpe)); |
|
789 | 1538 |
|
3016 | 1539 |
if (efi.dki_length < sizeof (gpe)) { |
1540 |
mutex_exit(&zvol_state_lock); |
|
1541 |
return (EINVAL); |
|
1542 |
} |
|
789 | 1543 |
|
3016 | 1544 |
UUID_LE_CONVERT(gpe.efi_gpe_PartitionTypeGUID, uuid); |
1545 |
gpe.efi_gpe_StartingLBA = LE_64(34ULL); |
|
1546 |
gpe.efi_gpe_EndingLBA = |
|
1547 |
LE_64((zv->zv_volsize >> zv->zv_min_bs) - 1); |
|
789 | 1548 |
|
3016 | 1549 |
mutex_exit(&zvol_state_lock); |
1550 |
if (ddi_copyout(&gpe, efi.dki_data, sizeof (gpe), flag)) |
|
1551 |
error = EFAULT; |
|
1552 |
} else { |
|
1553 |
mutex_exit(&zvol_state_lock); |
|
1554 |
error = EINVAL; |
|
1555 |
} |
|
789 | 1556 |
return (error); |
1557 |
||
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1558 |
case DKIOCFLUSHWRITECACHE: |
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1559 |
dkc = (struct dk_callback *)arg; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1560 |
zil_commit(zv->zv_zilog, UINT64_MAX, ZVOL_OBJ); |
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1561 |
if ((flag & FKIOCTL) && dkc != NULL && dkc->dkc_callback) { |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1562 |
(*dkc->dkc_callback)(dkc->dkc_cookie, error); |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1563 |
error = 0; |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3755
diff
changeset
|
1564 |
} |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1565 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
1566 |
|
3245
0c86ad4b2673
6493634 zvol should return ENOTSUP on DKIOCGVTOC ioctl
maybee
parents:
3080
diff
changeset
|
1567 |
case DKIOCGGEOM: |
0c86ad4b2673
6493634 zvol should return ENOTSUP on DKIOCGVTOC ioctl
maybee
parents:
3080
diff
changeset
|
1568 |
case DKIOCGVTOC: |
6423 | 1569 |
/* |
1570 |
* commands using these (like prtvtoc) expect ENOTSUP |
|
1571 |
* since we're emulating an EFI label |
|
1572 |
*/ |
|
3245
0c86ad4b2673
6493634 zvol should return ENOTSUP on DKIOCGVTOC ioctl
maybee
parents:
3080
diff
changeset
|
1573 |
error = ENOTSUP; |
0c86ad4b2673
6493634 zvol should return ENOTSUP on DKIOCGVTOC ioctl
maybee
parents:
3080
diff
changeset
|
1574 |
break; |
0c86ad4b2673
6493634 zvol should return ENOTSUP on DKIOCGVTOC ioctl
maybee
parents:
3080
diff
changeset
|
1575 |
|
6423 | 1576 |
case DKIOCDUMPINIT: |
1577 |
rl = zfs_range_lock(&zv->zv_znode, 0, zv->zv_volsize, |
|
1578 |
RL_WRITER); |
|
1579 |
error = zvol_dumpify(zv); |
|
1580 |
zfs_range_unlock(rl); |
|
1581 |
break; |
|
1582 |
||
1583 |
case DKIOCDUMPFINI: |
|
1584 |
rl = zfs_range_lock(&zv->zv_znode, 0, zv->zv_volsize, |
|
1585 |
RL_WRITER); |
|
1586 |
error = zvol_dump_fini(zv); |
|
1587 |
zfs_range_unlock(rl); |
|
1588 |
break; |
|
1589 |
||
789 | 1590 |
default: |
3016 | 1591 |
error = ENOTTY; |
789 | 1592 |
break; |
1593 |
||
1594 |
} |
|
1595 |
mutex_exit(&zvol_state_lock); |
|
1596 |
return (error); |
|
1597 |
} |
|
1598 |
||
1599 |
int |
|
1600 |
zvol_busy(void) |
|
1601 |
{ |
|
1602 |
return (zvol_minors != 0); |
|
1603 |
} |
|
1604 |
||
1605 |
void |
|
1606 |
zvol_init(void) |
|
1607 |
{ |
|
1608 |
VERIFY(ddi_soft_state_init(&zvol_state, sizeof (zvol_state_t), 1) == 0); |
|
1609 |
mutex_init(&zvol_state_lock, NULL, MUTEX_DEFAULT, NULL); |
|
1610 |
} |
|
1611 |
||
1612 |
void |
|
1613 |
zvol_fini(void) |
|
1614 |
{ |
|
1615 |
mutex_destroy(&zvol_state_lock); |
|
1616 |
ddi_soft_state_fini(&zvol_state); |
|
1617 |
} |
|
6423 | 1618 |
|
1619 |
static boolean_t |
|
1620 |
zvol_is_swap(zvol_state_t *zv) |
|
1621 |
{ |
|
1622 |
vnode_t *vp; |
|
1623 |
boolean_t ret = B_FALSE; |
|
1624 |
char *devpath; |
|
1625 |
size_t devpathlen; |
|
1626 |
int error; |
|
1627 |
||
1628 |
devpathlen = strlen(ZVOL_FULL_DEV_DIR) + strlen(zv->zv_name) + 1; |
|
1629 |
devpath = kmem_alloc(devpathlen, KM_SLEEP); |
|
1630 |
(void) sprintf(devpath, "%s%s", ZVOL_FULL_DEV_DIR, zv->zv_name); |
|
1631 |
error = lookupname(devpath, UIO_SYSSPACE, FOLLOW, NULLVPP, &vp); |
|
1632 |
kmem_free(devpath, devpathlen); |
|
1633 |
||
1634 |
ret = !error && IS_SWAPVP(common_specvp(vp)); |
|
1635 |
||
1636 |
if (vp != NULL) |
|
1637 |
VN_RELE(vp); |
|
1638 |
||
1639 |
return (ret); |
|
1640 |
} |
|
1641 |
||
1642 |
static int |
|
1643 |
zvol_dump_init(zvol_state_t *zv, boolean_t resize) |
|
1644 |
{ |
|
1645 |
dmu_tx_t *tx; |
|
1646 |
int error = 0; |
|
1647 |
objset_t *os = zv->zv_objset; |
|
1648 |
nvlist_t *nv = NULL; |
|
1649 |
uint64_t checksum, compress, refresrv; |
|
1650 |
||
1651 |
ASSERT(MUTEX_HELD(&zvol_state_lock)); |
|
1652 |
||
1653 |
tx = dmu_tx_create(os); |
|
1654 |
dmu_tx_hold_free(tx, ZVOL_OBJ, 0, DMU_OBJECT_END); |
|
1655 |
dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL); |
|
1656 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
1657 |
if (error) { |
|
1658 |
dmu_tx_abort(tx); |
|
1659 |
return (error); |
|
1660 |
} |
|
1661 |
||
1662 |
/* |
|
1663 |
* If we are resizing the dump device then we only need to |
|
1664 |
* update the refreservation to match the newly updated |
|
1665 |
* zvolsize. Otherwise, we save off the original state of the |
|
1666 |
* zvol so that we can restore them if the zvol is ever undumpified. |
|
1667 |
*/ |
|
1668 |
if (resize) { |
|
1669 |
error = zap_update(os, ZVOL_ZAP_OBJ, |
|
1670 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1, |
|
1671 |
&zv->zv_volsize, tx); |
|
1672 |
} else { |
|
1673 |
error = dsl_prop_get_integer(zv->zv_name, |
|
1674 |
zfs_prop_to_name(ZFS_PROP_COMPRESSION), &compress, NULL); |
|
1675 |
error = error ? error : dsl_prop_get_integer(zv->zv_name, |
|
1676 |
zfs_prop_to_name(ZFS_PROP_CHECKSUM), &checksum, NULL); |
|
1677 |
error = error ? error : dsl_prop_get_integer(zv->zv_name, |
|
1678 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &refresrv, NULL); |
|
1679 |
||
1680 |
error = error ? error : zap_update(os, ZVOL_ZAP_OBJ, |
|
1681 |
zfs_prop_to_name(ZFS_PROP_COMPRESSION), 8, 1, |
|
1682 |
&compress, tx); |
|
1683 |
error = error ? error : zap_update(os, ZVOL_ZAP_OBJ, |
|
1684 |
zfs_prop_to_name(ZFS_PROP_CHECKSUM), 8, 1, &checksum, tx); |
|
1685 |
error = error ? error : zap_update(os, ZVOL_ZAP_OBJ, |
|
1686 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1, |
|
1687 |
&refresrv, tx); |
|
1688 |
} |
|
1689 |
dmu_tx_commit(tx); |
|
1690 |
||
1691 |
/* Truncate the file */ |
|
1692 |
if (!error) |
|
1693 |
error = zvol_truncate(zv, 0, DMU_OBJECT_END); |
|
1694 |
||
1695 |
if (error) |
|
1696 |
return (error); |
|
1697 |
||
1698 |
/* |
|
1699 |
* We only need update the zvol's property if we are initializing |
|
1700 |
* the dump area for the first time. |
|
1701 |
*/ |
|
1702 |
if (!resize) { |
|
1703 |
VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
|
1704 |
VERIFY(nvlist_add_uint64(nv, |
|
1705 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 0) == 0); |
|
1706 |
VERIFY(nvlist_add_uint64(nv, |
|
1707 |
zfs_prop_to_name(ZFS_PROP_COMPRESSION), |
|
1708 |
ZIO_COMPRESS_OFF) == 0); |
|
1709 |
VERIFY(nvlist_add_uint64(nv, |
|
1710 |
zfs_prop_to_name(ZFS_PROP_CHECKSUM), |
|
1711 |
ZIO_CHECKSUM_OFF) == 0); |
|
1712 |
||
1713 |
error = zfs_set_prop_nvlist(zv->zv_name, nv); |
|
1714 |
nvlist_free(nv); |
|
1715 |
||
1716 |
if (error) |
|
1717 |
return (error); |
|
1718 |
} |
|
1719 |
||
1720 |
/* Allocate the space for the dump */ |
|
1721 |
error = zvol_prealloc(zv); |
|
1722 |
return (error); |
|
1723 |
} |
|
1724 |
||
1725 |
static int |
|
1726 |
zvol_dumpify(zvol_state_t *zv) |
|
1727 |
{ |
|
1728 |
int error = 0; |
|
1729 |
uint64_t dumpsize = 0; |
|
1730 |
dmu_tx_t *tx; |
|
1731 |
objset_t *os = zv->zv_objset; |
|
1732 |
||
1733 |
if (zv->zv_flags & ZVOL_RDONLY || (zv->zv_mode & DS_MODE_READONLY)) |
|
1734 |
return (EROFS); |
|
1735 |
||
1736 |
/* |
|
1737 |
* We do not support swap devices acting as dump devices. |
|
1738 |
*/ |
|
1739 |
if (zvol_is_swap(zv)) |
|
1740 |
return (ENOTSUP); |
|
1741 |
||
1742 |
if (zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE, |
|
1743 |
8, 1, &dumpsize) != 0 || dumpsize != zv->zv_volsize) { |
|
1744 |
boolean_t resize = (dumpsize > 0) ? B_TRUE : B_FALSE; |
|
1745 |
||
1746 |
if ((error = zvol_dump_init(zv, resize)) != 0) { |
|
1747 |
(void) zvol_dump_fini(zv); |
|
1748 |
return (error); |
|
1749 |
} |
|
1750 |
} |
|
1751 |
||
1752 |
/* |
|
1753 |
* Build up our lba mapping. |
|
1754 |
*/ |
|
1755 |
error = zvol_get_lbas(zv); |
|
1756 |
if (error) { |
|
1757 |
(void) zvol_dump_fini(zv); |
|
1758 |
return (error); |
|
1759 |
} |
|
1760 |
||
1761 |
tx = dmu_tx_create(os); |
|
1762 |
dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL); |
|
1763 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
1764 |
if (error) { |
|
1765 |
dmu_tx_abort(tx); |
|
1766 |
(void) zvol_dump_fini(zv); |
|
1767 |
return (error); |
|
1768 |
} |
|
1769 |
||
1770 |
zv->zv_flags |= ZVOL_DUMPIFIED; |
|
1771 |
error = zap_update(os, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE, 8, 1, |
|
1772 |
&zv->zv_volsize, tx); |
|
1773 |
dmu_tx_commit(tx); |
|
1774 |
||
1775 |
if (error) { |
|
1776 |
(void) zvol_dump_fini(zv); |
|
1777 |
return (error); |
|
1778 |
} |
|
1779 |
||
1780 |
txg_wait_synced(dmu_objset_pool(os), 0); |
|
1781 |
return (0); |
|
1782 |
} |
|
1783 |
||
1784 |
static int |
|
1785 |
zvol_dump_fini(zvol_state_t *zv) |
|
1786 |
{ |
|
1787 |
dmu_tx_t *tx; |
|
1788 |
objset_t *os = zv->zv_objset; |
|
1789 |
nvlist_t *nv; |
|
1790 |
int error = 0; |
|
1791 |
uint64_t checksum, compress, refresrv; |
|
1792 |
||
1793 |
tx = dmu_tx_create(os); |
|
1794 |
dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL); |
|
1795 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
1796 |
if (error) { |
|
1797 |
dmu_tx_abort(tx); |
|
1798 |
return (error); |
|
1799 |
} |
|
1800 |
||
1801 |
/* |
|
1802 |
* Attempt to restore the zvol back to its pre-dumpified state. |
|
1803 |
* This is a best-effort attempt as it's possible that not all |
|
1804 |
* of these properties were initialized during the dumpify process |
|
1805 |
* (i.e. error during zvol_dump_init). |
|
1806 |
*/ |
|
1807 |
(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, |
|
1808 |
zfs_prop_to_name(ZFS_PROP_CHECKSUM), 8, 1, &checksum); |
|
1809 |
(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, |
|
1810 |
zfs_prop_to_name(ZFS_PROP_COMPRESSION), 8, 1, &compress); |
|
1811 |
(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, |
|
1812 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1, &refresrv); |
|
1813 |
||
1814 |
(void) zap_remove(os, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE, tx); |
|
1815 |
zvol_free_extents(zv); |
|
1816 |
zv->zv_flags &= ~ZVOL_DUMPIFIED; |
|
1817 |
dmu_tx_commit(tx); |
|
1818 |
||
1819 |
VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
|
1820 |
(void) nvlist_add_uint64(nv, |
|
1821 |
zfs_prop_to_name(ZFS_PROP_CHECKSUM), checksum); |
|
1822 |
(void) nvlist_add_uint64(nv, |
|
1823 |
zfs_prop_to_name(ZFS_PROP_COMPRESSION), compress); |
|
1824 |
(void) nvlist_add_uint64(nv, |
|
1825 |
zfs_prop_to_name(ZFS_PROP_REFRESERVATION), refresrv); |
|
1826 |
(void) zfs_set_prop_nvlist(zv->zv_name, nv); |
|
1827 |
nvlist_free(nv); |
|
1828 |
||
1829 |
return (0); |
|
1830 |
} |