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FITS: generating send-streams in portable format
This commit adds the command 'zfs fits-send', analogous to zfs send. The
generated send stream is compatible with the stream generated with that
from 'btrfs send' and can in principle easily be received to any filesystem.
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--- old/usr/src/uts/common/fs/zfs/zfs_ioctl.c
+++ new/usr/src/uts/common/fs/zfs/zfs_ioctl.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Portions Copyright 2011 Martin Matuska
25 25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 27 * Copyright (c) 2012 by Delphix. All rights reserved.
28 28 */
29 29
30 30 /*
31 31 * ZFS ioctls.
32 32 *
33 33 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
34 34 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
35 35 *
36 36 * There are two ways that we handle ioctls: the legacy way where almost
37 37 * all of the logic is in the ioctl callback, and the new way where most
38 38 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
39 39 *
40 40 * Non-legacy ioctls should be registered by calling
41 41 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
42 42 * from userland by lzc_ioctl().
43 43 *
44 44 * The registration arguments are as follows:
45 45 *
46 46 * const char *name
47 47 * The name of the ioctl. This is used for history logging. If the
48 48 * ioctl returns successfully (the callback returns 0), and allow_log
49 49 * is true, then a history log entry will be recorded with the input &
50 50 * output nvlists. The log entry can be printed with "zpool history -i".
51 51 *
52 52 * zfs_ioc_t ioc
53 53 * The ioctl request number, which userland will pass to ioctl(2).
54 54 * The ioctl numbers can change from release to release, because
55 55 * the caller (libzfs) must be matched to the kernel.
56 56 *
57 57 * zfs_secpolicy_func_t *secpolicy
58 58 * This function will be called before the zfs_ioc_func_t, to
59 59 * determine if this operation is permitted. It should return EPERM
60 60 * on failure, and 0 on success. Checks include determining if the
61 61 * dataset is visible in this zone, and if the user has either all
62 62 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
63 63 * to do this operation on this dataset with "zfs allow".
64 64 *
65 65 * zfs_ioc_namecheck_t namecheck
66 66 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
67 67 * name, a dataset name, or nothing. If the name is not well-formed,
68 68 * the ioctl will fail and the callback will not be called.
69 69 * Therefore, the callback can assume that the name is well-formed
70 70 * (e.g. is null-terminated, doesn't have more than one '@' character,
71 71 * doesn't have invalid characters).
72 72 *
73 73 * zfs_ioc_poolcheck_t pool_check
74 74 * This specifies requirements on the pool state. If the pool does
75 75 * not meet them (is suspended or is readonly), the ioctl will fail
76 76 * and the callback will not be called. If any checks are specified
77 77 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
78 78 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
79 79 * POOL_CHECK_READONLY).
80 80 *
81 81 * boolean_t smush_outnvlist
82 82 * If smush_outnvlist is true, then the output is presumed to be a
83 83 * list of errors, and it will be "smushed" down to fit into the
84 84 * caller's buffer, by removing some entries and replacing them with a
85 85 * single "N_MORE_ERRORS" entry indicating how many were removed. See
86 86 * nvlist_smush() for details. If smush_outnvlist is false, and the
87 87 * outnvlist does not fit into the userland-provided buffer, then the
88 88 * ioctl will fail with ENOMEM.
89 89 *
90 90 * zfs_ioc_func_t *func
91 91 * The callback function that will perform the operation.
92 92 *
93 93 * The callback should return 0 on success, or an error number on
94 94 * failure. If the function fails, the userland ioctl will return -1,
95 95 * and errno will be set to the callback's return value. The callback
96 96 * will be called with the following arguments:
97 97 *
98 98 * const char *name
99 99 * The name of the pool or dataset to operate on, from
100 100 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
101 101 * expected type (pool, dataset, or none).
102 102 *
103 103 * nvlist_t *innvl
104 104 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
105 105 * NULL if no input nvlist was provided. Changes to this nvlist are
106 106 * ignored. If the input nvlist could not be deserialized, the
107 107 * ioctl will fail and the callback will not be called.
108 108 *
109 109 * nvlist_t *outnvl
110 110 * The output nvlist, initially empty. The callback can fill it in,
111 111 * and it will be returned to userland by serializing it into
112 112 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
113 113 * fails (e.g. because the caller didn't supply a large enough
114 114 * buffer), then the overall ioctl will fail. See the
115 115 * 'smush_nvlist' argument above for additional behaviors.
116 116 *
117 117 * There are two typical uses of the output nvlist:
118 118 * - To return state, e.g. property values. In this case,
119 119 * smush_outnvlist should be false. If the buffer was not large
120 120 * enough, the caller will reallocate a larger buffer and try
121 121 * the ioctl again.
122 122 *
123 123 * - To return multiple errors from an ioctl which makes on-disk
124 124 * changes. In this case, smush_outnvlist should be true.
125 125 * Ioctls which make on-disk modifications should generally not
126 126 * use the outnvl if they succeed, because the caller can not
127 127 * distinguish between the operation failing, and
128 128 * deserialization failing.
129 129 */
130 130
131 131 #include <sys/types.h>
132 132 #include <sys/param.h>
133 133 #include <sys/errno.h>
134 134 #include <sys/uio.h>
135 135 #include <sys/buf.h>
136 136 #include <sys/modctl.h>
137 137 #include <sys/open.h>
138 138 #include <sys/file.h>
139 139 #include <sys/kmem.h>
140 140 #include <sys/conf.h>
141 141 #include <sys/cmn_err.h>
142 142 #include <sys/stat.h>
143 143 #include <sys/zfs_ioctl.h>
144 144 #include <sys/zfs_vfsops.h>
145 145 #include <sys/zfs_znode.h>
146 146 #include <sys/zap.h>
147 147 #include <sys/spa.h>
148 148 #include <sys/spa_impl.h>
149 149 #include <sys/vdev.h>
150 150 #include <sys/priv_impl.h>
151 151 #include <sys/dmu.h>
152 152 #include <sys/dsl_dir.h>
153 153 #include <sys/dsl_dataset.h>
154 154 #include <sys/dsl_prop.h>
155 155 #include <sys/dsl_deleg.h>
156 156 #include <sys/dmu_objset.h>
157 157 #include <sys/dmu_impl.h>
158 158 #include <sys/ddi.h>
159 159 #include <sys/sunddi.h>
160 160 #include <sys/sunldi.h>
161 161 #include <sys/policy.h>
162 162 #include <sys/zone.h>
163 163 #include <sys/nvpair.h>
164 164 #include <sys/pathname.h>
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165 165 #include <sys/mount.h>
166 166 #include <sys/sdt.h>
167 167 #include <sys/fs/zfs.h>
168 168 #include <sys/zfs_ctldir.h>
169 169 #include <sys/zfs_dir.h>
170 170 #include <sys/zfs_onexit.h>
171 171 #include <sys/zvol.h>
172 172 #include <sys/dsl_scan.h>
173 173 #include <sharefs/share.h>
174 174 #include <sys/dmu_objset.h>
175 +#include <sys/fits.h>
175 176
176 177 #include "zfs_namecheck.h"
177 178 #include "zfs_prop.h"
178 179 #include "zfs_deleg.h"
179 180 #include "zfs_comutil.h"
180 181
181 182 extern struct modlfs zfs_modlfs;
182 183
183 184 extern void zfs_init(void);
184 185 extern void zfs_fini(void);
185 186
186 187 ldi_ident_t zfs_li = NULL;
187 188 dev_info_t *zfs_dip;
188 189
189 190 uint_t zfs_fsyncer_key;
190 191 extern uint_t rrw_tsd_key;
191 192 static uint_t zfs_allow_log_key;
192 193
193 194 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
194 195 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
195 196 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
196 197
197 198 typedef enum {
198 199 NO_NAME,
199 200 POOL_NAME,
200 201 DATASET_NAME
201 202 } zfs_ioc_namecheck_t;
202 203
203 204 typedef enum {
204 205 POOL_CHECK_NONE = 1 << 0,
205 206 POOL_CHECK_SUSPENDED = 1 << 1,
206 207 POOL_CHECK_READONLY = 1 << 2,
207 208 } zfs_ioc_poolcheck_t;
208 209
209 210 typedef struct zfs_ioc_vec {
210 211 zfs_ioc_legacy_func_t *zvec_legacy_func;
211 212 zfs_ioc_func_t *zvec_func;
212 213 zfs_secpolicy_func_t *zvec_secpolicy;
213 214 zfs_ioc_namecheck_t zvec_namecheck;
214 215 boolean_t zvec_allow_log;
215 216 zfs_ioc_poolcheck_t zvec_pool_check;
216 217 boolean_t zvec_smush_outnvlist;
217 218 const char *zvec_name;
218 219 } zfs_ioc_vec_t;
219 220
220 221 /* This array is indexed by zfs_userquota_prop_t */
221 222 static const char *userquota_perms[] = {
222 223 ZFS_DELEG_PERM_USERUSED,
223 224 ZFS_DELEG_PERM_USERQUOTA,
224 225 ZFS_DELEG_PERM_GROUPUSED,
225 226 ZFS_DELEG_PERM_GROUPQUOTA,
226 227 };
227 228
228 229 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
229 230 static int zfs_check_settable(const char *name, nvpair_t *property,
230 231 cred_t *cr);
231 232 static int zfs_check_clearable(char *dataset, nvlist_t *props,
232 233 nvlist_t **errors);
233 234 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
234 235 boolean_t *);
235 236 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
236 237 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
237 238
238 239 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
239 240 void
240 241 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
241 242 {
242 243 const char *newfile;
243 244 char buf[512];
244 245 va_list adx;
245 246
246 247 /*
247 248 * Get rid of annoying "../common/" prefix to filename.
248 249 */
249 250 newfile = strrchr(file, '/');
250 251 if (newfile != NULL) {
251 252 newfile = newfile + 1; /* Get rid of leading / */
252 253 } else {
253 254 newfile = file;
254 255 }
255 256
256 257 va_start(adx, fmt);
257 258 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
258 259 va_end(adx);
259 260
260 261 /*
261 262 * To get this data, use the zfs-dprintf probe as so:
262 263 * dtrace -q -n 'zfs-dprintf \
263 264 * /stringof(arg0) == "dbuf.c"/ \
264 265 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
265 266 * arg0 = file name
266 267 * arg1 = function name
267 268 * arg2 = line number
268 269 * arg3 = message
269 270 */
270 271 DTRACE_PROBE4(zfs__dprintf,
271 272 char *, newfile, char *, func, int, line, char *, buf);
272 273 }
273 274
274 275 static void
275 276 history_str_free(char *buf)
276 277 {
277 278 kmem_free(buf, HIS_MAX_RECORD_LEN);
278 279 }
279 280
280 281 static char *
281 282 history_str_get(zfs_cmd_t *zc)
282 283 {
283 284 char *buf;
284 285
285 286 if (zc->zc_history == NULL)
286 287 return (NULL);
287 288
288 289 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
289 290 if (copyinstr((void *)(uintptr_t)zc->zc_history,
290 291 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
291 292 history_str_free(buf);
292 293 return (NULL);
293 294 }
294 295
295 296 buf[HIS_MAX_RECORD_LEN -1] = '\0';
296 297
297 298 return (buf);
298 299 }
299 300
300 301 /*
301 302 * Check to see if the named dataset is currently defined as bootable
302 303 */
303 304 static boolean_t
304 305 zfs_is_bootfs(const char *name)
305 306 {
306 307 objset_t *os;
307 308
308 309 if (dmu_objset_hold(name, FTAG, &os) == 0) {
309 310 boolean_t ret;
310 311 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
311 312 dmu_objset_rele(os, FTAG);
312 313 return (ret);
313 314 }
314 315 return (B_FALSE);
315 316 }
316 317
317 318 /*
318 319 * zfs_earlier_version
319 320 *
320 321 * Return non-zero if the spa version is less than requested version.
321 322 */
322 323 static int
323 324 zfs_earlier_version(const char *name, int version)
324 325 {
325 326 spa_t *spa;
326 327
327 328 if (spa_open(name, &spa, FTAG) == 0) {
328 329 if (spa_version(spa) < version) {
329 330 spa_close(spa, FTAG);
330 331 return (1);
331 332 }
332 333 spa_close(spa, FTAG);
333 334 }
334 335 return (0);
335 336 }
336 337
337 338 /*
338 339 * zpl_earlier_version
339 340 *
340 341 * Return TRUE if the ZPL version is less than requested version.
341 342 */
342 343 static boolean_t
343 344 zpl_earlier_version(const char *name, int version)
344 345 {
345 346 objset_t *os;
346 347 boolean_t rc = B_TRUE;
347 348
348 349 if (dmu_objset_hold(name, FTAG, &os) == 0) {
349 350 uint64_t zplversion;
350 351
351 352 if (dmu_objset_type(os) != DMU_OST_ZFS) {
352 353 dmu_objset_rele(os, FTAG);
353 354 return (B_TRUE);
354 355 }
355 356 /* XXX reading from non-owned objset */
356 357 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
357 358 rc = zplversion < version;
358 359 dmu_objset_rele(os, FTAG);
359 360 }
360 361 return (rc);
361 362 }
362 363
363 364 static void
364 365 zfs_log_history(zfs_cmd_t *zc)
365 366 {
366 367 spa_t *spa;
367 368 char *buf;
368 369
369 370 if ((buf = history_str_get(zc)) == NULL)
370 371 return;
371 372
372 373 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
373 374 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
374 375 (void) spa_history_log(spa, buf);
375 376 spa_close(spa, FTAG);
376 377 }
377 378 history_str_free(buf);
378 379 }
379 380
380 381 /*
381 382 * Policy for top-level read operations (list pools). Requires no privileges,
382 383 * and can be used in the local zone, as there is no associated dataset.
383 384 */
384 385 /* ARGSUSED */
385 386 static int
386 387 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
387 388 {
388 389 return (0);
389 390 }
390 391
391 392 /*
392 393 * Policy for dataset read operations (list children, get statistics). Requires
393 394 * no privileges, but must be visible in the local zone.
394 395 */
395 396 /* ARGSUSED */
396 397 static int
397 398 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
398 399 {
399 400 if (INGLOBALZONE(curproc) ||
400 401 zone_dataset_visible(zc->zc_name, NULL))
401 402 return (0);
402 403
403 404 return (ENOENT);
404 405 }
405 406
406 407 static int
407 408 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
408 409 {
409 410 int writable = 1;
410 411
411 412 /*
412 413 * The dataset must be visible by this zone -- check this first
413 414 * so they don't see EPERM on something they shouldn't know about.
414 415 */
415 416 if (!INGLOBALZONE(curproc) &&
416 417 !zone_dataset_visible(dataset, &writable))
417 418 return (ENOENT);
418 419
419 420 if (INGLOBALZONE(curproc)) {
420 421 /*
421 422 * If the fs is zoned, only root can access it from the
422 423 * global zone.
423 424 */
424 425 if (secpolicy_zfs(cr) && zoned)
425 426 return (EPERM);
426 427 } else {
427 428 /*
428 429 * If we are in a local zone, the 'zoned' property must be set.
429 430 */
430 431 if (!zoned)
431 432 return (EPERM);
432 433
433 434 /* must be writable by this zone */
434 435 if (!writable)
435 436 return (EPERM);
436 437 }
437 438 return (0);
438 439 }
439 440
440 441 static int
441 442 zfs_dozonecheck(const char *dataset, cred_t *cr)
442 443 {
443 444 uint64_t zoned;
444 445
445 446 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
446 447 return (ENOENT);
447 448
448 449 return (zfs_dozonecheck_impl(dataset, zoned, cr));
449 450 }
450 451
451 452 static int
452 453 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
453 454 {
454 455 uint64_t zoned;
455 456
456 457 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
457 458 if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
458 459 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
459 460 return (ENOENT);
460 461 }
461 462 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
462 463
463 464 return (zfs_dozonecheck_impl(dataset, zoned, cr));
464 465 }
465 466
466 467 static int
467 468 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
468 469 {
469 470 int error;
470 471 dsl_dataset_t *ds;
471 472
472 473 error = dsl_dataset_hold(name, FTAG, &ds);
473 474 if (error != 0)
474 475 return (error);
475 476
476 477 error = zfs_dozonecheck_ds(name, ds, cr);
477 478 if (error == 0) {
478 479 error = secpolicy_zfs(cr);
479 480 if (error)
480 481 error = dsl_deleg_access_impl(ds, perm, cr);
481 482 }
482 483
483 484 dsl_dataset_rele(ds, FTAG);
484 485 return (error);
485 486 }
486 487
487 488 static int
488 489 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
489 490 const char *perm, cred_t *cr)
490 491 {
491 492 int error;
492 493
493 494 error = zfs_dozonecheck_ds(name, ds, cr);
494 495 if (error == 0) {
495 496 error = secpolicy_zfs(cr);
496 497 if (error)
497 498 error = dsl_deleg_access_impl(ds, perm, cr);
498 499 }
499 500 return (error);
500 501 }
501 502
502 503 /*
503 504 * Policy for setting the security label property.
504 505 *
505 506 * Returns 0 for success, non-zero for access and other errors.
506 507 */
507 508 static int
508 509 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
509 510 {
510 511 char ds_hexsl[MAXNAMELEN];
511 512 bslabel_t ds_sl, new_sl;
512 513 boolean_t new_default = FALSE;
513 514 uint64_t zoned;
514 515 int needed_priv = -1;
515 516 int error;
516 517
517 518 /* First get the existing dataset label. */
518 519 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
519 520 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
520 521 if (error)
521 522 return (EPERM);
522 523
523 524 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
524 525 new_default = TRUE;
525 526
526 527 /* The label must be translatable */
527 528 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
528 529 return (EINVAL);
529 530
530 531 /*
531 532 * In a non-global zone, disallow attempts to set a label that
532 533 * doesn't match that of the zone; otherwise no other checks
533 534 * are needed.
534 535 */
535 536 if (!INGLOBALZONE(curproc)) {
536 537 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
537 538 return (EPERM);
538 539 return (0);
539 540 }
540 541
541 542 /*
542 543 * For global-zone datasets (i.e., those whose zoned property is
543 544 * "off", verify that the specified new label is valid for the
544 545 * global zone.
545 546 */
546 547 if (dsl_prop_get_integer(name,
547 548 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
548 549 return (EPERM);
549 550 if (!zoned) {
550 551 if (zfs_check_global_label(name, strval) != 0)
551 552 return (EPERM);
552 553 }
553 554
554 555 /*
555 556 * If the existing dataset label is nondefault, check if the
556 557 * dataset is mounted (label cannot be changed while mounted).
557 558 * Get the zfsvfs; if there isn't one, then the dataset isn't
558 559 * mounted (or isn't a dataset, doesn't exist, ...).
559 560 */
560 561 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
561 562 objset_t *os;
562 563 static char *setsl_tag = "setsl_tag";
563 564
564 565 /*
565 566 * Try to own the dataset; abort if there is any error,
566 567 * (e.g., already mounted, in use, or other error).
567 568 */
568 569 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
569 570 setsl_tag, &os);
570 571 if (error)
571 572 return (EPERM);
572 573
573 574 dmu_objset_disown(os, setsl_tag);
574 575
575 576 if (new_default) {
576 577 needed_priv = PRIV_FILE_DOWNGRADE_SL;
577 578 goto out_check;
578 579 }
579 580
580 581 if (hexstr_to_label(strval, &new_sl) != 0)
581 582 return (EPERM);
582 583
583 584 if (blstrictdom(&ds_sl, &new_sl))
584 585 needed_priv = PRIV_FILE_DOWNGRADE_SL;
585 586 else if (blstrictdom(&new_sl, &ds_sl))
586 587 needed_priv = PRIV_FILE_UPGRADE_SL;
587 588 } else {
588 589 /* dataset currently has a default label */
589 590 if (!new_default)
590 591 needed_priv = PRIV_FILE_UPGRADE_SL;
591 592 }
592 593
593 594 out_check:
594 595 if (needed_priv != -1)
595 596 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
596 597 return (0);
597 598 }
598 599
599 600 static int
600 601 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
601 602 cred_t *cr)
602 603 {
603 604 char *strval;
604 605
605 606 /*
606 607 * Check permissions for special properties.
607 608 */
608 609 switch (prop) {
609 610 case ZFS_PROP_ZONED:
610 611 /*
611 612 * Disallow setting of 'zoned' from within a local zone.
612 613 */
613 614 if (!INGLOBALZONE(curproc))
614 615 return (EPERM);
615 616 break;
616 617
617 618 case ZFS_PROP_QUOTA:
618 619 if (!INGLOBALZONE(curproc)) {
619 620 uint64_t zoned;
620 621 char setpoint[MAXNAMELEN];
621 622 /*
622 623 * Unprivileged users are allowed to modify the
623 624 * quota on things *under* (ie. contained by)
624 625 * the thing they own.
625 626 */
626 627 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
627 628 setpoint))
628 629 return (EPERM);
629 630 if (!zoned || strlen(dsname) <= strlen(setpoint))
630 631 return (EPERM);
631 632 }
632 633 break;
633 634
634 635 case ZFS_PROP_MLSLABEL:
635 636 if (!is_system_labeled())
636 637 return (EPERM);
637 638
638 639 if (nvpair_value_string(propval, &strval) == 0) {
639 640 int err;
640 641
641 642 err = zfs_set_slabel_policy(dsname, strval, CRED());
642 643 if (err != 0)
643 644 return (err);
644 645 }
645 646 break;
646 647 }
647 648
648 649 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
649 650 }
650 651
651 652 /* ARGSUSED */
652 653 static int
653 654 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
654 655 {
655 656 int error;
656 657
657 658 error = zfs_dozonecheck(zc->zc_name, cr);
658 659 if (error)
659 660 return (error);
660 661
661 662 /*
662 663 * permission to set permissions will be evaluated later in
663 664 * dsl_deleg_can_allow()
664 665 */
665 666 return (0);
666 667 }
667 668
668 669 /* ARGSUSED */
669 670 static int
670 671 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
671 672 {
672 673 return (zfs_secpolicy_write_perms(zc->zc_name,
673 674 ZFS_DELEG_PERM_ROLLBACK, cr));
674 675 }
675 676
676 677 /* ARGSUSED */
677 678 static int
678 679 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
679 680 {
680 681 spa_t *spa;
681 682 dsl_pool_t *dp;
682 683 dsl_dataset_t *ds;
683 684 char *cp;
684 685 int error;
685 686
686 687 /*
687 688 * Generate the current snapshot name from the given objsetid, then
688 689 * use that name for the secpolicy/zone checks.
689 690 */
690 691 cp = strchr(zc->zc_name, '@');
691 692 if (cp == NULL)
692 693 return (EINVAL);
693 694 error = spa_open(zc->zc_name, &spa, FTAG);
694 695 if (error)
695 696 return (error);
696 697
697 698 dp = spa_get_dsl(spa);
698 699 rw_enter(&dp->dp_config_rwlock, RW_READER);
699 700 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
700 701 rw_exit(&dp->dp_config_rwlock);
701 702 spa_close(spa, FTAG);
702 703 if (error)
703 704 return (error);
704 705
705 706 dsl_dataset_name(ds, zc->zc_name);
706 707
707 708 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
708 709 ZFS_DELEG_PERM_SEND, cr);
709 710 dsl_dataset_rele(ds, FTAG);
710 711
711 712 return (error);
712 713 }
713 714
714 715 /* ARGSUSED */
715 716 static int
716 717 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
717 718 {
718 719 return (zfs_secpolicy_write_perms(zc->zc_name,
719 720 ZFS_DELEG_PERM_SEND, cr));
720 721 }
721 722
722 723 /* ARGSUSED */
723 724 static int
724 725 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
725 726 {
726 727 vnode_t *vp;
727 728 int error;
728 729
729 730 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
730 731 NO_FOLLOW, NULL, &vp)) != 0)
731 732 return (error);
732 733
733 734 /* Now make sure mntpnt and dataset are ZFS */
734 735
735 736 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
736 737 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
737 738 zc->zc_name) != 0)) {
738 739 VN_RELE(vp);
739 740 return (EPERM);
740 741 }
741 742
742 743 VN_RELE(vp);
743 744 return (dsl_deleg_access(zc->zc_name,
744 745 ZFS_DELEG_PERM_SHARE, cr));
745 746 }
746 747
747 748 int
748 749 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
749 750 {
750 751 if (!INGLOBALZONE(curproc))
751 752 return (EPERM);
752 753
753 754 if (secpolicy_nfs(cr) == 0) {
754 755 return (0);
755 756 } else {
756 757 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
757 758 }
758 759 }
759 760
760 761 int
761 762 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
762 763 {
763 764 if (!INGLOBALZONE(curproc))
764 765 return (EPERM);
765 766
766 767 if (secpolicy_smb(cr) == 0) {
767 768 return (0);
768 769 } else {
769 770 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
770 771 }
771 772 }
772 773
773 774 static int
774 775 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
775 776 {
776 777 char *cp;
777 778
778 779 /*
779 780 * Remove the @bla or /bla from the end of the name to get the parent.
780 781 */
781 782 (void) strncpy(parent, datasetname, parentsize);
782 783 cp = strrchr(parent, '@');
783 784 if (cp != NULL) {
784 785 cp[0] = '\0';
785 786 } else {
786 787 cp = strrchr(parent, '/');
787 788 if (cp == NULL)
788 789 return (ENOENT);
789 790 cp[0] = '\0';
790 791 }
791 792
792 793 return (0);
793 794 }
794 795
795 796 int
796 797 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
797 798 {
798 799 int error;
799 800
800 801 if ((error = zfs_secpolicy_write_perms(name,
801 802 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
802 803 return (error);
803 804
804 805 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
805 806 }
806 807
807 808 /* ARGSUSED */
808 809 static int
809 810 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
810 811 {
811 812 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
812 813 }
813 814
814 815 /*
815 816 * Destroying snapshots with delegated permissions requires
816 817 * descendant mount and destroy permissions.
817 818 */
818 819 /* ARGSUSED */
819 820 static int
820 821 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
821 822 {
822 823 nvlist_t *snaps;
823 824 nvpair_t *pair, *nextpair;
824 825 int error = 0;
825 826
826 827 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
827 828 return (EINVAL);
828 829 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
829 830 pair = nextpair) {
830 831 dsl_dataset_t *ds;
831 832
832 833 nextpair = nvlist_next_nvpair(snaps, pair);
833 834 error = dsl_dataset_hold(nvpair_name(pair), FTAG, &ds);
834 835 if (error == 0) {
835 836 dsl_dataset_rele(ds, FTAG);
836 837 } else if (error == ENOENT) {
837 838 /*
838 839 * Ignore any snapshots that don't exist (we consider
839 840 * them "already destroyed"). Remove the name from the
840 841 * nvl here in case the snapshot is created between
841 842 * now and when we try to destroy it (in which case
842 843 * we don't want to destroy it since we haven't
843 844 * checked for permission).
844 845 */
845 846 fnvlist_remove_nvpair(snaps, pair);
846 847 error = 0;
847 848 continue;
848 849 } else {
849 850 break;
850 851 }
851 852 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
852 853 if (error != 0)
853 854 break;
854 855 }
855 856
856 857 return (error);
857 858 }
858 859
859 860 int
860 861 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
861 862 {
862 863 char parentname[MAXNAMELEN];
863 864 int error;
864 865
865 866 if ((error = zfs_secpolicy_write_perms(from,
866 867 ZFS_DELEG_PERM_RENAME, cr)) != 0)
867 868 return (error);
868 869
869 870 if ((error = zfs_secpolicy_write_perms(from,
870 871 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
871 872 return (error);
872 873
873 874 if ((error = zfs_get_parent(to, parentname,
874 875 sizeof (parentname))) != 0)
875 876 return (error);
876 877
877 878 if ((error = zfs_secpolicy_write_perms(parentname,
878 879 ZFS_DELEG_PERM_CREATE, cr)) != 0)
879 880 return (error);
880 881
881 882 if ((error = zfs_secpolicy_write_perms(parentname,
882 883 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
883 884 return (error);
884 885
885 886 return (error);
886 887 }
887 888
888 889 /* ARGSUSED */
889 890 static int
890 891 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
891 892 {
892 893 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
893 894 }
894 895
895 896 /* ARGSUSED */
896 897 static int
897 898 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
898 899 {
899 900 char parentname[MAXNAMELEN];
900 901 objset_t *clone;
901 902 int error;
902 903
903 904 error = zfs_secpolicy_write_perms(zc->zc_name,
904 905 ZFS_DELEG_PERM_PROMOTE, cr);
905 906 if (error)
906 907 return (error);
907 908
908 909 error = dmu_objset_hold(zc->zc_name, FTAG, &clone);
909 910
910 911 if (error == 0) {
911 912 dsl_dataset_t *pclone = NULL;
912 913 dsl_dir_t *dd;
913 914 dd = clone->os_dsl_dataset->ds_dir;
914 915
915 916 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
916 917 error = dsl_dataset_hold_obj(dd->dd_pool,
917 918 dd->dd_phys->dd_origin_obj, FTAG, &pclone);
918 919 rw_exit(&dd->dd_pool->dp_config_rwlock);
919 920 if (error) {
920 921 dmu_objset_rele(clone, FTAG);
921 922 return (error);
922 923 }
923 924
924 925 error = zfs_secpolicy_write_perms(zc->zc_name,
925 926 ZFS_DELEG_PERM_MOUNT, cr);
926 927
927 928 dsl_dataset_name(pclone, parentname);
928 929 dmu_objset_rele(clone, FTAG);
929 930 dsl_dataset_rele(pclone, FTAG);
930 931 if (error == 0)
931 932 error = zfs_secpolicy_write_perms(parentname,
932 933 ZFS_DELEG_PERM_PROMOTE, cr);
933 934 }
934 935 return (error);
935 936 }
936 937
937 938 /* ARGSUSED */
938 939 static int
939 940 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
940 941 {
941 942 int error;
942 943
943 944 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
944 945 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
945 946 return (error);
946 947
947 948 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
948 949 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
949 950 return (error);
950 951
951 952 return (zfs_secpolicy_write_perms(zc->zc_name,
952 953 ZFS_DELEG_PERM_CREATE, cr));
953 954 }
954 955
955 956 int
956 957 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
957 958 {
958 959 return (zfs_secpolicy_write_perms(name,
959 960 ZFS_DELEG_PERM_SNAPSHOT, cr));
960 961 }
961 962
962 963 /*
963 964 * Check for permission to create each snapshot in the nvlist.
964 965 */
965 966 /* ARGSUSED */
966 967 static int
967 968 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
968 969 {
969 970 nvlist_t *snaps;
970 971 int error;
971 972 nvpair_t *pair;
972 973
973 974 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
974 975 return (EINVAL);
975 976 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
976 977 pair = nvlist_next_nvpair(snaps, pair)) {
977 978 char *name = nvpair_name(pair);
978 979 char *atp = strchr(name, '@');
979 980
980 981 if (atp == NULL) {
981 982 error = EINVAL;
982 983 break;
983 984 }
984 985 *atp = '\0';
985 986 error = zfs_secpolicy_snapshot_perms(name, cr);
986 987 *atp = '@';
987 988 if (error != 0)
988 989 break;
989 990 }
990 991 return (error);
991 992 }
992 993
993 994 /* ARGSUSED */
994 995 static int
995 996 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
996 997 {
997 998 /*
998 999 * Even root must have a proper TSD so that we know what pool
999 1000 * to log to.
1000 1001 */
1001 1002 if (tsd_get(zfs_allow_log_key) == NULL)
1002 1003 return (EPERM);
1003 1004 return (0);
1004 1005 }
1005 1006
1006 1007 static int
1007 1008 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1008 1009 {
1009 1010 char parentname[MAXNAMELEN];
1010 1011 int error;
1011 1012 char *origin;
1012 1013
1013 1014 if ((error = zfs_get_parent(zc->zc_name, parentname,
1014 1015 sizeof (parentname))) != 0)
1015 1016 return (error);
1016 1017
1017 1018 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1018 1019 (error = zfs_secpolicy_write_perms(origin,
1019 1020 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1020 1021 return (error);
1021 1022
1022 1023 if ((error = zfs_secpolicy_write_perms(parentname,
1023 1024 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1024 1025 return (error);
1025 1026
1026 1027 return (zfs_secpolicy_write_perms(parentname,
1027 1028 ZFS_DELEG_PERM_MOUNT, cr));
1028 1029 }
1029 1030
1030 1031 /*
1031 1032 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1032 1033 * SYS_CONFIG privilege, which is not available in a local zone.
1033 1034 */
1034 1035 /* ARGSUSED */
1035 1036 static int
1036 1037 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1037 1038 {
1038 1039 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1039 1040 return (EPERM);
1040 1041
1041 1042 return (0);
1042 1043 }
1043 1044
1044 1045 /*
1045 1046 * Policy for object to name lookups.
1046 1047 */
1047 1048 /* ARGSUSED */
1048 1049 static int
1049 1050 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1050 1051 {
1051 1052 int error;
1052 1053
1053 1054 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1054 1055 return (0);
1055 1056
1056 1057 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1057 1058 return (error);
1058 1059 }
1059 1060
1060 1061 /*
1061 1062 * Policy for fault injection. Requires all privileges.
1062 1063 */
1063 1064 /* ARGSUSED */
1064 1065 static int
1065 1066 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1066 1067 {
1067 1068 return (secpolicy_zinject(cr));
1068 1069 }
1069 1070
1070 1071 /* ARGSUSED */
1071 1072 static int
1072 1073 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1073 1074 {
1074 1075 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1075 1076
1076 1077 if (prop == ZPROP_INVAL) {
1077 1078 if (!zfs_prop_user(zc->zc_value))
1078 1079 return (EINVAL);
1079 1080 return (zfs_secpolicy_write_perms(zc->zc_name,
1080 1081 ZFS_DELEG_PERM_USERPROP, cr));
1081 1082 } else {
1082 1083 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1083 1084 NULL, cr));
1084 1085 }
1085 1086 }
1086 1087
1087 1088 static int
1088 1089 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1089 1090 {
1090 1091 int err = zfs_secpolicy_read(zc, innvl, cr);
1091 1092 if (err)
1092 1093 return (err);
1093 1094
1094 1095 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1095 1096 return (EINVAL);
1096 1097
1097 1098 if (zc->zc_value[0] == 0) {
1098 1099 /*
1099 1100 * They are asking about a posix uid/gid. If it's
1100 1101 * themself, allow it.
1101 1102 */
1102 1103 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1103 1104 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1104 1105 if (zc->zc_guid == crgetuid(cr))
1105 1106 return (0);
1106 1107 } else {
1107 1108 if (groupmember(zc->zc_guid, cr))
1108 1109 return (0);
1109 1110 }
1110 1111 }
1111 1112
1112 1113 return (zfs_secpolicy_write_perms(zc->zc_name,
1113 1114 userquota_perms[zc->zc_objset_type], cr));
1114 1115 }
1115 1116
1116 1117 static int
1117 1118 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1118 1119 {
1119 1120 int err = zfs_secpolicy_read(zc, innvl, cr);
1120 1121 if (err)
1121 1122 return (err);
1122 1123
1123 1124 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1124 1125 return (EINVAL);
1125 1126
1126 1127 return (zfs_secpolicy_write_perms(zc->zc_name,
1127 1128 userquota_perms[zc->zc_objset_type], cr));
1128 1129 }
1129 1130
1130 1131 /* ARGSUSED */
1131 1132 static int
1132 1133 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1133 1134 {
1134 1135 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1135 1136 NULL, cr));
1136 1137 }
1137 1138
1138 1139 /* ARGSUSED */
1139 1140 static int
1140 1141 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1141 1142 {
1142 1143 return (zfs_secpolicy_write_perms(zc->zc_name,
1143 1144 ZFS_DELEG_PERM_HOLD, cr));
1144 1145 }
1145 1146
1146 1147 /* ARGSUSED */
1147 1148 static int
1148 1149 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1149 1150 {
1150 1151 return (zfs_secpolicy_write_perms(zc->zc_name,
1151 1152 ZFS_DELEG_PERM_RELEASE, cr));
1152 1153 }
1153 1154
1154 1155 /*
1155 1156 * Policy for allowing temporary snapshots to be taken or released
1156 1157 */
1157 1158 static int
1158 1159 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1159 1160 {
1160 1161 /*
1161 1162 * A temporary snapshot is the same as a snapshot,
1162 1163 * hold, destroy and release all rolled into one.
1163 1164 * Delegated diff alone is sufficient that we allow this.
1164 1165 */
1165 1166 int error;
1166 1167
1167 1168 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1168 1169 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1169 1170 return (0);
1170 1171
1171 1172 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1172 1173 if (!error)
1173 1174 error = zfs_secpolicy_hold(zc, innvl, cr);
1174 1175 if (!error)
1175 1176 error = zfs_secpolicy_release(zc, innvl, cr);
1176 1177 if (!error)
1177 1178 error = zfs_secpolicy_destroy(zc, innvl, cr);
1178 1179 return (error);
1179 1180 }
1180 1181
1181 1182 /*
1182 1183 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1183 1184 */
1184 1185 static int
1185 1186 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1186 1187 {
1187 1188 char *packed;
1188 1189 int error;
1189 1190 nvlist_t *list = NULL;
1190 1191
1191 1192 /*
1192 1193 * Read in and unpack the user-supplied nvlist.
1193 1194 */
1194 1195 if (size == 0)
1195 1196 return (EINVAL);
1196 1197
1197 1198 packed = kmem_alloc(size, KM_SLEEP);
1198 1199
1199 1200 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1200 1201 iflag)) != 0) {
1201 1202 kmem_free(packed, size);
1202 1203 return (error);
1203 1204 }
1204 1205
1205 1206 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1206 1207 kmem_free(packed, size);
1207 1208 return (error);
1208 1209 }
1209 1210
1210 1211 kmem_free(packed, size);
1211 1212
1212 1213 *nvp = list;
1213 1214 return (0);
1214 1215 }
1215 1216
1216 1217 /*
1217 1218 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1218 1219 * Entries will be removed from the end of the nvlist, and one int32 entry
1219 1220 * named "N_MORE_ERRORS" will be added indicating how many entries were
1220 1221 * removed.
1221 1222 */
1222 1223 static int
1223 1224 nvlist_smush(nvlist_t *errors, size_t max)
1224 1225 {
1225 1226 size_t size;
1226 1227
1227 1228 size = fnvlist_size(errors);
1228 1229
1229 1230 if (size > max) {
1230 1231 nvpair_t *more_errors;
1231 1232 int n = 0;
1232 1233
1233 1234 if (max < 1024)
1234 1235 return (ENOMEM);
1235 1236
1236 1237 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1237 1238 more_errors = nvlist_prev_nvpair(errors, NULL);
1238 1239
1239 1240 do {
1240 1241 nvpair_t *pair = nvlist_prev_nvpair(errors,
1241 1242 more_errors);
1242 1243 fnvlist_remove_nvpair(errors, pair);
1243 1244 n++;
1244 1245 size = fnvlist_size(errors);
1245 1246 } while (size > max);
1246 1247
1247 1248 fnvlist_remove_nvpair(errors, more_errors);
1248 1249 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1249 1250 ASSERT3U(fnvlist_size(errors), <=, max);
1250 1251 }
1251 1252
1252 1253 return (0);
1253 1254 }
1254 1255
1255 1256 static int
1256 1257 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1257 1258 {
1258 1259 char *packed = NULL;
1259 1260 int error = 0;
1260 1261 size_t size;
1261 1262
1262 1263 size = fnvlist_size(nvl);
1263 1264
1264 1265 if (size > zc->zc_nvlist_dst_size) {
1265 1266 error = ENOMEM;
1266 1267 } else {
1267 1268 packed = fnvlist_pack(nvl, &size);
1268 1269 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1269 1270 size, zc->zc_iflags) != 0)
1270 1271 error = EFAULT;
1271 1272 fnvlist_pack_free(packed, size);
1272 1273 }
1273 1274
1274 1275 zc->zc_nvlist_dst_size = size;
1275 1276 zc->zc_nvlist_dst_filled = B_TRUE;
1276 1277 return (error);
1277 1278 }
1278 1279
1279 1280 static int
1280 1281 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1281 1282 {
1282 1283 objset_t *os;
1283 1284 int error;
1284 1285
1285 1286 error = dmu_objset_hold(dsname, FTAG, &os);
1286 1287 if (error)
1287 1288 return (error);
1288 1289 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1289 1290 dmu_objset_rele(os, FTAG);
1290 1291 return (EINVAL);
1291 1292 }
1292 1293
1293 1294 mutex_enter(&os->os_user_ptr_lock);
1294 1295 *zfvp = dmu_objset_get_user(os);
1295 1296 if (*zfvp) {
1296 1297 VFS_HOLD((*zfvp)->z_vfs);
1297 1298 } else {
1298 1299 error = ESRCH;
1299 1300 }
1300 1301 mutex_exit(&os->os_user_ptr_lock);
1301 1302 dmu_objset_rele(os, FTAG);
1302 1303 return (error);
1303 1304 }
1304 1305
1305 1306 /*
1306 1307 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1307 1308 * case its z_vfs will be NULL, and it will be opened as the owner.
1308 1309 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1309 1310 * which prevents all vnode ops from running.
1310 1311 */
1311 1312 static int
1312 1313 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1313 1314 {
1314 1315 int error = 0;
1315 1316
1316 1317 if (getzfsvfs(name, zfvp) != 0)
1317 1318 error = zfsvfs_create(name, zfvp);
1318 1319 if (error == 0) {
1319 1320 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1320 1321 RW_READER, tag);
1321 1322 if ((*zfvp)->z_unmounted) {
1322 1323 /*
1323 1324 * XXX we could probably try again, since the unmounting
1324 1325 * thread should be just about to disassociate the
1325 1326 * objset from the zfsvfs.
1326 1327 */
1327 1328 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1328 1329 return (EBUSY);
1329 1330 }
1330 1331 }
1331 1332 return (error);
1332 1333 }
1333 1334
1334 1335 static void
1335 1336 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1336 1337 {
1337 1338 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1338 1339
1339 1340 if (zfsvfs->z_vfs) {
1340 1341 VFS_RELE(zfsvfs->z_vfs);
1341 1342 } else {
1342 1343 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1343 1344 zfsvfs_free(zfsvfs);
1344 1345 }
1345 1346 }
1346 1347
1347 1348 static int
1348 1349 zfs_ioc_pool_create(zfs_cmd_t *zc)
1349 1350 {
1350 1351 int error;
1351 1352 nvlist_t *config, *props = NULL;
1352 1353 nvlist_t *rootprops = NULL;
1353 1354 nvlist_t *zplprops = NULL;
1354 1355
1355 1356 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1356 1357 zc->zc_iflags, &config))
1357 1358 return (error);
1358 1359
1359 1360 if (zc->zc_nvlist_src_size != 0 && (error =
1360 1361 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1361 1362 zc->zc_iflags, &props))) {
1362 1363 nvlist_free(config);
1363 1364 return (error);
1364 1365 }
1365 1366
1366 1367 if (props) {
1367 1368 nvlist_t *nvl = NULL;
1368 1369 uint64_t version = SPA_VERSION;
1369 1370
1370 1371 (void) nvlist_lookup_uint64(props,
1371 1372 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1372 1373 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1373 1374 error = EINVAL;
1374 1375 goto pool_props_bad;
1375 1376 }
1376 1377 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1377 1378 if (nvl) {
1378 1379 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1379 1380 if (error != 0) {
1380 1381 nvlist_free(config);
1381 1382 nvlist_free(props);
1382 1383 return (error);
1383 1384 }
1384 1385 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1385 1386 }
1386 1387 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1387 1388 error = zfs_fill_zplprops_root(version, rootprops,
1388 1389 zplprops, NULL);
1389 1390 if (error)
1390 1391 goto pool_props_bad;
1391 1392 }
1392 1393
1393 1394 error = spa_create(zc->zc_name, config, props, zplprops);
1394 1395
1395 1396 /*
1396 1397 * Set the remaining root properties
1397 1398 */
1398 1399 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1399 1400 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1400 1401 (void) spa_destroy(zc->zc_name);
1401 1402
1402 1403 pool_props_bad:
1403 1404 nvlist_free(rootprops);
1404 1405 nvlist_free(zplprops);
1405 1406 nvlist_free(config);
1406 1407 nvlist_free(props);
1407 1408
1408 1409 return (error);
1409 1410 }
1410 1411
1411 1412 static int
1412 1413 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1413 1414 {
1414 1415 int error;
1415 1416 zfs_log_history(zc);
1416 1417 error = spa_destroy(zc->zc_name);
1417 1418 if (error == 0)
1418 1419 zvol_remove_minors(zc->zc_name);
1419 1420 return (error);
1420 1421 }
1421 1422
1422 1423 static int
1423 1424 zfs_ioc_pool_import(zfs_cmd_t *zc)
1424 1425 {
1425 1426 nvlist_t *config, *props = NULL;
1426 1427 uint64_t guid;
1427 1428 int error;
1428 1429
1429 1430 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1430 1431 zc->zc_iflags, &config)) != 0)
1431 1432 return (error);
1432 1433
1433 1434 if (zc->zc_nvlist_src_size != 0 && (error =
1434 1435 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1435 1436 zc->zc_iflags, &props))) {
1436 1437 nvlist_free(config);
1437 1438 return (error);
1438 1439 }
1439 1440
1440 1441 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1441 1442 guid != zc->zc_guid)
1442 1443 error = EINVAL;
1443 1444 else
1444 1445 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1445 1446
1446 1447 if (zc->zc_nvlist_dst != 0) {
1447 1448 int err;
1448 1449
1449 1450 if ((err = put_nvlist(zc, config)) != 0)
1450 1451 error = err;
1451 1452 }
1452 1453
1453 1454 nvlist_free(config);
1454 1455
1455 1456 if (props)
1456 1457 nvlist_free(props);
1457 1458
1458 1459 return (error);
1459 1460 }
1460 1461
1461 1462 static int
1462 1463 zfs_ioc_pool_export(zfs_cmd_t *zc)
1463 1464 {
1464 1465 int error;
1465 1466 boolean_t force = (boolean_t)zc->zc_cookie;
1466 1467 boolean_t hardforce = (boolean_t)zc->zc_guid;
1467 1468
1468 1469 zfs_log_history(zc);
1469 1470 error = spa_export(zc->zc_name, NULL, force, hardforce);
1470 1471 if (error == 0)
1471 1472 zvol_remove_minors(zc->zc_name);
1472 1473 return (error);
1473 1474 }
1474 1475
1475 1476 static int
1476 1477 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1477 1478 {
1478 1479 nvlist_t *configs;
1479 1480 int error;
1480 1481
1481 1482 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1482 1483 return (EEXIST);
1483 1484
1484 1485 error = put_nvlist(zc, configs);
1485 1486
1486 1487 nvlist_free(configs);
1487 1488
1488 1489 return (error);
1489 1490 }
1490 1491
1491 1492 /*
1492 1493 * inputs:
1493 1494 * zc_name name of the pool
1494 1495 *
1495 1496 * outputs:
1496 1497 * zc_cookie real errno
1497 1498 * zc_nvlist_dst config nvlist
1498 1499 * zc_nvlist_dst_size size of config nvlist
1499 1500 */
1500 1501 static int
1501 1502 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1502 1503 {
1503 1504 nvlist_t *config;
1504 1505 int error;
1505 1506 int ret = 0;
1506 1507
1507 1508 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1508 1509 sizeof (zc->zc_value));
1509 1510
1510 1511 if (config != NULL) {
1511 1512 ret = put_nvlist(zc, config);
1512 1513 nvlist_free(config);
1513 1514
1514 1515 /*
1515 1516 * The config may be present even if 'error' is non-zero.
1516 1517 * In this case we return success, and preserve the real errno
1517 1518 * in 'zc_cookie'.
1518 1519 */
1519 1520 zc->zc_cookie = error;
1520 1521 } else {
1521 1522 ret = error;
1522 1523 }
1523 1524
1524 1525 return (ret);
1525 1526 }
1526 1527
1527 1528 /*
1528 1529 * Try to import the given pool, returning pool stats as appropriate so that
1529 1530 * user land knows which devices are available and overall pool health.
1530 1531 */
1531 1532 static int
1532 1533 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1533 1534 {
1534 1535 nvlist_t *tryconfig, *config;
1535 1536 int error;
1536 1537
1537 1538 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1538 1539 zc->zc_iflags, &tryconfig)) != 0)
1539 1540 return (error);
1540 1541
1541 1542 config = spa_tryimport(tryconfig);
1542 1543
1543 1544 nvlist_free(tryconfig);
1544 1545
1545 1546 if (config == NULL)
1546 1547 return (EINVAL);
1547 1548
1548 1549 error = put_nvlist(zc, config);
1549 1550 nvlist_free(config);
1550 1551
1551 1552 return (error);
1552 1553 }
1553 1554
1554 1555 /*
1555 1556 * inputs:
1556 1557 * zc_name name of the pool
1557 1558 * zc_cookie scan func (pool_scan_func_t)
1558 1559 */
1559 1560 static int
1560 1561 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1561 1562 {
1562 1563 spa_t *spa;
1563 1564 int error;
1564 1565
1565 1566 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1566 1567 return (error);
1567 1568
1568 1569 if (zc->zc_cookie == POOL_SCAN_NONE)
1569 1570 error = spa_scan_stop(spa);
1570 1571 else
1571 1572 error = spa_scan(spa, zc->zc_cookie);
1572 1573
1573 1574 spa_close(spa, FTAG);
1574 1575
1575 1576 return (error);
1576 1577 }
1577 1578
1578 1579 static int
1579 1580 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1580 1581 {
1581 1582 spa_t *spa;
1582 1583 int error;
1583 1584
1584 1585 error = spa_open(zc->zc_name, &spa, FTAG);
1585 1586 if (error == 0) {
1586 1587 spa_freeze(spa);
1587 1588 spa_close(spa, FTAG);
1588 1589 }
1589 1590 return (error);
1590 1591 }
1591 1592
1592 1593 static int
1593 1594 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1594 1595 {
1595 1596 spa_t *spa;
1596 1597 int error;
1597 1598
1598 1599 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1599 1600 return (error);
1600 1601
1601 1602 if (zc->zc_cookie < spa_version(spa) ||
1602 1603 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1603 1604 spa_close(spa, FTAG);
1604 1605 return (EINVAL);
1605 1606 }
1606 1607
1607 1608 spa_upgrade(spa, zc->zc_cookie);
1608 1609 spa_close(spa, FTAG);
1609 1610
1610 1611 return (error);
1611 1612 }
1612 1613
1613 1614 static int
1614 1615 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1615 1616 {
1616 1617 spa_t *spa;
1617 1618 char *hist_buf;
1618 1619 uint64_t size;
1619 1620 int error;
1620 1621
1621 1622 if ((size = zc->zc_history_len) == 0)
1622 1623 return (EINVAL);
1623 1624
1624 1625 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1625 1626 return (error);
1626 1627
1627 1628 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1628 1629 spa_close(spa, FTAG);
1629 1630 return (ENOTSUP);
1630 1631 }
1631 1632
1632 1633 hist_buf = kmem_alloc(size, KM_SLEEP);
1633 1634 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1634 1635 &zc->zc_history_len, hist_buf)) == 0) {
1635 1636 error = ddi_copyout(hist_buf,
1636 1637 (void *)(uintptr_t)zc->zc_history,
1637 1638 zc->zc_history_len, zc->zc_iflags);
1638 1639 }
1639 1640
1640 1641 spa_close(spa, FTAG);
1641 1642 kmem_free(hist_buf, size);
1642 1643 return (error);
1643 1644 }
1644 1645
1645 1646 static int
1646 1647 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1647 1648 {
1648 1649 spa_t *spa;
1649 1650 int error;
1650 1651
1651 1652 error = spa_open(zc->zc_name, &spa, FTAG);
1652 1653 if (error == 0) {
1653 1654 error = spa_change_guid(spa);
1654 1655 spa_close(spa, FTAG);
1655 1656 }
1656 1657 return (error);
1657 1658 }
1658 1659
1659 1660 static int
1660 1661 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1661 1662 {
1662 1663 int error;
1663 1664
1664 1665 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
1665 1666 return (error);
1666 1667
1667 1668 return (0);
1668 1669 }
1669 1670
1670 1671 /*
1671 1672 * inputs:
1672 1673 * zc_name name of filesystem
1673 1674 * zc_obj object to find
1674 1675 *
1675 1676 * outputs:
1676 1677 * zc_value name of object
1677 1678 */
1678 1679 static int
1679 1680 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1680 1681 {
1681 1682 objset_t *os;
1682 1683 int error;
1683 1684
1684 1685 /* XXX reading from objset not owned */
1685 1686 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1686 1687 return (error);
1687 1688 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1688 1689 dmu_objset_rele(os, FTAG);
1689 1690 return (EINVAL);
1690 1691 }
1691 1692 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1692 1693 sizeof (zc->zc_value));
1693 1694 dmu_objset_rele(os, FTAG);
1694 1695
1695 1696 return (error);
1696 1697 }
1697 1698
1698 1699 /*
1699 1700 * inputs:
1700 1701 * zc_name name of filesystem
1701 1702 * zc_obj object to find
1702 1703 *
1703 1704 * outputs:
1704 1705 * zc_stat stats on object
1705 1706 * zc_value path to object
1706 1707 */
1707 1708 static int
1708 1709 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1709 1710 {
1710 1711 objset_t *os;
1711 1712 int error;
1712 1713
1713 1714 /* XXX reading from objset not owned */
1714 1715 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1715 1716 return (error);
1716 1717 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1717 1718 dmu_objset_rele(os, FTAG);
1718 1719 return (EINVAL);
1719 1720 }
1720 1721 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1721 1722 sizeof (zc->zc_value));
1722 1723 dmu_objset_rele(os, FTAG);
1723 1724
1724 1725 return (error);
1725 1726 }
1726 1727
1727 1728 static int
1728 1729 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1729 1730 {
1730 1731 spa_t *spa;
1731 1732 int error;
1732 1733 nvlist_t *config, **l2cache, **spares;
1733 1734 uint_t nl2cache = 0, nspares = 0;
1734 1735
1735 1736 error = spa_open(zc->zc_name, &spa, FTAG);
1736 1737 if (error != 0)
1737 1738 return (error);
1738 1739
1739 1740 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1740 1741 zc->zc_iflags, &config);
1741 1742 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1742 1743 &l2cache, &nl2cache);
1743 1744
1744 1745 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1745 1746 &spares, &nspares);
1746 1747
1747 1748 /*
1748 1749 * A root pool with concatenated devices is not supported.
1749 1750 * Thus, can not add a device to a root pool.
1750 1751 *
1751 1752 * Intent log device can not be added to a rootpool because
1752 1753 * during mountroot, zil is replayed, a seperated log device
1753 1754 * can not be accessed during the mountroot time.
1754 1755 *
1755 1756 * l2cache and spare devices are ok to be added to a rootpool.
1756 1757 */
1757 1758 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1758 1759 nvlist_free(config);
1759 1760 spa_close(spa, FTAG);
1760 1761 return (EDOM);
1761 1762 }
1762 1763
1763 1764 if (error == 0) {
1764 1765 error = spa_vdev_add(spa, config);
1765 1766 nvlist_free(config);
1766 1767 }
1767 1768 spa_close(spa, FTAG);
1768 1769 return (error);
1769 1770 }
1770 1771
1771 1772 /*
1772 1773 * inputs:
1773 1774 * zc_name name of the pool
1774 1775 * zc_nvlist_conf nvlist of devices to remove
1775 1776 * zc_cookie to stop the remove?
1776 1777 */
1777 1778 static int
1778 1779 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1779 1780 {
1780 1781 spa_t *spa;
1781 1782 int error;
1782 1783
1783 1784 error = spa_open(zc->zc_name, &spa, FTAG);
1784 1785 if (error != 0)
1785 1786 return (error);
1786 1787 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1787 1788 spa_close(spa, FTAG);
1788 1789 return (error);
1789 1790 }
1790 1791
1791 1792 static int
1792 1793 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1793 1794 {
1794 1795 spa_t *spa;
1795 1796 int error;
1796 1797 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1797 1798
1798 1799 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1799 1800 return (error);
1800 1801 switch (zc->zc_cookie) {
1801 1802 case VDEV_STATE_ONLINE:
1802 1803 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1803 1804 break;
1804 1805
1805 1806 case VDEV_STATE_OFFLINE:
1806 1807 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1807 1808 break;
1808 1809
1809 1810 case VDEV_STATE_FAULTED:
1810 1811 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1811 1812 zc->zc_obj != VDEV_AUX_EXTERNAL)
1812 1813 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1813 1814
1814 1815 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1815 1816 break;
1816 1817
1817 1818 case VDEV_STATE_DEGRADED:
1818 1819 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1819 1820 zc->zc_obj != VDEV_AUX_EXTERNAL)
1820 1821 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1821 1822
1822 1823 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1823 1824 break;
1824 1825
1825 1826 default:
1826 1827 error = EINVAL;
1827 1828 }
1828 1829 zc->zc_cookie = newstate;
1829 1830 spa_close(spa, FTAG);
1830 1831 return (error);
1831 1832 }
1832 1833
1833 1834 static int
1834 1835 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1835 1836 {
1836 1837 spa_t *spa;
1837 1838 int replacing = zc->zc_cookie;
1838 1839 nvlist_t *config;
1839 1840 int error;
1840 1841
1841 1842 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1842 1843 return (error);
1843 1844
1844 1845 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1845 1846 zc->zc_iflags, &config)) == 0) {
1846 1847 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1847 1848 nvlist_free(config);
1848 1849 }
1849 1850
1850 1851 spa_close(spa, FTAG);
1851 1852 return (error);
1852 1853 }
1853 1854
1854 1855 static int
1855 1856 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1856 1857 {
1857 1858 spa_t *spa;
1858 1859 int error;
1859 1860
1860 1861 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1861 1862 return (error);
1862 1863
1863 1864 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1864 1865
1865 1866 spa_close(spa, FTAG);
1866 1867 return (error);
1867 1868 }
1868 1869
1869 1870 static int
1870 1871 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1871 1872 {
1872 1873 spa_t *spa;
1873 1874 nvlist_t *config, *props = NULL;
1874 1875 int error;
1875 1876 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1876 1877
1877 1878 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1878 1879 return (error);
1879 1880
1880 1881 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1881 1882 zc->zc_iflags, &config)) {
1882 1883 spa_close(spa, FTAG);
1883 1884 return (error);
1884 1885 }
1885 1886
1886 1887 if (zc->zc_nvlist_src_size != 0 && (error =
1887 1888 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1888 1889 zc->zc_iflags, &props))) {
1889 1890 spa_close(spa, FTAG);
1890 1891 nvlist_free(config);
1891 1892 return (error);
1892 1893 }
1893 1894
1894 1895 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1895 1896
1896 1897 spa_close(spa, FTAG);
1897 1898
1898 1899 nvlist_free(config);
1899 1900 nvlist_free(props);
1900 1901
1901 1902 return (error);
1902 1903 }
1903 1904
1904 1905 static int
1905 1906 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1906 1907 {
1907 1908 spa_t *spa;
1908 1909 char *path = zc->zc_value;
1909 1910 uint64_t guid = zc->zc_guid;
1910 1911 int error;
1911 1912
1912 1913 error = spa_open(zc->zc_name, &spa, FTAG);
1913 1914 if (error != 0)
1914 1915 return (error);
1915 1916
1916 1917 error = spa_vdev_setpath(spa, guid, path);
1917 1918 spa_close(spa, FTAG);
1918 1919 return (error);
1919 1920 }
1920 1921
1921 1922 static int
1922 1923 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1923 1924 {
1924 1925 spa_t *spa;
1925 1926 char *fru = zc->zc_value;
1926 1927 uint64_t guid = zc->zc_guid;
1927 1928 int error;
1928 1929
1929 1930 error = spa_open(zc->zc_name, &spa, FTAG);
1930 1931 if (error != 0)
1931 1932 return (error);
1932 1933
1933 1934 error = spa_vdev_setfru(spa, guid, fru);
1934 1935 spa_close(spa, FTAG);
1935 1936 return (error);
1936 1937 }
1937 1938
1938 1939 static int
1939 1940 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1940 1941 {
1941 1942 int error = 0;
1942 1943 nvlist_t *nv;
1943 1944
1944 1945 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1945 1946
1946 1947 if (zc->zc_nvlist_dst != 0 &&
1947 1948 (error = dsl_prop_get_all(os, &nv)) == 0) {
1948 1949 dmu_objset_stats(os, nv);
1949 1950 /*
1950 1951 * NB: zvol_get_stats() will read the objset contents,
1951 1952 * which we aren't supposed to do with a
1952 1953 * DS_MODE_USER hold, because it could be
1953 1954 * inconsistent. So this is a bit of a workaround...
1954 1955 * XXX reading with out owning
1955 1956 */
1956 1957 if (!zc->zc_objset_stats.dds_inconsistent &&
1957 1958 dmu_objset_type(os) == DMU_OST_ZVOL) {
1958 1959 error = zvol_get_stats(os, nv);
1959 1960 if (error == EIO)
1960 1961 return (error);
1961 1962 VERIFY0(error);
1962 1963 }
1963 1964 error = put_nvlist(zc, nv);
1964 1965 nvlist_free(nv);
1965 1966 }
1966 1967
1967 1968 return (error);
1968 1969 }
1969 1970
1970 1971 /*
1971 1972 * inputs:
1972 1973 * zc_name name of filesystem
1973 1974 * zc_nvlist_dst_size size of buffer for property nvlist
1974 1975 *
1975 1976 * outputs:
1976 1977 * zc_objset_stats stats
1977 1978 * zc_nvlist_dst property nvlist
1978 1979 * zc_nvlist_dst_size size of property nvlist
1979 1980 */
1980 1981 static int
1981 1982 zfs_ioc_objset_stats(zfs_cmd_t *zc)
1982 1983 {
1983 1984 objset_t *os = NULL;
1984 1985 int error;
1985 1986
1986 1987 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
1987 1988 return (error);
1988 1989
1989 1990 error = zfs_ioc_objset_stats_impl(zc, os);
1990 1991
1991 1992 dmu_objset_rele(os, FTAG);
1992 1993
1993 1994 return (error);
1994 1995 }
1995 1996
1996 1997 /*
1997 1998 * inputs:
1998 1999 * zc_name name of filesystem
1999 2000 * zc_nvlist_dst_size size of buffer for property nvlist
2000 2001 *
2001 2002 * outputs:
2002 2003 * zc_nvlist_dst received property nvlist
2003 2004 * zc_nvlist_dst_size size of received property nvlist
2004 2005 *
2005 2006 * Gets received properties (distinct from local properties on or after
2006 2007 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2007 2008 * local property values.
2008 2009 */
2009 2010 static int
2010 2011 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2011 2012 {
2012 2013 objset_t *os = NULL;
2013 2014 int error;
2014 2015 nvlist_t *nv;
2015 2016
2016 2017 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
2017 2018 return (error);
2018 2019
2019 2020 /*
2020 2021 * Without this check, we would return local property values if the
2021 2022 * caller has not already received properties on or after
2022 2023 * SPA_VERSION_RECVD_PROPS.
2023 2024 */
2024 2025 if (!dsl_prop_get_hasrecvd(os)) {
2025 2026 dmu_objset_rele(os, FTAG);
2026 2027 return (ENOTSUP);
2027 2028 }
2028 2029
2029 2030 if (zc->zc_nvlist_dst != 0 &&
2030 2031 (error = dsl_prop_get_received(os, &nv)) == 0) {
2031 2032 error = put_nvlist(zc, nv);
2032 2033 nvlist_free(nv);
2033 2034 }
2034 2035
2035 2036 dmu_objset_rele(os, FTAG);
2036 2037 return (error);
2037 2038 }
2038 2039
2039 2040 static int
2040 2041 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2041 2042 {
2042 2043 uint64_t value;
2043 2044 int error;
2044 2045
2045 2046 /*
2046 2047 * zfs_get_zplprop() will either find a value or give us
2047 2048 * the default value (if there is one).
2048 2049 */
2049 2050 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2050 2051 return (error);
2051 2052 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2052 2053 return (0);
2053 2054 }
2054 2055
2055 2056 /*
2056 2057 * inputs:
2057 2058 * zc_name name of filesystem
2058 2059 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2059 2060 *
2060 2061 * outputs:
2061 2062 * zc_nvlist_dst zpl property nvlist
2062 2063 * zc_nvlist_dst_size size of zpl property nvlist
2063 2064 */
2064 2065 static int
2065 2066 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2066 2067 {
2067 2068 objset_t *os;
2068 2069 int err;
2069 2070
2070 2071 /* XXX reading without owning */
2071 2072 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2072 2073 return (err);
2073 2074
2074 2075 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2075 2076
2076 2077 /*
2077 2078 * NB: nvl_add_zplprop() will read the objset contents,
2078 2079 * which we aren't supposed to do with a DS_MODE_USER
2079 2080 * hold, because it could be inconsistent.
2080 2081 */
2081 2082 if (zc->zc_nvlist_dst != NULL &&
2082 2083 !zc->zc_objset_stats.dds_inconsistent &&
2083 2084 dmu_objset_type(os) == DMU_OST_ZFS) {
2084 2085 nvlist_t *nv;
2085 2086
2086 2087 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2087 2088 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2088 2089 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2089 2090 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2090 2091 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2091 2092 err = put_nvlist(zc, nv);
2092 2093 nvlist_free(nv);
2093 2094 } else {
2094 2095 err = ENOENT;
2095 2096 }
2096 2097 dmu_objset_rele(os, FTAG);
2097 2098 return (err);
2098 2099 }
2099 2100
2100 2101 static boolean_t
2101 2102 dataset_name_hidden(const char *name)
2102 2103 {
2103 2104 /*
2104 2105 * Skip over datasets that are not visible in this zone,
2105 2106 * internal datasets (which have a $ in their name), and
2106 2107 * temporary datasets (which have a % in their name).
2107 2108 */
2108 2109 if (strchr(name, '$') != NULL)
2109 2110 return (B_TRUE);
2110 2111 if (strchr(name, '%') != NULL)
2111 2112 return (B_TRUE);
2112 2113 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2113 2114 return (B_TRUE);
2114 2115 return (B_FALSE);
2115 2116 }
2116 2117
2117 2118 /*
2118 2119 * inputs:
2119 2120 * zc_name name of filesystem
2120 2121 * zc_cookie zap cursor
2121 2122 * zc_nvlist_dst_size size of buffer for property nvlist
2122 2123 *
2123 2124 * outputs:
2124 2125 * zc_name name of next filesystem
2125 2126 * zc_cookie zap cursor
2126 2127 * zc_objset_stats stats
2127 2128 * zc_nvlist_dst property nvlist
2128 2129 * zc_nvlist_dst_size size of property nvlist
2129 2130 */
2130 2131 static int
2131 2132 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2132 2133 {
2133 2134 objset_t *os;
2134 2135 int error;
2135 2136 char *p;
2136 2137 size_t orig_len = strlen(zc->zc_name);
2137 2138
2138 2139 top:
2139 2140 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2140 2141 if (error == ENOENT)
2141 2142 error = ESRCH;
2142 2143 return (error);
2143 2144 }
2144 2145
2145 2146 p = strrchr(zc->zc_name, '/');
2146 2147 if (p == NULL || p[1] != '\0')
2147 2148 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2148 2149 p = zc->zc_name + strlen(zc->zc_name);
2149 2150
2150 2151 /*
2151 2152 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0
2152 2153 * but is not declared void because its called by dmu_objset_find().
2153 2154 */
2154 2155 if (zc->zc_cookie == 0) {
2155 2156 uint64_t cookie = 0;
2156 2157 int len = sizeof (zc->zc_name) - (p - zc->zc_name);
2157 2158
2158 2159 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) {
2159 2160 if (!dataset_name_hidden(zc->zc_name))
2160 2161 (void) dmu_objset_prefetch(zc->zc_name, NULL);
2161 2162 }
2162 2163 }
2163 2164
2164 2165 do {
2165 2166 error = dmu_dir_list_next(os,
2166 2167 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2167 2168 NULL, &zc->zc_cookie);
2168 2169 if (error == ENOENT)
2169 2170 error = ESRCH;
2170 2171 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2171 2172 dmu_objset_rele(os, FTAG);
2172 2173
2173 2174 /*
2174 2175 * If it's an internal dataset (ie. with a '$' in its name),
2175 2176 * don't try to get stats for it, otherwise we'll return ENOENT.
2176 2177 */
2177 2178 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2178 2179 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2179 2180 if (error == ENOENT) {
2180 2181 /* We lost a race with destroy, get the next one. */
2181 2182 zc->zc_name[orig_len] = '\0';
2182 2183 goto top;
2183 2184 }
2184 2185 }
2185 2186 return (error);
2186 2187 }
2187 2188
2188 2189 /*
2189 2190 * inputs:
2190 2191 * zc_name name of filesystem
2191 2192 * zc_cookie zap cursor
2192 2193 * zc_nvlist_dst_size size of buffer for property nvlist
2193 2194 *
2194 2195 * outputs:
2195 2196 * zc_name name of next snapshot
2196 2197 * zc_objset_stats stats
2197 2198 * zc_nvlist_dst property nvlist
2198 2199 * zc_nvlist_dst_size size of property nvlist
2199 2200 */
2200 2201 static int
2201 2202 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2202 2203 {
2203 2204 objset_t *os;
2204 2205 int error;
2205 2206
2206 2207 top:
2207 2208 if (zc->zc_cookie == 0)
2208 2209 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
2209 2210 NULL, DS_FIND_SNAPSHOTS);
2210 2211
2211 2212 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2212 2213 if (error)
2213 2214 return (error == ENOENT ? ESRCH : error);
2214 2215
2215 2216 /*
2216 2217 * A dataset name of maximum length cannot have any snapshots,
2217 2218 * so exit immediately.
2218 2219 */
2219 2220 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2220 2221 dmu_objset_rele(os, FTAG);
2221 2222 return (ESRCH);
2222 2223 }
2223 2224
2224 2225 error = dmu_snapshot_list_next(os,
2225 2226 sizeof (zc->zc_name) - strlen(zc->zc_name),
2226 2227 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2227 2228 NULL);
2228 2229
2229 2230 if (error == 0) {
2230 2231 dsl_dataset_t *ds;
2231 2232 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2232 2233
2233 2234 /*
2234 2235 * Since we probably don't have a hold on this snapshot,
2235 2236 * it's possible that the objsetid could have been destroyed
2236 2237 * and reused for a new objset. It's OK if this happens during
2237 2238 * a zfs send operation, since the new createtxg will be
2238 2239 * beyond the range we're interested in.
2239 2240 */
2240 2241 rw_enter(&dp->dp_config_rwlock, RW_READER);
2241 2242 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2242 2243 rw_exit(&dp->dp_config_rwlock);
2243 2244 if (error) {
2244 2245 if (error == ENOENT) {
2245 2246 /* Racing with destroy, get the next one. */
2246 2247 *strchr(zc->zc_name, '@') = '\0';
2247 2248 dmu_objset_rele(os, FTAG);
2248 2249 goto top;
2249 2250 }
2250 2251 } else {
2251 2252 objset_t *ossnap;
2252 2253
2253 2254 error = dmu_objset_from_ds(ds, &ossnap);
2254 2255 if (error == 0)
2255 2256 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2256 2257 dsl_dataset_rele(ds, FTAG);
2257 2258 }
2258 2259 } else if (error == ENOENT) {
2259 2260 error = ESRCH;
2260 2261 }
2261 2262
2262 2263 dmu_objset_rele(os, FTAG);
2263 2264 /* if we failed, undo the @ that we tacked on to zc_name */
2264 2265 if (error)
2265 2266 *strchr(zc->zc_name, '@') = '\0';
2266 2267 return (error);
2267 2268 }
2268 2269
2269 2270 static int
2270 2271 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2271 2272 {
2272 2273 const char *propname = nvpair_name(pair);
2273 2274 uint64_t *valary;
2274 2275 unsigned int vallen;
2275 2276 const char *domain;
2276 2277 char *dash;
2277 2278 zfs_userquota_prop_t type;
2278 2279 uint64_t rid;
2279 2280 uint64_t quota;
2280 2281 zfsvfs_t *zfsvfs;
2281 2282 int err;
2282 2283
2283 2284 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2284 2285 nvlist_t *attrs;
2285 2286 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2286 2287 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2287 2288 &pair) != 0)
2288 2289 return (EINVAL);
2289 2290 }
2290 2291
2291 2292 /*
2292 2293 * A correctly constructed propname is encoded as
2293 2294 * userquota@<rid>-<domain>.
2294 2295 */
2295 2296 if ((dash = strchr(propname, '-')) == NULL ||
2296 2297 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2297 2298 vallen != 3)
2298 2299 return (EINVAL);
2299 2300
2300 2301 domain = dash + 1;
2301 2302 type = valary[0];
2302 2303 rid = valary[1];
2303 2304 quota = valary[2];
2304 2305
2305 2306 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2306 2307 if (err == 0) {
2307 2308 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2308 2309 zfsvfs_rele(zfsvfs, FTAG);
2309 2310 }
2310 2311
2311 2312 return (err);
2312 2313 }
2313 2314
2314 2315 /*
2315 2316 * If the named property is one that has a special function to set its value,
2316 2317 * return 0 on success and a positive error code on failure; otherwise if it is
2317 2318 * not one of the special properties handled by this function, return -1.
2318 2319 *
2319 2320 * XXX: It would be better for callers of the property interface if we handled
2320 2321 * these special cases in dsl_prop.c (in the dsl layer).
2321 2322 */
2322 2323 static int
2323 2324 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2324 2325 nvpair_t *pair)
2325 2326 {
2326 2327 const char *propname = nvpair_name(pair);
2327 2328 zfs_prop_t prop = zfs_name_to_prop(propname);
2328 2329 uint64_t intval;
2329 2330 int err;
2330 2331
2331 2332 if (prop == ZPROP_INVAL) {
2332 2333 if (zfs_prop_userquota(propname))
2333 2334 return (zfs_prop_set_userquota(dsname, pair));
2334 2335 return (-1);
2335 2336 }
2336 2337
2337 2338 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2338 2339 nvlist_t *attrs;
2339 2340 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2340 2341 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2341 2342 &pair) == 0);
2342 2343 }
2343 2344
2344 2345 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2345 2346 return (-1);
2346 2347
2347 2348 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2348 2349
2349 2350 switch (prop) {
2350 2351 case ZFS_PROP_QUOTA:
2351 2352 err = dsl_dir_set_quota(dsname, source, intval);
2352 2353 break;
2353 2354 case ZFS_PROP_REFQUOTA:
2354 2355 err = dsl_dataset_set_quota(dsname, source, intval);
2355 2356 break;
2356 2357 case ZFS_PROP_RESERVATION:
2357 2358 err = dsl_dir_set_reservation(dsname, source, intval);
2358 2359 break;
2359 2360 case ZFS_PROP_REFRESERVATION:
2360 2361 err = dsl_dataset_set_reservation(dsname, source, intval);
2361 2362 break;
2362 2363 case ZFS_PROP_VOLSIZE:
2363 2364 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip),
2364 2365 intval);
2365 2366 break;
2366 2367 case ZFS_PROP_VERSION:
2367 2368 {
2368 2369 zfsvfs_t *zfsvfs;
2369 2370
2370 2371 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2371 2372 break;
2372 2373
2373 2374 err = zfs_set_version(zfsvfs, intval);
2374 2375 zfsvfs_rele(zfsvfs, FTAG);
2375 2376
2376 2377 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2377 2378 zfs_cmd_t *zc;
2378 2379
2379 2380 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2380 2381 (void) strcpy(zc->zc_name, dsname);
2381 2382 (void) zfs_ioc_userspace_upgrade(zc);
2382 2383 kmem_free(zc, sizeof (zfs_cmd_t));
2383 2384 }
2384 2385 break;
2385 2386 }
2386 2387
2387 2388 default:
2388 2389 err = -1;
2389 2390 }
2390 2391
2391 2392 return (err);
2392 2393 }
2393 2394
2394 2395 /*
2395 2396 * This function is best effort. If it fails to set any of the given properties,
2396 2397 * it continues to set as many as it can and returns the last error
2397 2398 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2398 2399 * with the list of names of all the properties that failed along with the
2399 2400 * corresponding error numbers.
2400 2401 *
2401 2402 * If every property is set successfully, zero is returned and errlist is not
2402 2403 * modified.
2403 2404 */
2404 2405 int
2405 2406 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2406 2407 nvlist_t *errlist)
2407 2408 {
2408 2409 nvpair_t *pair;
2409 2410 nvpair_t *propval;
2410 2411 int rv = 0;
2411 2412 uint64_t intval;
2412 2413 char *strval;
2413 2414 nvlist_t *genericnvl = fnvlist_alloc();
2414 2415 nvlist_t *retrynvl = fnvlist_alloc();
2415 2416
2416 2417 retry:
2417 2418 pair = NULL;
2418 2419 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2419 2420 const char *propname = nvpair_name(pair);
2420 2421 zfs_prop_t prop = zfs_name_to_prop(propname);
2421 2422 int err = 0;
2422 2423
2423 2424 /* decode the property value */
2424 2425 propval = pair;
2425 2426 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2426 2427 nvlist_t *attrs;
2427 2428 attrs = fnvpair_value_nvlist(pair);
2428 2429 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2429 2430 &propval) != 0)
2430 2431 err = EINVAL;
2431 2432 }
2432 2433
2433 2434 /* Validate value type */
2434 2435 if (err == 0 && prop == ZPROP_INVAL) {
2435 2436 if (zfs_prop_user(propname)) {
2436 2437 if (nvpair_type(propval) != DATA_TYPE_STRING)
2437 2438 err = EINVAL;
2438 2439 } else if (zfs_prop_userquota(propname)) {
2439 2440 if (nvpair_type(propval) !=
2440 2441 DATA_TYPE_UINT64_ARRAY)
2441 2442 err = EINVAL;
2442 2443 } else {
2443 2444 err = EINVAL;
2444 2445 }
2445 2446 } else if (err == 0) {
2446 2447 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2447 2448 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2448 2449 err = EINVAL;
2449 2450 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2450 2451 const char *unused;
2451 2452
2452 2453 intval = fnvpair_value_uint64(propval);
2453 2454
2454 2455 switch (zfs_prop_get_type(prop)) {
2455 2456 case PROP_TYPE_NUMBER:
2456 2457 break;
2457 2458 case PROP_TYPE_STRING:
2458 2459 err = EINVAL;
2459 2460 break;
2460 2461 case PROP_TYPE_INDEX:
2461 2462 if (zfs_prop_index_to_string(prop,
2462 2463 intval, &unused) != 0)
2463 2464 err = EINVAL;
2464 2465 break;
2465 2466 default:
2466 2467 cmn_err(CE_PANIC,
2467 2468 "unknown property type");
2468 2469 }
2469 2470 } else {
2470 2471 err = EINVAL;
2471 2472 }
2472 2473 }
2473 2474
2474 2475 /* Validate permissions */
2475 2476 if (err == 0)
2476 2477 err = zfs_check_settable(dsname, pair, CRED());
2477 2478
2478 2479 if (err == 0) {
2479 2480 err = zfs_prop_set_special(dsname, source, pair);
2480 2481 if (err == -1) {
2481 2482 /*
2482 2483 * For better performance we build up a list of
2483 2484 * properties to set in a single transaction.
2484 2485 */
2485 2486 err = nvlist_add_nvpair(genericnvl, pair);
2486 2487 } else if (err != 0 && nvl != retrynvl) {
2487 2488 /*
2488 2489 * This may be a spurious error caused by
2489 2490 * receiving quota and reservation out of order.
2490 2491 * Try again in a second pass.
2491 2492 */
2492 2493 err = nvlist_add_nvpair(retrynvl, pair);
2493 2494 }
2494 2495 }
2495 2496
2496 2497 if (err != 0) {
2497 2498 if (errlist != NULL)
2498 2499 fnvlist_add_int32(errlist, propname, err);
2499 2500 rv = err;
2500 2501 }
2501 2502 }
2502 2503
2503 2504 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2504 2505 nvl = retrynvl;
2505 2506 goto retry;
2506 2507 }
2507 2508
2508 2509 if (!nvlist_empty(genericnvl) &&
2509 2510 dsl_props_set(dsname, source, genericnvl) != 0) {
2510 2511 /*
2511 2512 * If this fails, we still want to set as many properties as we
2512 2513 * can, so try setting them individually.
2513 2514 */
2514 2515 pair = NULL;
2515 2516 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2516 2517 const char *propname = nvpair_name(pair);
2517 2518 int err = 0;
2518 2519
2519 2520 propval = pair;
2520 2521 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2521 2522 nvlist_t *attrs;
2522 2523 attrs = fnvpair_value_nvlist(pair);
2523 2524 propval = fnvlist_lookup_nvpair(attrs,
2524 2525 ZPROP_VALUE);
2525 2526 }
2526 2527
2527 2528 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2528 2529 strval = fnvpair_value_string(propval);
2529 2530 err = dsl_prop_set(dsname, propname, source, 1,
2530 2531 strlen(strval) + 1, strval);
2531 2532 } else {
2532 2533 intval = fnvpair_value_uint64(propval);
2533 2534 err = dsl_prop_set(dsname, propname, source, 8,
2534 2535 1, &intval);
2535 2536 }
2536 2537
2537 2538 if (err != 0) {
2538 2539 if (errlist != NULL) {
2539 2540 fnvlist_add_int32(errlist, propname,
2540 2541 err);
2541 2542 }
2542 2543 rv = err;
2543 2544 }
2544 2545 }
2545 2546 }
2546 2547 nvlist_free(genericnvl);
2547 2548 nvlist_free(retrynvl);
2548 2549
2549 2550 return (rv);
2550 2551 }
2551 2552
2552 2553 /*
2553 2554 * Check that all the properties are valid user properties.
2554 2555 */
2555 2556 static int
2556 2557 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2557 2558 {
2558 2559 nvpair_t *pair = NULL;
2559 2560 int error = 0;
2560 2561
2561 2562 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2562 2563 const char *propname = nvpair_name(pair);
2563 2564 char *valstr;
2564 2565
2565 2566 if (!zfs_prop_user(propname) ||
2566 2567 nvpair_type(pair) != DATA_TYPE_STRING)
2567 2568 return (EINVAL);
2568 2569
2569 2570 if (error = zfs_secpolicy_write_perms(fsname,
2570 2571 ZFS_DELEG_PERM_USERPROP, CRED()))
2571 2572 return (error);
2572 2573
2573 2574 if (strlen(propname) >= ZAP_MAXNAMELEN)
2574 2575 return (ENAMETOOLONG);
2575 2576
2576 2577 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2577 2578 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2578 2579 return (E2BIG);
2579 2580 }
2580 2581 return (0);
2581 2582 }
2582 2583
2583 2584 static void
2584 2585 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2585 2586 {
2586 2587 nvpair_t *pair;
2587 2588
2588 2589 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2589 2590
2590 2591 pair = NULL;
2591 2592 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2592 2593 if (nvlist_exists(skipped, nvpair_name(pair)))
2593 2594 continue;
2594 2595
2595 2596 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2596 2597 }
2597 2598 }
2598 2599
2599 2600 static int
2600 2601 clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
2601 2602 nvlist_t *skipped)
2602 2603 {
2603 2604 int err = 0;
2604 2605 nvlist_t *cleared_props = NULL;
2605 2606 props_skip(props, skipped, &cleared_props);
2606 2607 if (!nvlist_empty(cleared_props)) {
2607 2608 /*
2608 2609 * Acts on local properties until the dataset has received
2609 2610 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2610 2611 */
2611 2612 zprop_source_t flags = (ZPROP_SRC_NONE |
2612 2613 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
2613 2614 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
2614 2615 }
2615 2616 nvlist_free(cleared_props);
2616 2617 return (err);
2617 2618 }
2618 2619
2619 2620 /*
2620 2621 * inputs:
2621 2622 * zc_name name of filesystem
2622 2623 * zc_value name of property to set
2623 2624 * zc_nvlist_src{_size} nvlist of properties to apply
2624 2625 * zc_cookie received properties flag
2625 2626 *
2626 2627 * outputs:
2627 2628 * zc_nvlist_dst{_size} error for each unapplied received property
2628 2629 */
2629 2630 static int
2630 2631 zfs_ioc_set_prop(zfs_cmd_t *zc)
2631 2632 {
2632 2633 nvlist_t *nvl;
2633 2634 boolean_t received = zc->zc_cookie;
2634 2635 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2635 2636 ZPROP_SRC_LOCAL);
2636 2637 nvlist_t *errors;
2637 2638 int error;
2638 2639
2639 2640 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2640 2641 zc->zc_iflags, &nvl)) != 0)
2641 2642 return (error);
2642 2643
2643 2644 if (received) {
2644 2645 nvlist_t *origprops;
2645 2646 objset_t *os;
2646 2647
2647 2648 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
2648 2649 if (dsl_prop_get_received(os, &origprops) == 0) {
2649 2650 (void) clear_received_props(os,
2650 2651 zc->zc_name, origprops, nvl);
2651 2652 nvlist_free(origprops);
2652 2653 }
2653 2654
2654 2655 dsl_prop_set_hasrecvd(os);
2655 2656 dmu_objset_rele(os, FTAG);
2656 2657 }
2657 2658 }
2658 2659
2659 2660 errors = fnvlist_alloc();
2660 2661 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2661 2662
2662 2663 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2663 2664 (void) put_nvlist(zc, errors);
2664 2665 }
2665 2666
2666 2667 nvlist_free(errors);
2667 2668 nvlist_free(nvl);
2668 2669 return (error);
2669 2670 }
2670 2671
2671 2672 /*
2672 2673 * inputs:
2673 2674 * zc_name name of filesystem
2674 2675 * zc_value name of property to inherit
2675 2676 * zc_cookie revert to received value if TRUE
2676 2677 *
2677 2678 * outputs: none
2678 2679 */
2679 2680 static int
2680 2681 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2681 2682 {
2682 2683 const char *propname = zc->zc_value;
2683 2684 zfs_prop_t prop = zfs_name_to_prop(propname);
2684 2685 boolean_t received = zc->zc_cookie;
2685 2686 zprop_source_t source = (received
2686 2687 ? ZPROP_SRC_NONE /* revert to received value, if any */
2687 2688 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2688 2689
2689 2690 if (received) {
2690 2691 nvlist_t *dummy;
2691 2692 nvpair_t *pair;
2692 2693 zprop_type_t type;
2693 2694 int err;
2694 2695
2695 2696 /*
2696 2697 * zfs_prop_set_special() expects properties in the form of an
2697 2698 * nvpair with type info.
2698 2699 */
2699 2700 if (prop == ZPROP_INVAL) {
2700 2701 if (!zfs_prop_user(propname))
2701 2702 return (EINVAL);
2702 2703
2703 2704 type = PROP_TYPE_STRING;
2704 2705 } else if (prop == ZFS_PROP_VOLSIZE ||
2705 2706 prop == ZFS_PROP_VERSION) {
2706 2707 return (EINVAL);
2707 2708 } else {
2708 2709 type = zfs_prop_get_type(prop);
2709 2710 }
2710 2711
2711 2712 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2712 2713
2713 2714 switch (type) {
2714 2715 case PROP_TYPE_STRING:
2715 2716 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2716 2717 break;
2717 2718 case PROP_TYPE_NUMBER:
2718 2719 case PROP_TYPE_INDEX:
2719 2720 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2720 2721 break;
2721 2722 default:
2722 2723 nvlist_free(dummy);
2723 2724 return (EINVAL);
2724 2725 }
2725 2726
2726 2727 pair = nvlist_next_nvpair(dummy, NULL);
2727 2728 err = zfs_prop_set_special(zc->zc_name, source, pair);
2728 2729 nvlist_free(dummy);
2729 2730 if (err != -1)
2730 2731 return (err); /* special property already handled */
2731 2732 } else {
2732 2733 /*
2733 2734 * Only check this in the non-received case. We want to allow
2734 2735 * 'inherit -S' to revert non-inheritable properties like quota
2735 2736 * and reservation to the received or default values even though
2736 2737 * they are not considered inheritable.
2737 2738 */
2738 2739 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2739 2740 return (EINVAL);
2740 2741 }
2741 2742
2742 2743 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2743 2744 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
2744 2745 }
2745 2746
2746 2747 static int
2747 2748 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2748 2749 {
2749 2750 nvlist_t *props;
2750 2751 spa_t *spa;
2751 2752 int error;
2752 2753 nvpair_t *pair;
2753 2754
2754 2755 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2755 2756 zc->zc_iflags, &props))
2756 2757 return (error);
2757 2758
2758 2759 /*
2759 2760 * If the only property is the configfile, then just do a spa_lookup()
2760 2761 * to handle the faulted case.
2761 2762 */
2762 2763 pair = nvlist_next_nvpair(props, NULL);
2763 2764 if (pair != NULL && strcmp(nvpair_name(pair),
2764 2765 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2765 2766 nvlist_next_nvpair(props, pair) == NULL) {
2766 2767 mutex_enter(&spa_namespace_lock);
2767 2768 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2768 2769 spa_configfile_set(spa, props, B_FALSE);
2769 2770 spa_config_sync(spa, B_FALSE, B_TRUE);
2770 2771 }
2771 2772 mutex_exit(&spa_namespace_lock);
2772 2773 if (spa != NULL) {
2773 2774 nvlist_free(props);
2774 2775 return (0);
2775 2776 }
2776 2777 }
2777 2778
2778 2779 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2779 2780 nvlist_free(props);
2780 2781 return (error);
2781 2782 }
2782 2783
2783 2784 error = spa_prop_set(spa, props);
2784 2785
2785 2786 nvlist_free(props);
2786 2787 spa_close(spa, FTAG);
2787 2788
2788 2789 return (error);
2789 2790 }
2790 2791
2791 2792 static int
2792 2793 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2793 2794 {
2794 2795 spa_t *spa;
2795 2796 int error;
2796 2797 nvlist_t *nvp = NULL;
2797 2798
2798 2799 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2799 2800 /*
2800 2801 * If the pool is faulted, there may be properties we can still
2801 2802 * get (such as altroot and cachefile), so attempt to get them
2802 2803 * anyway.
2803 2804 */
2804 2805 mutex_enter(&spa_namespace_lock);
2805 2806 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2806 2807 error = spa_prop_get(spa, &nvp);
2807 2808 mutex_exit(&spa_namespace_lock);
2808 2809 } else {
2809 2810 error = spa_prop_get(spa, &nvp);
2810 2811 spa_close(spa, FTAG);
2811 2812 }
2812 2813
2813 2814 if (error == 0 && zc->zc_nvlist_dst != NULL)
2814 2815 error = put_nvlist(zc, nvp);
2815 2816 else
2816 2817 error = EFAULT;
2817 2818
2818 2819 nvlist_free(nvp);
2819 2820 return (error);
2820 2821 }
2821 2822
2822 2823 /*
2823 2824 * inputs:
2824 2825 * zc_name name of filesystem
2825 2826 * zc_nvlist_src{_size} nvlist of delegated permissions
2826 2827 * zc_perm_action allow/unallow flag
2827 2828 *
2828 2829 * outputs: none
2829 2830 */
2830 2831 static int
2831 2832 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2832 2833 {
2833 2834 int error;
2834 2835 nvlist_t *fsaclnv = NULL;
2835 2836
2836 2837 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2837 2838 zc->zc_iflags, &fsaclnv)) != 0)
2838 2839 return (error);
2839 2840
2840 2841 /*
2841 2842 * Verify nvlist is constructed correctly
2842 2843 */
2843 2844 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2844 2845 nvlist_free(fsaclnv);
2845 2846 return (EINVAL);
2846 2847 }
2847 2848
2848 2849 /*
2849 2850 * If we don't have PRIV_SYS_MOUNT, then validate
2850 2851 * that user is allowed to hand out each permission in
2851 2852 * the nvlist(s)
2852 2853 */
2853 2854
2854 2855 error = secpolicy_zfs(CRED());
2855 2856 if (error) {
2856 2857 if (zc->zc_perm_action == B_FALSE) {
2857 2858 error = dsl_deleg_can_allow(zc->zc_name,
2858 2859 fsaclnv, CRED());
2859 2860 } else {
2860 2861 error = dsl_deleg_can_unallow(zc->zc_name,
2861 2862 fsaclnv, CRED());
2862 2863 }
2863 2864 }
2864 2865
2865 2866 if (error == 0)
2866 2867 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2867 2868
2868 2869 nvlist_free(fsaclnv);
2869 2870 return (error);
2870 2871 }
2871 2872
2872 2873 /*
2873 2874 * inputs:
2874 2875 * zc_name name of filesystem
2875 2876 *
2876 2877 * outputs:
2877 2878 * zc_nvlist_src{_size} nvlist of delegated permissions
2878 2879 */
2879 2880 static int
2880 2881 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2881 2882 {
2882 2883 nvlist_t *nvp;
2883 2884 int error;
2884 2885
2885 2886 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2886 2887 error = put_nvlist(zc, nvp);
2887 2888 nvlist_free(nvp);
2888 2889 }
2889 2890
2890 2891 return (error);
2891 2892 }
2892 2893
2893 2894 /*
2894 2895 * Search the vfs list for a specified resource. Returns a pointer to it
2895 2896 * or NULL if no suitable entry is found. The caller of this routine
2896 2897 * is responsible for releasing the returned vfs pointer.
2897 2898 */
2898 2899 static vfs_t *
2899 2900 zfs_get_vfs(const char *resource)
2900 2901 {
2901 2902 struct vfs *vfsp;
2902 2903 struct vfs *vfs_found = NULL;
2903 2904
2904 2905 vfs_list_read_lock();
2905 2906 vfsp = rootvfs;
2906 2907 do {
2907 2908 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2908 2909 VFS_HOLD(vfsp);
2909 2910 vfs_found = vfsp;
2910 2911 break;
2911 2912 }
2912 2913 vfsp = vfsp->vfs_next;
2913 2914 } while (vfsp != rootvfs);
2914 2915 vfs_list_unlock();
2915 2916 return (vfs_found);
2916 2917 }
2917 2918
2918 2919 /* ARGSUSED */
2919 2920 static void
2920 2921 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2921 2922 {
2922 2923 zfs_creat_t *zct = arg;
2923 2924
2924 2925 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2925 2926 }
2926 2927
2927 2928 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2928 2929
2929 2930 /*
2930 2931 * inputs:
2931 2932 * createprops list of properties requested by creator
2932 2933 * default_zplver zpl version to use if unspecified in createprops
2933 2934 * fuids_ok fuids allowed in this version of the spa?
2934 2935 * os parent objset pointer (NULL if root fs)
2935 2936 *
2936 2937 * outputs:
2937 2938 * zplprops values for the zplprops we attach to the master node object
2938 2939 * is_ci true if requested file system will be purely case-insensitive
2939 2940 *
2940 2941 * Determine the settings for utf8only, normalization and
2941 2942 * casesensitivity. Specific values may have been requested by the
2942 2943 * creator and/or we can inherit values from the parent dataset. If
2943 2944 * the file system is of too early a vintage, a creator can not
2944 2945 * request settings for these properties, even if the requested
2945 2946 * setting is the default value. We don't actually want to create dsl
2946 2947 * properties for these, so remove them from the source nvlist after
2947 2948 * processing.
2948 2949 */
2949 2950 static int
2950 2951 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2951 2952 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2952 2953 nvlist_t *zplprops, boolean_t *is_ci)
2953 2954 {
2954 2955 uint64_t sense = ZFS_PROP_UNDEFINED;
2955 2956 uint64_t norm = ZFS_PROP_UNDEFINED;
2956 2957 uint64_t u8 = ZFS_PROP_UNDEFINED;
2957 2958
2958 2959 ASSERT(zplprops != NULL);
2959 2960
2960 2961 /*
2961 2962 * Pull out creator prop choices, if any.
2962 2963 */
2963 2964 if (createprops) {
2964 2965 (void) nvlist_lookup_uint64(createprops,
2965 2966 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
2966 2967 (void) nvlist_lookup_uint64(createprops,
2967 2968 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
2968 2969 (void) nvlist_remove_all(createprops,
2969 2970 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
2970 2971 (void) nvlist_lookup_uint64(createprops,
2971 2972 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
2972 2973 (void) nvlist_remove_all(createprops,
2973 2974 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
2974 2975 (void) nvlist_lookup_uint64(createprops,
2975 2976 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
2976 2977 (void) nvlist_remove_all(createprops,
2977 2978 zfs_prop_to_name(ZFS_PROP_CASE));
2978 2979 }
2979 2980
2980 2981 /*
2981 2982 * If the zpl version requested is whacky or the file system
2982 2983 * or pool is version is too "young" to support normalization
2983 2984 * and the creator tried to set a value for one of the props,
2984 2985 * error out.
2985 2986 */
2986 2987 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
2987 2988 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
2988 2989 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
2989 2990 (zplver < ZPL_VERSION_NORMALIZATION &&
2990 2991 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
2991 2992 sense != ZFS_PROP_UNDEFINED)))
2992 2993 return (ENOTSUP);
2993 2994
2994 2995 /*
2995 2996 * Put the version in the zplprops
2996 2997 */
2997 2998 VERIFY(nvlist_add_uint64(zplprops,
2998 2999 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
2999 3000
3000 3001 if (norm == ZFS_PROP_UNDEFINED)
3001 3002 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3002 3003 VERIFY(nvlist_add_uint64(zplprops,
3003 3004 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3004 3005
3005 3006 /*
3006 3007 * If we're normalizing, names must always be valid UTF-8 strings.
3007 3008 */
3008 3009 if (norm)
3009 3010 u8 = 1;
3010 3011 if (u8 == ZFS_PROP_UNDEFINED)
3011 3012 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3012 3013 VERIFY(nvlist_add_uint64(zplprops,
3013 3014 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3014 3015
3015 3016 if (sense == ZFS_PROP_UNDEFINED)
3016 3017 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3017 3018 VERIFY(nvlist_add_uint64(zplprops,
3018 3019 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3019 3020
3020 3021 if (is_ci)
3021 3022 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3022 3023
3023 3024 return (0);
3024 3025 }
3025 3026
3026 3027 static int
3027 3028 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3028 3029 nvlist_t *zplprops, boolean_t *is_ci)
3029 3030 {
3030 3031 boolean_t fuids_ok, sa_ok;
3031 3032 uint64_t zplver = ZPL_VERSION;
3032 3033 objset_t *os = NULL;
3033 3034 char parentname[MAXNAMELEN];
3034 3035 char *cp;
3035 3036 spa_t *spa;
3036 3037 uint64_t spa_vers;
3037 3038 int error;
3038 3039
3039 3040 (void) strlcpy(parentname, dataset, sizeof (parentname));
3040 3041 cp = strrchr(parentname, '/');
3041 3042 ASSERT(cp != NULL);
3042 3043 cp[0] = '\0';
3043 3044
3044 3045 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3045 3046 return (error);
3046 3047
3047 3048 spa_vers = spa_version(spa);
3048 3049 spa_close(spa, FTAG);
3049 3050
3050 3051 zplver = zfs_zpl_version_map(spa_vers);
3051 3052 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3052 3053 sa_ok = (zplver >= ZPL_VERSION_SA);
3053 3054
3054 3055 /*
3055 3056 * Open parent object set so we can inherit zplprop values.
3056 3057 */
3057 3058 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3058 3059 return (error);
3059 3060
3060 3061 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3061 3062 zplprops, is_ci);
3062 3063 dmu_objset_rele(os, FTAG);
3063 3064 return (error);
3064 3065 }
3065 3066
3066 3067 static int
3067 3068 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3068 3069 nvlist_t *zplprops, boolean_t *is_ci)
3069 3070 {
3070 3071 boolean_t fuids_ok;
3071 3072 boolean_t sa_ok;
3072 3073 uint64_t zplver = ZPL_VERSION;
3073 3074 int error;
3074 3075
3075 3076 zplver = zfs_zpl_version_map(spa_vers);
3076 3077 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3077 3078 sa_ok = (zplver >= ZPL_VERSION_SA);
3078 3079
3079 3080 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3080 3081 createprops, zplprops, is_ci);
3081 3082 return (error);
3082 3083 }
3083 3084
3084 3085 /*
3085 3086 * innvl: {
3086 3087 * "type" -> dmu_objset_type_t (int32)
3087 3088 * (optional) "props" -> { prop -> value }
3088 3089 * }
3089 3090 *
3090 3091 * outnvl: propname -> error code (int32)
3091 3092 */
3092 3093 static int
3093 3094 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3094 3095 {
3095 3096 int error = 0;
3096 3097 zfs_creat_t zct = { 0 };
3097 3098 nvlist_t *nvprops = NULL;
3098 3099 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3099 3100 int32_t type32;
3100 3101 dmu_objset_type_t type;
3101 3102 boolean_t is_insensitive = B_FALSE;
3102 3103
3103 3104 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3104 3105 return (EINVAL);
3105 3106 type = type32;
3106 3107 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3107 3108
3108 3109 switch (type) {
3109 3110 case DMU_OST_ZFS:
3110 3111 cbfunc = zfs_create_cb;
3111 3112 break;
3112 3113
3113 3114 case DMU_OST_ZVOL:
3114 3115 cbfunc = zvol_create_cb;
3115 3116 break;
3116 3117
3117 3118 default:
3118 3119 cbfunc = NULL;
3119 3120 break;
3120 3121 }
3121 3122 if (strchr(fsname, '@') ||
3122 3123 strchr(fsname, '%'))
3123 3124 return (EINVAL);
3124 3125
3125 3126 zct.zct_props = nvprops;
3126 3127
3127 3128 if (cbfunc == NULL)
3128 3129 return (EINVAL);
3129 3130
3130 3131 if (type == DMU_OST_ZVOL) {
3131 3132 uint64_t volsize, volblocksize;
3132 3133
3133 3134 if (nvprops == NULL)
3134 3135 return (EINVAL);
3135 3136 if (nvlist_lookup_uint64(nvprops,
3136 3137 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3137 3138 return (EINVAL);
3138 3139
3139 3140 if ((error = nvlist_lookup_uint64(nvprops,
3140 3141 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3141 3142 &volblocksize)) != 0 && error != ENOENT)
3142 3143 return (EINVAL);
3143 3144
3144 3145 if (error != 0)
3145 3146 volblocksize = zfs_prop_default_numeric(
3146 3147 ZFS_PROP_VOLBLOCKSIZE);
3147 3148
3148 3149 if ((error = zvol_check_volblocksize(
3149 3150 volblocksize)) != 0 ||
3150 3151 (error = zvol_check_volsize(volsize,
3151 3152 volblocksize)) != 0)
3152 3153 return (error);
3153 3154 } else if (type == DMU_OST_ZFS) {
3154 3155 int error;
3155 3156
3156 3157 /*
3157 3158 * We have to have normalization and
3158 3159 * case-folding flags correct when we do the
3159 3160 * file system creation, so go figure them out
3160 3161 * now.
3161 3162 */
3162 3163 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3163 3164 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3164 3165 error = zfs_fill_zplprops(fsname, nvprops,
3165 3166 zct.zct_zplprops, &is_insensitive);
3166 3167 if (error != 0) {
3167 3168 nvlist_free(zct.zct_zplprops);
3168 3169 return (error);
3169 3170 }
3170 3171 }
3171 3172
3172 3173 error = dmu_objset_create(fsname, type,
3173 3174 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3174 3175 nvlist_free(zct.zct_zplprops);
3175 3176
3176 3177 /*
3177 3178 * It would be nice to do this atomically.
3178 3179 */
3179 3180 if (error == 0) {
3180 3181 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3181 3182 nvprops, outnvl);
3182 3183 if (error != 0)
3183 3184 (void) dmu_objset_destroy(fsname, B_FALSE);
3184 3185 }
3185 3186 return (error);
3186 3187 }
3187 3188
3188 3189 /*
3189 3190 * innvl: {
3190 3191 * "origin" -> name of origin snapshot
3191 3192 * (optional) "props" -> { prop -> value }
3192 3193 * }
3193 3194 *
3194 3195 * outnvl: propname -> error code (int32)
3195 3196 */
3196 3197 static int
3197 3198 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3198 3199 {
3199 3200 int error = 0;
3200 3201 nvlist_t *nvprops = NULL;
3201 3202 char *origin_name;
3202 3203 dsl_dataset_t *origin;
3203 3204
3204 3205 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3205 3206 return (EINVAL);
3206 3207 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3207 3208
3208 3209 if (strchr(fsname, '@') ||
3209 3210 strchr(fsname, '%'))
3210 3211 return (EINVAL);
3211 3212
3212 3213 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3213 3214 return (EINVAL);
3214 3215
3215 3216 error = dsl_dataset_hold(origin_name, FTAG, &origin);
3216 3217 if (error)
3217 3218 return (error);
3218 3219
3219 3220 error = dmu_objset_clone(fsname, origin, 0);
3220 3221 dsl_dataset_rele(origin, FTAG);
3221 3222 if (error)
3222 3223 return (error);
3223 3224
3224 3225 /*
3225 3226 * It would be nice to do this atomically.
3226 3227 */
3227 3228 if (error == 0) {
3228 3229 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3229 3230 nvprops, outnvl);
3230 3231 if (error != 0)
3231 3232 (void) dmu_objset_destroy(fsname, B_FALSE);
3232 3233 }
3233 3234 return (error);
3234 3235 }
3235 3236
3236 3237 /*
3237 3238 * innvl: {
3238 3239 * "snaps" -> { snapshot1, snapshot2 }
3239 3240 * (optional) "props" -> { prop -> value (string) }
3240 3241 * }
3241 3242 *
3242 3243 * outnvl: snapshot -> error code (int32)
3243 3244 *
3244 3245 */
3245 3246 static int
3246 3247 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3247 3248 {
3248 3249 nvlist_t *snaps;
3249 3250 nvlist_t *props = NULL;
3250 3251 int error, poollen;
3251 3252 nvpair_t *pair;
3252 3253
3253 3254 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3254 3255 if ((error = zfs_check_userprops(poolname, props)) != 0)
3255 3256 return (error);
3256 3257
3257 3258 if (!nvlist_empty(props) &&
3258 3259 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3259 3260 return (ENOTSUP);
3260 3261
3261 3262 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3262 3263 return (EINVAL);
3263 3264 poollen = strlen(poolname);
3264 3265 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3265 3266 pair = nvlist_next_nvpair(snaps, pair)) {
3266 3267 const char *name = nvpair_name(pair);
3267 3268 const char *cp = strchr(name, '@');
3268 3269
3269 3270 /*
3270 3271 * The snap name must contain an @, and the part after it must
3271 3272 * contain only valid characters.
3272 3273 */
3273 3274 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3274 3275 return (EINVAL);
3275 3276
3276 3277 /*
3277 3278 * The snap must be in the specified pool.
3278 3279 */
3279 3280 if (strncmp(name, poolname, poollen) != 0 ||
3280 3281 (name[poollen] != '/' && name[poollen] != '@'))
3281 3282 return (EXDEV);
3282 3283
3283 3284 /* This must be the only snap of this fs. */
3284 3285 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3285 3286 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3286 3287 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3287 3288 == 0) {
3288 3289 return (EXDEV);
3289 3290 }
3290 3291 }
3291 3292 }
3292 3293
3293 3294 error = dmu_objset_snapshot(snaps, props, outnvl);
3294 3295 return (error);
3295 3296 }
3296 3297
3297 3298 /*
3298 3299 * innvl: "message" -> string
3299 3300 */
3300 3301 /* ARGSUSED */
3301 3302 static int
3302 3303 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3303 3304 {
3304 3305 char *message;
3305 3306 spa_t *spa;
3306 3307 int error;
3307 3308 char *poolname;
3308 3309
3309 3310 /*
3310 3311 * The poolname in the ioctl is not set, we get it from the TSD,
3311 3312 * which was set at the end of the last successful ioctl that allows
3312 3313 * logging. The secpolicy func already checked that it is set.
3313 3314 * Only one log ioctl is allowed after each successful ioctl, so
3314 3315 * we clear the TSD here.
3315 3316 */
3316 3317 poolname = tsd_get(zfs_allow_log_key);
3317 3318 (void) tsd_set(zfs_allow_log_key, NULL);
3318 3319 error = spa_open(poolname, &spa, FTAG);
3319 3320 strfree(poolname);
3320 3321 if (error != 0)
3321 3322 return (error);
3322 3323
3323 3324 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3324 3325 spa_close(spa, FTAG);
3325 3326 return (EINVAL);
3326 3327 }
3327 3328
3328 3329 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3329 3330 spa_close(spa, FTAG);
3330 3331 return (ENOTSUP);
3331 3332 }
3332 3333
3333 3334 error = spa_history_log(spa, message);
3334 3335 spa_close(spa, FTAG);
3335 3336 return (error);
3336 3337 }
3337 3338
3338 3339 /* ARGSUSED */
3339 3340 int
3340 3341 zfs_unmount_snap(const char *name, void *arg)
3341 3342 {
3342 3343 vfs_t *vfsp;
3343 3344 int err;
3344 3345
3345 3346 if (strchr(name, '@') == NULL)
3346 3347 return (0);
3347 3348
3348 3349 vfsp = zfs_get_vfs(name);
3349 3350 if (vfsp == NULL)
3350 3351 return (0);
3351 3352
3352 3353 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
3353 3354 VFS_RELE(vfsp);
3354 3355 return (err);
3355 3356 }
3356 3357 VFS_RELE(vfsp);
3357 3358
3358 3359 /*
3359 3360 * Always force the unmount for snapshots.
3360 3361 */
3361 3362 return (dounmount(vfsp, MS_FORCE, kcred));
3362 3363 }
3363 3364
3364 3365 /*
3365 3366 * innvl: {
3366 3367 * "snaps" -> { snapshot1, snapshot2 }
3367 3368 * (optional boolean) "defer"
3368 3369 * }
3369 3370 *
3370 3371 * outnvl: snapshot -> error code (int32)
3371 3372 *
3372 3373 */
3373 3374 static int
3374 3375 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3375 3376 {
3376 3377 int poollen;
3377 3378 nvlist_t *snaps;
3378 3379 nvpair_t *pair;
3379 3380 boolean_t defer;
3380 3381
3381 3382 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3382 3383 return (EINVAL);
3383 3384 defer = nvlist_exists(innvl, "defer");
3384 3385
3385 3386 poollen = strlen(poolname);
3386 3387 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3387 3388 pair = nvlist_next_nvpair(snaps, pair)) {
3388 3389 const char *name = nvpair_name(pair);
3389 3390
3390 3391 /*
3391 3392 * The snap must be in the specified pool.
3392 3393 */
3393 3394 if (strncmp(name, poolname, poollen) != 0 ||
3394 3395 (name[poollen] != '/' && name[poollen] != '@'))
3395 3396 return (EXDEV);
3396 3397
3397 3398 /*
3398 3399 * Ignore failures to unmount; dmu_snapshots_destroy_nvl()
3399 3400 * will deal with this gracefully (by filling in outnvl).
3400 3401 */
3401 3402 (void) zfs_unmount_snap(name, NULL);
3402 3403 }
3403 3404
3404 3405 return (dmu_snapshots_destroy_nvl(snaps, defer, outnvl));
3405 3406 }
3406 3407
3407 3408 /*
3408 3409 * inputs:
3409 3410 * zc_name name of dataset to destroy
3410 3411 * zc_objset_type type of objset
3411 3412 * zc_defer_destroy mark for deferred destroy
3412 3413 *
3413 3414 * outputs: none
3414 3415 */
3415 3416 static int
3416 3417 zfs_ioc_destroy(zfs_cmd_t *zc)
3417 3418 {
3418 3419 int err;
3419 3420 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
3420 3421 err = zfs_unmount_snap(zc->zc_name, NULL);
3421 3422 if (err)
3422 3423 return (err);
3423 3424 }
3424 3425
3425 3426 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
3426 3427 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3427 3428 (void) zvol_remove_minor(zc->zc_name);
3428 3429 return (err);
3429 3430 }
3430 3431
3431 3432 /*
3432 3433 * inputs:
3433 3434 * zc_name name of dataset to rollback (to most recent snapshot)
3434 3435 *
3435 3436 * outputs: none
3436 3437 */
3437 3438 static int
3438 3439 zfs_ioc_rollback(zfs_cmd_t *zc)
3439 3440 {
3440 3441 dsl_dataset_t *ds, *clone;
3441 3442 int error;
3442 3443 zfsvfs_t *zfsvfs;
3443 3444 char *clone_name;
3444 3445
3445 3446 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
3446 3447 if (error)
3447 3448 return (error);
3448 3449
3449 3450 /* must not be a snapshot */
3450 3451 if (dsl_dataset_is_snapshot(ds)) {
3451 3452 dsl_dataset_rele(ds, FTAG);
3452 3453 return (EINVAL);
3453 3454 }
3454 3455
3455 3456 /* must have a most recent snapshot */
3456 3457 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
3457 3458 dsl_dataset_rele(ds, FTAG);
3458 3459 return (EINVAL);
3459 3460 }
3460 3461
3461 3462 /*
3462 3463 * Create clone of most recent snapshot.
3463 3464 */
3464 3465 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
3465 3466 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
3466 3467 if (error)
3467 3468 goto out;
3468 3469
3469 3470 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
3470 3471 if (error)
3471 3472 goto out;
3472 3473
3473 3474 /*
3474 3475 * Do clone swap.
3475 3476 */
3476 3477 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
3477 3478 error = zfs_suspend_fs(zfsvfs);
3478 3479 if (error == 0) {
3479 3480 int resume_err;
3480 3481
3481 3482 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3482 3483 error = dsl_dataset_clone_swap(clone, ds,
3483 3484 B_TRUE);
3484 3485 dsl_dataset_disown(ds, FTAG);
3485 3486 ds = NULL;
3486 3487 } else {
3487 3488 error = EBUSY;
3488 3489 }
3489 3490 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
3490 3491 error = error ? error : resume_err;
3491 3492 }
3492 3493 VFS_RELE(zfsvfs->z_vfs);
3493 3494 } else {
3494 3495 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3495 3496 error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
3496 3497 dsl_dataset_disown(ds, FTAG);
3497 3498 ds = NULL;
3498 3499 } else {
3499 3500 error = EBUSY;
3500 3501 }
3501 3502 }
3502 3503
3503 3504 /*
3504 3505 * Destroy clone (which also closes it).
3505 3506 */
3506 3507 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
3507 3508
3508 3509 out:
3509 3510 strfree(clone_name);
3510 3511 if (ds)
3511 3512 dsl_dataset_rele(ds, FTAG);
3512 3513 return (error);
3513 3514 }
3514 3515
3515 3516 /*
3516 3517 * inputs:
3517 3518 * zc_name old name of dataset
3518 3519 * zc_value new name of dataset
3519 3520 * zc_cookie recursive flag (only valid for snapshots)
3520 3521 *
3521 3522 * outputs: none
3522 3523 */
3523 3524 static int
3524 3525 zfs_ioc_rename(zfs_cmd_t *zc)
3525 3526 {
3526 3527 boolean_t recursive = zc->zc_cookie & 1;
3527 3528
3528 3529 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3529 3530 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3530 3531 strchr(zc->zc_value, '%'))
3531 3532 return (EINVAL);
3532 3533
3533 3534 /*
3534 3535 * Unmount snapshot unless we're doing a recursive rename,
3535 3536 * in which case the dataset code figures out which snapshots
3536 3537 * to unmount.
3537 3538 */
3538 3539 if (!recursive && strchr(zc->zc_name, '@') != NULL &&
3539 3540 zc->zc_objset_type == DMU_OST_ZFS) {
3540 3541 int err = zfs_unmount_snap(zc->zc_name, NULL);
3541 3542 if (err)
3542 3543 return (err);
3543 3544 }
3544 3545 if (zc->zc_objset_type == DMU_OST_ZVOL)
3545 3546 (void) zvol_remove_minor(zc->zc_name);
3546 3547 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
3547 3548 }
3548 3549
3549 3550 static int
3550 3551 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3551 3552 {
3552 3553 const char *propname = nvpair_name(pair);
3553 3554 boolean_t issnap = (strchr(dsname, '@') != NULL);
3554 3555 zfs_prop_t prop = zfs_name_to_prop(propname);
3555 3556 uint64_t intval;
3556 3557 int err;
3557 3558
3558 3559 if (prop == ZPROP_INVAL) {
3559 3560 if (zfs_prop_user(propname)) {
3560 3561 if (err = zfs_secpolicy_write_perms(dsname,
3561 3562 ZFS_DELEG_PERM_USERPROP, cr))
3562 3563 return (err);
3563 3564 return (0);
3564 3565 }
3565 3566
3566 3567 if (!issnap && zfs_prop_userquota(propname)) {
3567 3568 const char *perm = NULL;
3568 3569 const char *uq_prefix =
3569 3570 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3570 3571 const char *gq_prefix =
3571 3572 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3572 3573
3573 3574 if (strncmp(propname, uq_prefix,
3574 3575 strlen(uq_prefix)) == 0) {
3575 3576 perm = ZFS_DELEG_PERM_USERQUOTA;
3576 3577 } else if (strncmp(propname, gq_prefix,
3577 3578 strlen(gq_prefix)) == 0) {
3578 3579 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3579 3580 } else {
3580 3581 /* USERUSED and GROUPUSED are read-only */
3581 3582 return (EINVAL);
3582 3583 }
3583 3584
3584 3585 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3585 3586 return (err);
3586 3587 return (0);
3587 3588 }
3588 3589
3589 3590 return (EINVAL);
3590 3591 }
3591 3592
3592 3593 if (issnap)
3593 3594 return (EINVAL);
3594 3595
3595 3596 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3596 3597 /*
3597 3598 * dsl_prop_get_all_impl() returns properties in this
3598 3599 * format.
3599 3600 */
3600 3601 nvlist_t *attrs;
3601 3602 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3602 3603 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3603 3604 &pair) == 0);
3604 3605 }
3605 3606
3606 3607 /*
3607 3608 * Check that this value is valid for this pool version
3608 3609 */
3609 3610 switch (prop) {
3610 3611 case ZFS_PROP_COMPRESSION:
3611 3612 /*
3612 3613 * If the user specified gzip compression, make sure
3613 3614 * the SPA supports it. We ignore any errors here since
3614 3615 * we'll catch them later.
3615 3616 */
3616 3617 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3617 3618 nvpair_value_uint64(pair, &intval) == 0) {
3618 3619 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3619 3620 intval <= ZIO_COMPRESS_GZIP_9 &&
3620 3621 zfs_earlier_version(dsname,
3621 3622 SPA_VERSION_GZIP_COMPRESSION)) {
3622 3623 return (ENOTSUP);
3623 3624 }
3624 3625
3625 3626 if (intval == ZIO_COMPRESS_ZLE &&
3626 3627 zfs_earlier_version(dsname,
3627 3628 SPA_VERSION_ZLE_COMPRESSION))
3628 3629 return (ENOTSUP);
3629 3630
3630 3631 /*
3631 3632 * If this is a bootable dataset then
3632 3633 * verify that the compression algorithm
3633 3634 * is supported for booting. We must return
3634 3635 * something other than ENOTSUP since it
3635 3636 * implies a downrev pool version.
3636 3637 */
3637 3638 if (zfs_is_bootfs(dsname) &&
3638 3639 !BOOTFS_COMPRESS_VALID(intval)) {
3639 3640 return (ERANGE);
3640 3641 }
3641 3642 }
3642 3643 break;
3643 3644
3644 3645 case ZFS_PROP_COPIES:
3645 3646 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3646 3647 return (ENOTSUP);
3647 3648 break;
3648 3649
3649 3650 case ZFS_PROP_DEDUP:
3650 3651 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3651 3652 return (ENOTSUP);
3652 3653 break;
3653 3654
3654 3655 case ZFS_PROP_SHARESMB:
3655 3656 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3656 3657 return (ENOTSUP);
3657 3658 break;
3658 3659
3659 3660 case ZFS_PROP_ACLINHERIT:
3660 3661 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3661 3662 nvpair_value_uint64(pair, &intval) == 0) {
3662 3663 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3663 3664 zfs_earlier_version(dsname,
3664 3665 SPA_VERSION_PASSTHROUGH_X))
3665 3666 return (ENOTSUP);
3666 3667 }
3667 3668 break;
3668 3669 }
3669 3670
3670 3671 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3671 3672 }
3672 3673
3673 3674 /*
3674 3675 * Removes properties from the given props list that fail permission checks
3675 3676 * needed to clear them and to restore them in case of a receive error. For each
3676 3677 * property, make sure we have both set and inherit permissions.
3677 3678 *
3678 3679 * Returns the first error encountered if any permission checks fail. If the
3679 3680 * caller provides a non-NULL errlist, it also gives the complete list of names
3680 3681 * of all the properties that failed a permission check along with the
3681 3682 * corresponding error numbers. The caller is responsible for freeing the
3682 3683 * returned errlist.
3683 3684 *
3684 3685 * If every property checks out successfully, zero is returned and the list
3685 3686 * pointed at by errlist is NULL.
3686 3687 */
3687 3688 static int
3688 3689 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3689 3690 {
3690 3691 zfs_cmd_t *zc;
3691 3692 nvpair_t *pair, *next_pair;
3692 3693 nvlist_t *errors;
3693 3694 int err, rv = 0;
3694 3695
3695 3696 if (props == NULL)
3696 3697 return (0);
3697 3698
3698 3699 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3699 3700
3700 3701 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3701 3702 (void) strcpy(zc->zc_name, dataset);
3702 3703 pair = nvlist_next_nvpair(props, NULL);
3703 3704 while (pair != NULL) {
3704 3705 next_pair = nvlist_next_nvpair(props, pair);
3705 3706
3706 3707 (void) strcpy(zc->zc_value, nvpair_name(pair));
3707 3708 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3708 3709 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3709 3710 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3710 3711 VERIFY(nvlist_add_int32(errors,
3711 3712 zc->zc_value, err) == 0);
3712 3713 }
3713 3714 pair = next_pair;
3714 3715 }
3715 3716 kmem_free(zc, sizeof (zfs_cmd_t));
3716 3717
3717 3718 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3718 3719 nvlist_free(errors);
3719 3720 errors = NULL;
3720 3721 } else {
3721 3722 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3722 3723 }
3723 3724
3724 3725 if (errlist == NULL)
3725 3726 nvlist_free(errors);
3726 3727 else
3727 3728 *errlist = errors;
3728 3729
3729 3730 return (rv);
3730 3731 }
3731 3732
3732 3733 static boolean_t
3733 3734 propval_equals(nvpair_t *p1, nvpair_t *p2)
3734 3735 {
3735 3736 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3736 3737 /* dsl_prop_get_all_impl() format */
3737 3738 nvlist_t *attrs;
3738 3739 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3739 3740 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3740 3741 &p1) == 0);
3741 3742 }
3742 3743
3743 3744 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3744 3745 nvlist_t *attrs;
3745 3746 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3746 3747 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3747 3748 &p2) == 0);
3748 3749 }
3749 3750
3750 3751 if (nvpair_type(p1) != nvpair_type(p2))
3751 3752 return (B_FALSE);
3752 3753
3753 3754 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3754 3755 char *valstr1, *valstr2;
3755 3756
3756 3757 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3757 3758 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3758 3759 return (strcmp(valstr1, valstr2) == 0);
3759 3760 } else {
3760 3761 uint64_t intval1, intval2;
3761 3762
3762 3763 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3763 3764 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3764 3765 return (intval1 == intval2);
3765 3766 }
3766 3767 }
3767 3768
3768 3769 /*
3769 3770 * Remove properties from props if they are not going to change (as determined
3770 3771 * by comparison with origprops). Remove them from origprops as well, since we
3771 3772 * do not need to clear or restore properties that won't change.
3772 3773 */
3773 3774 static void
3774 3775 props_reduce(nvlist_t *props, nvlist_t *origprops)
3775 3776 {
3776 3777 nvpair_t *pair, *next_pair;
3777 3778
3778 3779 if (origprops == NULL)
3779 3780 return; /* all props need to be received */
3780 3781
3781 3782 pair = nvlist_next_nvpair(props, NULL);
3782 3783 while (pair != NULL) {
3783 3784 const char *propname = nvpair_name(pair);
3784 3785 nvpair_t *match;
3785 3786
3786 3787 next_pair = nvlist_next_nvpair(props, pair);
3787 3788
3788 3789 if ((nvlist_lookup_nvpair(origprops, propname,
3789 3790 &match) != 0) || !propval_equals(pair, match))
3790 3791 goto next; /* need to set received value */
3791 3792
3792 3793 /* don't clear the existing received value */
3793 3794 (void) nvlist_remove_nvpair(origprops, match);
3794 3795 /* don't bother receiving the property */
3795 3796 (void) nvlist_remove_nvpair(props, pair);
3796 3797 next:
3797 3798 pair = next_pair;
3798 3799 }
3799 3800 }
3800 3801
3801 3802 #ifdef DEBUG
3802 3803 static boolean_t zfs_ioc_recv_inject_err;
3803 3804 #endif
3804 3805
3805 3806 /*
3806 3807 * inputs:
3807 3808 * zc_name name of containing filesystem
3808 3809 * zc_nvlist_src{_size} nvlist of properties to apply
3809 3810 * zc_value name of snapshot to create
3810 3811 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3811 3812 * zc_cookie file descriptor to recv from
3812 3813 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3813 3814 * zc_guid force flag
3814 3815 * zc_cleanup_fd cleanup-on-exit file descriptor
3815 3816 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3816 3817 *
3817 3818 * outputs:
3818 3819 * zc_cookie number of bytes read
3819 3820 * zc_nvlist_dst{_size} error for each unapplied received property
3820 3821 * zc_obj zprop_errflags_t
3821 3822 * zc_action_handle handle for this guid/ds mapping
3822 3823 */
3823 3824 static int
3824 3825 zfs_ioc_recv(zfs_cmd_t *zc)
3825 3826 {
3826 3827 file_t *fp;
3827 3828 objset_t *os;
3828 3829 dmu_recv_cookie_t drc;
3829 3830 boolean_t force = (boolean_t)zc->zc_guid;
3830 3831 int fd;
3831 3832 int error = 0;
3832 3833 int props_error = 0;
3833 3834 nvlist_t *errors;
3834 3835 offset_t off;
3835 3836 nvlist_t *props = NULL; /* sent properties */
3836 3837 nvlist_t *origprops = NULL; /* existing properties */
3837 3838 objset_t *origin = NULL;
3838 3839 char *tosnap;
3839 3840 char tofs[ZFS_MAXNAMELEN];
3840 3841 boolean_t first_recvd_props = B_FALSE;
3841 3842
3842 3843 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3843 3844 strchr(zc->zc_value, '@') == NULL ||
3844 3845 strchr(zc->zc_value, '%'))
3845 3846 return (EINVAL);
3846 3847
3847 3848 (void) strcpy(tofs, zc->zc_value);
3848 3849 tosnap = strchr(tofs, '@');
3849 3850 *tosnap++ = '\0';
3850 3851
3851 3852 if (zc->zc_nvlist_src != NULL &&
3852 3853 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3853 3854 zc->zc_iflags, &props)) != 0)
3854 3855 return (error);
3855 3856
3856 3857 fd = zc->zc_cookie;
3857 3858 fp = getf(fd);
3858 3859 if (fp == NULL) {
3859 3860 nvlist_free(props);
3860 3861 return (EBADF);
3861 3862 }
3862 3863
3863 3864 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3864 3865
3865 3866 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
3866 3867 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
3867 3868 !dsl_prop_get_hasrecvd(os)) {
3868 3869 first_recvd_props = B_TRUE;
3869 3870 }
3870 3871
3871 3872 /*
3872 3873 * If new received properties are supplied, they are to
3873 3874 * completely replace the existing received properties, so stash
3874 3875 * away the existing ones.
3875 3876 */
3876 3877 if (dsl_prop_get_received(os, &origprops) == 0) {
3877 3878 nvlist_t *errlist = NULL;
3878 3879 /*
3879 3880 * Don't bother writing a property if its value won't
3880 3881 * change (and avoid the unnecessary security checks).
3881 3882 *
3882 3883 * The first receive after SPA_VERSION_RECVD_PROPS is a
3883 3884 * special case where we blow away all local properties
3884 3885 * regardless.
3885 3886 */
3886 3887 if (!first_recvd_props)
3887 3888 props_reduce(props, origprops);
3888 3889 if (zfs_check_clearable(tofs, origprops,
3889 3890 &errlist) != 0)
3890 3891 (void) nvlist_merge(errors, errlist, 0);
3891 3892 nvlist_free(errlist);
3892 3893 }
3893 3894
3894 3895 dmu_objset_rele(os, FTAG);
3895 3896 }
3896 3897
3897 3898 if (zc->zc_string[0]) {
3898 3899 error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
3899 3900 if (error)
3900 3901 goto out;
3901 3902 }
3902 3903
3903 3904 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
3904 3905 &zc->zc_begin_record, force, origin, &drc);
3905 3906 if (origin)
3906 3907 dmu_objset_rele(origin, FTAG);
3907 3908 if (error)
3908 3909 goto out;
3909 3910
3910 3911 /*
3911 3912 * Set properties before we receive the stream so that they are applied
3912 3913 * to the new data. Note that we must call dmu_recv_stream() if
3913 3914 * dmu_recv_begin() succeeds.
3914 3915 */
3915 3916 if (props) {
3916 3917 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
3917 3918 if (drc.drc_newfs) {
3918 3919 if (spa_version(os->os_spa) >=
3919 3920 SPA_VERSION_RECVD_PROPS)
3920 3921 first_recvd_props = B_TRUE;
3921 3922 } else if (origprops != NULL) {
3922 3923 if (clear_received_props(os, tofs, origprops,
3923 3924 first_recvd_props ? NULL : props) != 0)
3924 3925 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3925 3926 } else {
3926 3927 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3927 3928 }
3928 3929 dsl_prop_set_hasrecvd(os);
3929 3930 } else if (!drc.drc_newfs) {
3930 3931 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3931 3932 }
3932 3933
3933 3934 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
3934 3935 props, errors);
3935 3936 }
3936 3937
3937 3938 if (zc->zc_nvlist_dst_size != 0 &&
3938 3939 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
3939 3940 put_nvlist(zc, errors) != 0)) {
3940 3941 /*
3941 3942 * Caller made zc->zc_nvlist_dst less than the minimum expected
3942 3943 * size or supplied an invalid address.
3943 3944 */
3944 3945 props_error = EINVAL;
3945 3946 }
3946 3947
3947 3948 off = fp->f_offset;
3948 3949 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
3949 3950 &zc->zc_action_handle);
3950 3951
3951 3952 if (error == 0) {
3952 3953 zfsvfs_t *zfsvfs = NULL;
3953 3954
3954 3955 if (getzfsvfs(tofs, &zfsvfs) == 0) {
3955 3956 /* online recv */
3956 3957 int end_err;
3957 3958
3958 3959 error = zfs_suspend_fs(zfsvfs);
3959 3960 /*
3960 3961 * If the suspend fails, then the recv_end will
3961 3962 * likely also fail, and clean up after itself.
3962 3963 */
3963 3964 end_err = dmu_recv_end(&drc);
3964 3965 if (error == 0)
3965 3966 error = zfs_resume_fs(zfsvfs, tofs);
3966 3967 error = error ? error : end_err;
3967 3968 VFS_RELE(zfsvfs->z_vfs);
3968 3969 } else {
3969 3970 error = dmu_recv_end(&drc);
3970 3971 }
3971 3972 }
3972 3973
3973 3974 zc->zc_cookie = off - fp->f_offset;
3974 3975 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
3975 3976 fp->f_offset = off;
3976 3977
3977 3978 #ifdef DEBUG
3978 3979 if (zfs_ioc_recv_inject_err) {
3979 3980 zfs_ioc_recv_inject_err = B_FALSE;
3980 3981 error = 1;
3981 3982 }
3982 3983 #endif
3983 3984 /*
3984 3985 * On error, restore the original props.
3985 3986 */
3986 3987 if (error && props) {
3987 3988 if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
3988 3989 if (clear_received_props(os, tofs, props, NULL) != 0) {
3989 3990 /*
3990 3991 * We failed to clear the received properties.
3991 3992 * Since we may have left a $recvd value on the
3992 3993 * system, we can't clear the $hasrecvd flag.
3993 3994 */
3994 3995 zc->zc_obj |= ZPROP_ERR_NORESTORE;
3995 3996 } else if (first_recvd_props) {
3996 3997 dsl_prop_unset_hasrecvd(os);
3997 3998 }
3998 3999 dmu_objset_rele(os, FTAG);
3999 4000 } else if (!drc.drc_newfs) {
4000 4001 /* We failed to clear the received properties. */
4001 4002 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4002 4003 }
4003 4004
4004 4005 if (origprops == NULL && !drc.drc_newfs) {
4005 4006 /* We failed to stash the original properties. */
4006 4007 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4007 4008 }
4008 4009
4009 4010 /*
4010 4011 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4011 4012 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4012 4013 * explictly if we're restoring local properties cleared in the
4013 4014 * first new-style receive.
4014 4015 */
4015 4016 if (origprops != NULL &&
4016 4017 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4017 4018 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4018 4019 origprops, NULL) != 0) {
4019 4020 /*
4020 4021 * We stashed the original properties but failed to
4021 4022 * restore them.
4022 4023 */
4023 4024 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4024 4025 }
4025 4026 }
4026 4027 out:
4027 4028 nvlist_free(props);
4028 4029 nvlist_free(origprops);
4029 4030 nvlist_free(errors);
4030 4031 releasef(fd);
4031 4032
4032 4033 if (error == 0)
4033 4034 error = props_error;
4034 4035
4035 4036 return (error);
4036 4037 }
4037 4038
4038 4039 /*
4039 4040 * inputs:
4040 4041 * zc_name name of snapshot to send
4041 4042 * zc_cookie file descriptor to send stream to
4042 4043 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4043 4044 * zc_sendobj objsetid of snapshot to send
4044 4045 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4045 4046 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4046 4047 * output size in zc_objset_type.
4047 4048 *
4048 4049 * outputs: none
4049 4050 */
4050 4051 static int
4051 4052 zfs_ioc_send(zfs_cmd_t *zc)
4052 4053 {
4053 4054 objset_t *fromsnap = NULL;
4054 4055 objset_t *tosnap;
4055 4056 int error;
4056 4057 offset_t off;
4057 4058 dsl_dataset_t *ds;
4058 4059 dsl_dataset_t *dsfrom = NULL;
4059 4060 spa_t *spa;
4060 4061 dsl_pool_t *dp;
4061 4062 boolean_t estimate = (zc->zc_guid != 0);
4062 4063
4063 4064 error = spa_open(zc->zc_name, &spa, FTAG);
4064 4065 if (error)
4065 4066 return (error);
4066 4067
4067 4068 dp = spa_get_dsl(spa);
4068 4069 rw_enter(&dp->dp_config_rwlock, RW_READER);
4069 4070 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
4070 4071 rw_exit(&dp->dp_config_rwlock);
4071 4072 spa_close(spa, FTAG);
4072 4073 if (error)
4073 4074 return (error);
4074 4075
4075 4076 error = dmu_objset_from_ds(ds, &tosnap);
4076 4077 if (error) {
4077 4078 dsl_dataset_rele(ds, FTAG);
4078 4079 return (error);
4079 4080 }
4080 4081
4081 4082 if (zc->zc_fromobj != 0) {
4082 4083 rw_enter(&dp->dp_config_rwlock, RW_READER);
4083 4084 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
4084 4085 rw_exit(&dp->dp_config_rwlock);
4085 4086 if (error) {
4086 4087 dsl_dataset_rele(ds, FTAG);
4087 4088 return (error);
4088 4089 }
4089 4090 error = dmu_objset_from_ds(dsfrom, &fromsnap);
4090 4091 if (error) {
4091 4092 dsl_dataset_rele(dsfrom, FTAG);
4092 4093 dsl_dataset_rele(ds, FTAG);
4093 4094 return (error);
4094 4095 }
4095 4096 }
4096 4097
4097 4098 if (zc->zc_obj) {
4098 4099 dsl_pool_t *dp = ds->ds_dir->dd_pool;
4099 4100
4100 4101 if (fromsnap != NULL) {
4101 4102 dsl_dataset_rele(dsfrom, FTAG);
4102 4103 dsl_dataset_rele(ds, FTAG);
4103 4104 return (EINVAL);
4104 4105 }
4105 4106
4106 4107 if (dsl_dir_is_clone(ds->ds_dir)) {
4107 4108 rw_enter(&dp->dp_config_rwlock, RW_READER);
4108 4109 error = dsl_dataset_hold_obj(dp,
4109 4110 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &dsfrom);
4110 4111 rw_exit(&dp->dp_config_rwlock);
4111 4112 if (error) {
4112 4113 dsl_dataset_rele(ds, FTAG);
4113 4114 return (error);
4114 4115 }
4115 4116 error = dmu_objset_from_ds(dsfrom, &fromsnap);
4116 4117 if (error) {
4117 4118 dsl_dataset_rele(dsfrom, FTAG);
4118 4119 dsl_dataset_rele(ds, FTAG);
4119 4120 return (error);
4120 4121 }
4121 4122 }
4122 4123 }
4123 4124
4124 4125 if (estimate) {
4125 4126 error = dmu_send_estimate(tosnap, fromsnap,
4126 4127 &zc->zc_objset_type);
4127 4128 } else {
4128 4129 file_t *fp = getf(zc->zc_cookie);
4129 4130 if (fp == NULL) {
4130 4131 dsl_dataset_rele(ds, FTAG);
4131 4132 if (dsfrom)
4132 4133 dsl_dataset_rele(dsfrom, FTAG);
4133 4134 return (EBADF);
4134 4135 }
4135 4136
4136 4137 off = fp->f_offset;
4137 4138 error = dmu_send(tosnap, fromsnap,
4138 4139 zc->zc_cookie, fp->f_vnode, &off);
4139 4140
4140 4141 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4141 4142 fp->f_offset = off;
4142 4143 releasef(zc->zc_cookie);
4143 4144 }
4144 4145 if (dsfrom)
4145 4146 dsl_dataset_rele(dsfrom, FTAG);
4146 4147 dsl_dataset_rele(ds, FTAG);
4147 4148 return (error);
4148 4149 }
4149 4150
4150 4151 /*
4151 4152 * inputs:
4152 4153 * zc_name name of snapshot on which to report progress
4153 4154 * zc_cookie file descriptor of send stream
4154 4155 *
4155 4156 * outputs:
4156 4157 * zc_cookie number of bytes written in send stream thus far
4157 4158 */
4158 4159 static int
4159 4160 zfs_ioc_send_progress(zfs_cmd_t *zc)
4160 4161 {
4161 4162 dsl_dataset_t *ds;
4162 4163 dmu_sendarg_t *dsp = NULL;
4163 4164 int error;
4164 4165
4165 4166 if ((error = dsl_dataset_hold(zc->zc_name, FTAG, &ds)) != 0)
4166 4167 return (error);
4167 4168
4168 4169 mutex_enter(&ds->ds_sendstream_lock);
4169 4170
4170 4171 /*
4171 4172 * Iterate over all the send streams currently active on this dataset.
4172 4173 * If there's one which matches the specified file descriptor _and_ the
4173 4174 * stream was started by the current process, return the progress of
4174 4175 * that stream.
4175 4176 */
4176 4177 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4177 4178 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4178 4179 if (dsp->dsa_outfd == zc->zc_cookie &&
4179 4180 dsp->dsa_proc == curproc)
4180 4181 break;
4181 4182 }
4182 4183
4183 4184 if (dsp != NULL)
4184 4185 zc->zc_cookie = *(dsp->dsa_off);
4185 4186 else
4186 4187 error = ENOENT;
4187 4188
4188 4189 mutex_exit(&ds->ds_sendstream_lock);
4189 4190 dsl_dataset_rele(ds, FTAG);
4190 4191 return (error);
4191 4192 }
4192 4193
4193 4194 static int
4194 4195 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4195 4196 {
4196 4197 int id, error;
4197 4198
4198 4199 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4199 4200 &zc->zc_inject_record);
4200 4201
4201 4202 if (error == 0)
4202 4203 zc->zc_guid = (uint64_t)id;
4203 4204
4204 4205 return (error);
4205 4206 }
4206 4207
4207 4208 static int
4208 4209 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4209 4210 {
4210 4211 return (zio_clear_fault((int)zc->zc_guid));
4211 4212 }
4212 4213
4213 4214 static int
4214 4215 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4215 4216 {
4216 4217 int id = (int)zc->zc_guid;
4217 4218 int error;
4218 4219
4219 4220 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4220 4221 &zc->zc_inject_record);
4221 4222
4222 4223 zc->zc_guid = id;
4223 4224
4224 4225 return (error);
4225 4226 }
4226 4227
4227 4228 static int
4228 4229 zfs_ioc_error_log(zfs_cmd_t *zc)
4229 4230 {
4230 4231 spa_t *spa;
4231 4232 int error;
4232 4233 size_t count = (size_t)zc->zc_nvlist_dst_size;
4233 4234
4234 4235 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4235 4236 return (error);
4236 4237
4237 4238 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4238 4239 &count);
4239 4240 if (error == 0)
4240 4241 zc->zc_nvlist_dst_size = count;
4241 4242 else
4242 4243 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4243 4244
4244 4245 spa_close(spa, FTAG);
4245 4246
4246 4247 return (error);
4247 4248 }
4248 4249
4249 4250 static int
4250 4251 zfs_ioc_clear(zfs_cmd_t *zc)
4251 4252 {
4252 4253 spa_t *spa;
4253 4254 vdev_t *vd;
4254 4255 int error;
4255 4256
4256 4257 /*
4257 4258 * On zpool clear we also fix up missing slogs
4258 4259 */
4259 4260 mutex_enter(&spa_namespace_lock);
4260 4261 spa = spa_lookup(zc->zc_name);
4261 4262 if (spa == NULL) {
4262 4263 mutex_exit(&spa_namespace_lock);
4263 4264 return (EIO);
4264 4265 }
4265 4266 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4266 4267 /* we need to let spa_open/spa_load clear the chains */
4267 4268 spa_set_log_state(spa, SPA_LOG_CLEAR);
4268 4269 }
4269 4270 spa->spa_last_open_failed = 0;
4270 4271 mutex_exit(&spa_namespace_lock);
4271 4272
4272 4273 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4273 4274 error = spa_open(zc->zc_name, &spa, FTAG);
4274 4275 } else {
4275 4276 nvlist_t *policy;
4276 4277 nvlist_t *config = NULL;
4277 4278
4278 4279 if (zc->zc_nvlist_src == NULL)
4279 4280 return (EINVAL);
4280 4281
4281 4282 if ((error = get_nvlist(zc->zc_nvlist_src,
4282 4283 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4283 4284 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4284 4285 policy, &config);
4285 4286 if (config != NULL) {
4286 4287 int err;
4287 4288
4288 4289 if ((err = put_nvlist(zc, config)) != 0)
4289 4290 error = err;
4290 4291 nvlist_free(config);
4291 4292 }
4292 4293 nvlist_free(policy);
4293 4294 }
4294 4295 }
4295 4296
4296 4297 if (error)
4297 4298 return (error);
4298 4299
4299 4300 spa_vdev_state_enter(spa, SCL_NONE);
4300 4301
4301 4302 if (zc->zc_guid == 0) {
4302 4303 vd = NULL;
4303 4304 } else {
4304 4305 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4305 4306 if (vd == NULL) {
4306 4307 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4307 4308 spa_close(spa, FTAG);
4308 4309 return (ENODEV);
4309 4310 }
4310 4311 }
4311 4312
4312 4313 vdev_clear(spa, vd);
4313 4314
4314 4315 (void) spa_vdev_state_exit(spa, NULL, 0);
4315 4316
4316 4317 /*
4317 4318 * Resume any suspended I/Os.
4318 4319 */
4319 4320 if (zio_resume(spa) != 0)
4320 4321 error = EIO;
4321 4322
4322 4323 spa_close(spa, FTAG);
4323 4324
4324 4325 return (error);
4325 4326 }
4326 4327
4327 4328 static int
4328 4329 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4329 4330 {
4330 4331 spa_t *spa;
4331 4332 int error;
4332 4333
4333 4334 error = spa_open(zc->zc_name, &spa, FTAG);
4334 4335 if (error)
4335 4336 return (error);
4336 4337
4337 4338 spa_vdev_state_enter(spa, SCL_NONE);
4338 4339
4339 4340 /*
4340 4341 * If a resilver is already in progress then set the
4341 4342 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4342 4343 * the scan as a side effect of the reopen. Otherwise, let
4343 4344 * vdev_open() decided if a resilver is required.
4344 4345 */
4345 4346 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4346 4347 vdev_reopen(spa->spa_root_vdev);
4347 4348 spa->spa_scrub_reopen = B_FALSE;
4348 4349
4349 4350 (void) spa_vdev_state_exit(spa, NULL, 0);
4350 4351 spa_close(spa, FTAG);
4351 4352 return (0);
4352 4353 }
4353 4354 /*
4354 4355 * inputs:
4355 4356 * zc_name name of filesystem
4356 4357 * zc_value name of origin snapshot
4357 4358 *
4358 4359 * outputs:
4359 4360 * zc_string name of conflicting snapshot, if there is one
4360 4361 */
4361 4362 static int
4362 4363 zfs_ioc_promote(zfs_cmd_t *zc)
4363 4364 {
4364 4365 char *cp;
4365 4366
4366 4367 /*
4367 4368 * We don't need to unmount *all* the origin fs's snapshots, but
4368 4369 * it's easier.
4369 4370 */
4370 4371 cp = strchr(zc->zc_value, '@');
4371 4372 if (cp)
4372 4373 *cp = '\0';
4373 4374 (void) dmu_objset_find(zc->zc_value,
4374 4375 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
4375 4376 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4376 4377 }
4377 4378
4378 4379 /*
4379 4380 * Retrieve a single {user|group}{used|quota}@... property.
4380 4381 *
4381 4382 * inputs:
4382 4383 * zc_name name of filesystem
4383 4384 * zc_objset_type zfs_userquota_prop_t
4384 4385 * zc_value domain name (eg. "S-1-234-567-89")
4385 4386 * zc_guid RID/UID/GID
4386 4387 *
4387 4388 * outputs:
4388 4389 * zc_cookie property value
4389 4390 */
4390 4391 static int
4391 4392 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4392 4393 {
4393 4394 zfsvfs_t *zfsvfs;
4394 4395 int error;
4395 4396
4396 4397 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4397 4398 return (EINVAL);
4398 4399
4399 4400 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4400 4401 if (error)
4401 4402 return (error);
4402 4403
4403 4404 error = zfs_userspace_one(zfsvfs,
4404 4405 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4405 4406 zfsvfs_rele(zfsvfs, FTAG);
4406 4407
4407 4408 return (error);
4408 4409 }
4409 4410
4410 4411 /*
4411 4412 * inputs:
4412 4413 * zc_name name of filesystem
4413 4414 * zc_cookie zap cursor
4414 4415 * zc_objset_type zfs_userquota_prop_t
4415 4416 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4416 4417 *
4417 4418 * outputs:
4418 4419 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4419 4420 * zc_cookie zap cursor
4420 4421 */
4421 4422 static int
4422 4423 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4423 4424 {
4424 4425 zfsvfs_t *zfsvfs;
4425 4426 int bufsize = zc->zc_nvlist_dst_size;
4426 4427
4427 4428 if (bufsize <= 0)
4428 4429 return (ENOMEM);
4429 4430
4430 4431 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4431 4432 if (error)
4432 4433 return (error);
4433 4434
4434 4435 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4435 4436
4436 4437 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4437 4438 buf, &zc->zc_nvlist_dst_size);
4438 4439
4439 4440 if (error == 0) {
4440 4441 error = xcopyout(buf,
4441 4442 (void *)(uintptr_t)zc->zc_nvlist_dst,
4442 4443 zc->zc_nvlist_dst_size);
4443 4444 }
4444 4445 kmem_free(buf, bufsize);
4445 4446 zfsvfs_rele(zfsvfs, FTAG);
4446 4447
4447 4448 return (error);
4448 4449 }
4449 4450
4450 4451 /*
4451 4452 * inputs:
4452 4453 * zc_name name of filesystem
4453 4454 *
4454 4455 * outputs:
4455 4456 * none
4456 4457 */
4457 4458 static int
4458 4459 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4459 4460 {
4460 4461 objset_t *os;
4461 4462 int error = 0;
4462 4463 zfsvfs_t *zfsvfs;
4463 4464
4464 4465 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4465 4466 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4466 4467 /*
4467 4468 * If userused is not enabled, it may be because the
4468 4469 * objset needs to be closed & reopened (to grow the
4469 4470 * objset_phys_t). Suspend/resume the fs will do that.
4470 4471 */
4471 4472 error = zfs_suspend_fs(zfsvfs);
4472 4473 if (error == 0)
4473 4474 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4474 4475 }
4475 4476 if (error == 0)
4476 4477 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4477 4478 VFS_RELE(zfsvfs->z_vfs);
4478 4479 } else {
4479 4480 /* XXX kind of reading contents without owning */
4480 4481 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4481 4482 if (error)
4482 4483 return (error);
4483 4484
4484 4485 error = dmu_objset_userspace_upgrade(os);
4485 4486 dmu_objset_rele(os, FTAG);
4486 4487 }
4487 4488
4488 4489 return (error);
4489 4490 }
4490 4491
4491 4492 /*
4492 4493 * We don't want to have a hard dependency
4493 4494 * against some special symbols in sharefs
4494 4495 * nfs, and smbsrv. Determine them if needed when
4495 4496 * the first file system is shared.
4496 4497 * Neither sharefs, nfs or smbsrv are unloadable modules.
4497 4498 */
4498 4499 int (*znfsexport_fs)(void *arg);
4499 4500 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4500 4501 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4501 4502
4502 4503 int zfs_nfsshare_inited;
4503 4504 int zfs_smbshare_inited;
4504 4505
4505 4506 ddi_modhandle_t nfs_mod;
4506 4507 ddi_modhandle_t sharefs_mod;
4507 4508 ddi_modhandle_t smbsrv_mod;
4508 4509 kmutex_t zfs_share_lock;
4509 4510
4510 4511 static int
4511 4512 zfs_init_sharefs()
4512 4513 {
4513 4514 int error;
4514 4515
4515 4516 ASSERT(MUTEX_HELD(&zfs_share_lock));
4516 4517 /* Both NFS and SMB shares also require sharetab support. */
4517 4518 if (sharefs_mod == NULL && ((sharefs_mod =
4518 4519 ddi_modopen("fs/sharefs",
4519 4520 KRTLD_MODE_FIRST, &error)) == NULL)) {
4520 4521 return (ENOSYS);
4521 4522 }
4522 4523 if (zshare_fs == NULL && ((zshare_fs =
4523 4524 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4524 4525 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4525 4526 return (ENOSYS);
4526 4527 }
4527 4528 return (0);
4528 4529 }
4529 4530
4530 4531 static int
4531 4532 zfs_ioc_share(zfs_cmd_t *zc)
4532 4533 {
4533 4534 int error;
4534 4535 int opcode;
4535 4536
4536 4537 switch (zc->zc_share.z_sharetype) {
4537 4538 case ZFS_SHARE_NFS:
4538 4539 case ZFS_UNSHARE_NFS:
4539 4540 if (zfs_nfsshare_inited == 0) {
4540 4541 mutex_enter(&zfs_share_lock);
4541 4542 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4542 4543 KRTLD_MODE_FIRST, &error)) == NULL)) {
4543 4544 mutex_exit(&zfs_share_lock);
4544 4545 return (ENOSYS);
4545 4546 }
4546 4547 if (znfsexport_fs == NULL &&
4547 4548 ((znfsexport_fs = (int (*)(void *))
4548 4549 ddi_modsym(nfs_mod,
4549 4550 "nfs_export", &error)) == NULL)) {
4550 4551 mutex_exit(&zfs_share_lock);
4551 4552 return (ENOSYS);
4552 4553 }
4553 4554 error = zfs_init_sharefs();
4554 4555 if (error) {
4555 4556 mutex_exit(&zfs_share_lock);
4556 4557 return (ENOSYS);
4557 4558 }
4558 4559 zfs_nfsshare_inited = 1;
4559 4560 mutex_exit(&zfs_share_lock);
4560 4561 }
4561 4562 break;
4562 4563 case ZFS_SHARE_SMB:
4563 4564 case ZFS_UNSHARE_SMB:
4564 4565 if (zfs_smbshare_inited == 0) {
4565 4566 mutex_enter(&zfs_share_lock);
4566 4567 if (smbsrv_mod == NULL && ((smbsrv_mod =
4567 4568 ddi_modopen("drv/smbsrv",
4568 4569 KRTLD_MODE_FIRST, &error)) == NULL)) {
4569 4570 mutex_exit(&zfs_share_lock);
4570 4571 return (ENOSYS);
4571 4572 }
4572 4573 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4573 4574 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4574 4575 "smb_server_share", &error)) == NULL)) {
4575 4576 mutex_exit(&zfs_share_lock);
4576 4577 return (ENOSYS);
4577 4578 }
4578 4579 error = zfs_init_sharefs();
4579 4580 if (error) {
4580 4581 mutex_exit(&zfs_share_lock);
4581 4582 return (ENOSYS);
4582 4583 }
4583 4584 zfs_smbshare_inited = 1;
4584 4585 mutex_exit(&zfs_share_lock);
4585 4586 }
4586 4587 break;
4587 4588 default:
4588 4589 return (EINVAL);
4589 4590 }
4590 4591
4591 4592 switch (zc->zc_share.z_sharetype) {
4592 4593 case ZFS_SHARE_NFS:
4593 4594 case ZFS_UNSHARE_NFS:
4594 4595 if (error =
4595 4596 znfsexport_fs((void *)
4596 4597 (uintptr_t)zc->zc_share.z_exportdata))
4597 4598 return (error);
4598 4599 break;
4599 4600 case ZFS_SHARE_SMB:
4600 4601 case ZFS_UNSHARE_SMB:
4601 4602 if (error = zsmbexport_fs((void *)
4602 4603 (uintptr_t)zc->zc_share.z_exportdata,
4603 4604 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4604 4605 B_TRUE: B_FALSE)) {
4605 4606 return (error);
4606 4607 }
4607 4608 break;
4608 4609 }
4609 4610
4610 4611 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4611 4612 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4612 4613 SHAREFS_ADD : SHAREFS_REMOVE;
4613 4614
4614 4615 /*
4615 4616 * Add or remove share from sharetab
4616 4617 */
4617 4618 error = zshare_fs(opcode,
4618 4619 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4619 4620 zc->zc_share.z_sharemax);
4620 4621
4621 4622 return (error);
4622 4623
4623 4624 }
4624 4625
4625 4626 ace_t full_access[] = {
4626 4627 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4627 4628 };
4628 4629
4629 4630 /*
4630 4631 * inputs:
4631 4632 * zc_name name of containing filesystem
4632 4633 * zc_obj object # beyond which we want next in-use object #
4633 4634 *
4634 4635 * outputs:
4635 4636 * zc_obj next in-use object #
4636 4637 */
4637 4638 static int
4638 4639 zfs_ioc_next_obj(zfs_cmd_t *zc)
4639 4640 {
4640 4641 objset_t *os = NULL;
4641 4642 int error;
4642 4643
4643 4644 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4644 4645 if (error)
4645 4646 return (error);
4646 4647
4647 4648 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4648 4649 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4649 4650
4650 4651 dmu_objset_rele(os, FTAG);
4651 4652 return (error);
4652 4653 }
4653 4654
4654 4655 /*
4655 4656 * inputs:
4656 4657 * zc_name name of filesystem
4657 4658 * zc_value prefix name for snapshot
4658 4659 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4659 4660 *
4660 4661 * outputs:
4661 4662 * zc_value short name of new snapshot
4662 4663 */
4663 4664 static int
4664 4665 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4665 4666 {
4666 4667 char *snap_name;
4667 4668 int error;
4668 4669
4669 4670 snap_name = kmem_asprintf("%s@%s-%016llx", zc->zc_name, zc->zc_value,
4670 4671 (u_longlong_t)ddi_get_lbolt64());
4671 4672
4672 4673 if (strlen(snap_name) >= MAXPATHLEN) {
4673 4674 strfree(snap_name);
4674 4675 return (E2BIG);
4675 4676 }
4676 4677
4677 4678 error = dmu_objset_snapshot_tmp(snap_name, "%temp", zc->zc_cleanup_fd);
4678 4679 if (error != 0) {
4679 4680 strfree(snap_name);
4680 4681 return (error);
4681 4682 }
4682 4683
4683 4684 (void) strcpy(zc->zc_value, strchr(snap_name, '@') + 1);
4684 4685 strfree(snap_name);
4685 4686 return (0);
4686 4687 }
4687 4688
4688 4689 /*
4689 4690 * inputs:
4690 4691 * zc_name name of "to" snapshot
4691 4692 * zc_value name of "from" snapshot
4692 4693 * zc_cookie file descriptor to write diff data on
4693 4694 *
4694 4695 * outputs:
4695 4696 * dmu_diff_record_t's to the file descriptor
4696 4697 */
4697 4698 static int
4698 4699 zfs_ioc_diff(zfs_cmd_t *zc)
4699 4700 {
4700 4701 objset_t *fromsnap;
4701 4702 objset_t *tosnap;
4702 4703 file_t *fp;
4703 4704 offset_t off;
4704 4705 int error;
4705 4706
4706 4707 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
4707 4708 if (error)
4708 4709 return (error);
4709 4710
4710 4711 error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
4711 4712 if (error) {
4712 4713 dmu_objset_rele(tosnap, FTAG);
4713 4714 return (error);
4714 4715 }
4715 4716
4716 4717 fp = getf(zc->zc_cookie);
4717 4718 if (fp == NULL) {
4718 4719 dmu_objset_rele(fromsnap, FTAG);
4719 4720 dmu_objset_rele(tosnap, FTAG);
4720 4721 return (EBADF);
4721 4722 }
4722 4723
4723 4724 off = fp->f_offset;
4724 4725
4725 4726 error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
4726 4727
4727 4728 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4728 4729 fp->f_offset = off;
4729 4730 releasef(zc->zc_cookie);
4730 4731
4731 4732 dmu_objset_rele(fromsnap, FTAG);
4732 4733 dmu_objset_rele(tosnap, FTAG);
4733 4734 return (error);
4734 4735 }
4735 4736
4736 4737 /*
4737 4738 * Remove all ACL files in shares dir
4738 4739 */
4739 4740 static int
4740 4741 zfs_smb_acl_purge(znode_t *dzp)
4741 4742 {
4742 4743 zap_cursor_t zc;
4743 4744 zap_attribute_t zap;
4744 4745 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4745 4746 int error;
4746 4747
4747 4748 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4748 4749 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4749 4750 zap_cursor_advance(&zc)) {
4750 4751 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4751 4752 NULL, 0)) != 0)
4752 4753 break;
4753 4754 }
4754 4755 zap_cursor_fini(&zc);
4755 4756 return (error);
4756 4757 }
4757 4758
4758 4759 static int
4759 4760 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4760 4761 {
4761 4762 vnode_t *vp;
4762 4763 znode_t *dzp;
4763 4764 vnode_t *resourcevp = NULL;
4764 4765 znode_t *sharedir;
4765 4766 zfsvfs_t *zfsvfs;
4766 4767 nvlist_t *nvlist;
4767 4768 char *src, *target;
4768 4769 vattr_t vattr;
4769 4770 vsecattr_t vsec;
4770 4771 int error = 0;
4771 4772
4772 4773 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4773 4774 NO_FOLLOW, NULL, &vp)) != 0)
4774 4775 return (error);
4775 4776
4776 4777 /* Now make sure mntpnt and dataset are ZFS */
4777 4778
4778 4779 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4779 4780 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4780 4781 zc->zc_name) != 0)) {
4781 4782 VN_RELE(vp);
4782 4783 return (EINVAL);
4783 4784 }
4784 4785
4785 4786 dzp = VTOZ(vp);
4786 4787 zfsvfs = dzp->z_zfsvfs;
4787 4788 ZFS_ENTER(zfsvfs);
4788 4789
4789 4790 /*
4790 4791 * Create share dir if its missing.
4791 4792 */
4792 4793 mutex_enter(&zfsvfs->z_lock);
4793 4794 if (zfsvfs->z_shares_dir == 0) {
4794 4795 dmu_tx_t *tx;
4795 4796
4796 4797 tx = dmu_tx_create(zfsvfs->z_os);
4797 4798 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4798 4799 ZFS_SHARES_DIR);
4799 4800 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4800 4801 error = dmu_tx_assign(tx, TXG_WAIT);
4801 4802 if (error) {
4802 4803 dmu_tx_abort(tx);
4803 4804 } else {
4804 4805 error = zfs_create_share_dir(zfsvfs, tx);
4805 4806 dmu_tx_commit(tx);
4806 4807 }
4807 4808 if (error) {
4808 4809 mutex_exit(&zfsvfs->z_lock);
4809 4810 VN_RELE(vp);
4810 4811 ZFS_EXIT(zfsvfs);
4811 4812 return (error);
4812 4813 }
4813 4814 }
4814 4815 mutex_exit(&zfsvfs->z_lock);
4815 4816
4816 4817 ASSERT(zfsvfs->z_shares_dir);
4817 4818 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4818 4819 VN_RELE(vp);
4819 4820 ZFS_EXIT(zfsvfs);
4820 4821 return (error);
4821 4822 }
4822 4823
4823 4824 switch (zc->zc_cookie) {
4824 4825 case ZFS_SMB_ACL_ADD:
4825 4826 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4826 4827 vattr.va_type = VREG;
4827 4828 vattr.va_mode = S_IFREG|0777;
4828 4829 vattr.va_uid = 0;
4829 4830 vattr.va_gid = 0;
4830 4831
4831 4832 vsec.vsa_mask = VSA_ACE;
4832 4833 vsec.vsa_aclentp = &full_access;
4833 4834 vsec.vsa_aclentsz = sizeof (full_access);
4834 4835 vsec.vsa_aclcnt = 1;
4835 4836
4836 4837 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4837 4838 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4838 4839 if (resourcevp)
4839 4840 VN_RELE(resourcevp);
4840 4841 break;
4841 4842
4842 4843 case ZFS_SMB_ACL_REMOVE:
4843 4844 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4844 4845 NULL, 0);
4845 4846 break;
4846 4847
4847 4848 case ZFS_SMB_ACL_RENAME:
4848 4849 if ((error = get_nvlist(zc->zc_nvlist_src,
4849 4850 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4850 4851 VN_RELE(vp);
4851 4852 ZFS_EXIT(zfsvfs);
4852 4853 return (error);
4853 4854 }
4854 4855 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4855 4856 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4856 4857 &target)) {
4857 4858 VN_RELE(vp);
4858 4859 VN_RELE(ZTOV(sharedir));
4859 4860 ZFS_EXIT(zfsvfs);
4860 4861 nvlist_free(nvlist);
4861 4862 return (error);
4862 4863 }
4863 4864 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4864 4865 kcred, NULL, 0);
4865 4866 nvlist_free(nvlist);
4866 4867 break;
4867 4868
4868 4869 case ZFS_SMB_ACL_PURGE:
4869 4870 error = zfs_smb_acl_purge(sharedir);
4870 4871 break;
4871 4872
4872 4873 default:
4873 4874 error = EINVAL;
4874 4875 break;
4875 4876 }
4876 4877
4877 4878 VN_RELE(vp);
4878 4879 VN_RELE(ZTOV(sharedir));
4879 4880
4880 4881 ZFS_EXIT(zfsvfs);
4881 4882
4882 4883 return (error);
4883 4884 }
4884 4885
4885 4886 /*
4886 4887 * inputs:
4887 4888 * zc_name name of filesystem
4888 4889 * zc_value short name of snap
4889 4890 * zc_string user-supplied tag for this hold
4890 4891 * zc_cookie recursive flag
4891 4892 * zc_temphold set if hold is temporary
4892 4893 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4893 4894 * zc_sendobj if non-zero, the objid for zc_name@zc_value
4894 4895 * zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg
4895 4896 *
4896 4897 * outputs: none
4897 4898 */
4898 4899 static int
4899 4900 zfs_ioc_hold(zfs_cmd_t *zc)
4900 4901 {
4901 4902 boolean_t recursive = zc->zc_cookie;
4902 4903 spa_t *spa;
4903 4904 dsl_pool_t *dp;
4904 4905 dsl_dataset_t *ds;
4905 4906 int error;
4906 4907 minor_t minor = 0;
4907 4908
4908 4909 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
4909 4910 return (EINVAL);
4910 4911
4911 4912 if (zc->zc_sendobj == 0) {
4912 4913 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
4913 4914 zc->zc_string, recursive, zc->zc_temphold,
4914 4915 zc->zc_cleanup_fd));
4915 4916 }
4916 4917
4917 4918 if (recursive)
4918 4919 return (EINVAL);
4919 4920
4920 4921 error = spa_open(zc->zc_name, &spa, FTAG);
4921 4922 if (error)
4922 4923 return (error);
4923 4924
4924 4925 dp = spa_get_dsl(spa);
4925 4926 rw_enter(&dp->dp_config_rwlock, RW_READER);
4926 4927 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
4927 4928 rw_exit(&dp->dp_config_rwlock);
4928 4929 spa_close(spa, FTAG);
4929 4930 if (error)
4930 4931 return (error);
4931 4932
4932 4933 /*
4933 4934 * Until we have a hold on this snapshot, it's possible that
4934 4935 * zc_sendobj could've been destroyed and reused as part
4935 4936 * of a later txg. Make sure we're looking at the right object.
4936 4937 */
4937 4938 if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
4938 4939 dsl_dataset_rele(ds, FTAG);
4939 4940 return (ENOENT);
4940 4941 }
4941 4942
4942 4943 if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
4943 4944 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4944 4945 if (error) {
4945 4946 dsl_dataset_rele(ds, FTAG);
4946 4947 return (error);
4947 4948 }
4948 4949 }
4949 4950
4950 4951 error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
4951 4952 zc->zc_temphold);
4952 4953 if (minor != 0) {
4953 4954 if (error == 0) {
4954 4955 dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
4955 4956 minor);
4956 4957 }
4957 4958 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4958 4959 }
4959 4960 dsl_dataset_rele(ds, FTAG);
4960 4961
4961 4962 return (error);
4962 4963 }
4963 4964
4964 4965 /*
4965 4966 * inputs:
4966 4967 * zc_name name of dataset from which we're releasing a user hold
4967 4968 * zc_value short name of snap
4968 4969 * zc_string user-supplied tag for this hold
4969 4970 * zc_cookie recursive flag
4970 4971 *
4971 4972 * outputs: none
4972 4973 */
4973 4974 static int
4974 4975 zfs_ioc_release(zfs_cmd_t *zc)
4975 4976 {
4976 4977 boolean_t recursive = zc->zc_cookie;
4977 4978
4978 4979 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
4979 4980 return (EINVAL);
4980 4981
4981 4982 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
4982 4983 zc->zc_string, recursive));
4983 4984 }
4984 4985
4985 4986 /*
4986 4987 * inputs:
4987 4988 * zc_name name of filesystem
4988 4989 *
4989 4990 * outputs:
4990 4991 * zc_nvlist_src{_size} nvlist of snapshot holds
4991 4992 */
4992 4993 static int
4993 4994 zfs_ioc_get_holds(zfs_cmd_t *zc)
4994 4995 {
4995 4996 nvlist_t *nvp;
4996 4997 int error;
4997 4998
4998 4999 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
4999 5000 error = put_nvlist(zc, nvp);
5000 5001 nvlist_free(nvp);
5001 5002 }
5002 5003
5003 5004 return (error);
5004 5005 }
5005 5006
5006 5007 /*
5007 5008 * inputs:
5008 5009 * zc_name name of new filesystem or snapshot
5009 5010 * zc_value full name of old snapshot
5010 5011 *
5011 5012 * outputs:
5012 5013 * zc_cookie space in bytes
5013 5014 * zc_objset_type compressed space in bytes
5014 5015 * zc_perm_action uncompressed space in bytes
5015 5016 */
5016 5017 static int
5017 5018 zfs_ioc_space_written(zfs_cmd_t *zc)
5018 5019 {
5019 5020 int error;
5020 5021 dsl_dataset_t *new, *old;
5021 5022
5022 5023 error = dsl_dataset_hold(zc->zc_name, FTAG, &new);
5023 5024 if (error != 0)
5024 5025 return (error);
5025 5026 error = dsl_dataset_hold(zc->zc_value, FTAG, &old);
5026 5027 if (error != 0) {
5027 5028 dsl_dataset_rele(new, FTAG);
5028 5029 return (error);
5029 5030 }
5030 5031
5031 5032 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5032 5033 &zc->zc_objset_type, &zc->zc_perm_action);
5033 5034 dsl_dataset_rele(old, FTAG);
5034 5035 dsl_dataset_rele(new, FTAG);
5035 5036 return (error);
5036 5037 }
5037 5038 /*
5038 5039 * innvl: {
5039 5040 * "firstsnap" -> snapshot name
5040 5041 * }
5041 5042 *
5042 5043 * outnvl: {
5043 5044 * "used" -> space in bytes
5044 5045 * "compressed" -> compressed space in bytes
5045 5046 * "uncompressed" -> uncompressed space in bytes
5046 5047 * }
5047 5048 */
5048 5049 static int
5049 5050 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5050 5051 {
5051 5052 int error;
5052 5053 dsl_dataset_t *new, *old;
5053 5054 char *firstsnap;
5054 5055 uint64_t used, comp, uncomp;
5055 5056
5056 5057 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5057 5058 return (EINVAL);
5058 5059
5059 5060 error = dsl_dataset_hold(lastsnap, FTAG, &new);
5060 5061 if (error != 0)
5061 5062 return (error);
5062 5063 error = dsl_dataset_hold(firstsnap, FTAG, &old);
5063 5064 if (error != 0) {
5064 5065 dsl_dataset_rele(new, FTAG);
5065 5066 return (error);
5066 5067 }
5067 5068
5068 5069 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5069 5070 dsl_dataset_rele(old, FTAG);
5070 5071 dsl_dataset_rele(new, FTAG);
5071 5072 fnvlist_add_uint64(outnvl, "used", used);
5072 5073 fnvlist_add_uint64(outnvl, "compressed", comp);
5073 5074 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5074 5075 return (error);
5075 5076 }
5076 5077
5077 5078 /*
5078 5079 * innvl: {
5079 5080 * "fd" -> file descriptor to write stream to (int32)
5080 5081 * (optional) "fromsnap" -> full snap name to send an incremental from
5081 5082 * }
5082 5083 *
5083 5084 * outnvl is unused
5084 5085 */
5085 5086 /* ARGSUSED */
5086 5087 static int
5087 5088 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5088 5089 {
5089 5090 objset_t *fromsnap = NULL;
5090 5091 objset_t *tosnap;
5091 5092 int error;
5092 5093 offset_t off;
5093 5094 char *fromname;
5094 5095 int fd;
5095 5096
5096 5097 error = nvlist_lookup_int32(innvl, "fd", &fd);
5097 5098 if (error != 0)
5098 5099 return (EINVAL);
5099 5100
5100 5101 error = dmu_objset_hold(snapname, FTAG, &tosnap);
5101 5102 if (error)
5102 5103 return (error);
5103 5104
5104 5105 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5105 5106 if (error == 0) {
5106 5107 error = dmu_objset_hold(fromname, FTAG, &fromsnap);
5107 5108 if (error) {
5108 5109 dmu_objset_rele(tosnap, FTAG);
5109 5110 return (error);
5110 5111 }
5111 5112 }
5112 5113
5113 5114 file_t *fp = getf(fd);
5114 5115 if (fp == NULL) {
5115 5116 dmu_objset_rele(tosnap, FTAG);
5116 5117 if (fromsnap != NULL)
5117 5118 dmu_objset_rele(fromsnap, FTAG);
5118 5119 return (EBADF);
5119 5120 }
5120 5121
5121 5122 off = fp->f_offset;
5122 5123 error = dmu_send(tosnap, fromsnap, fd, fp->f_vnode, &off);
5123 5124
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5124 5125 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5125 5126 fp->f_offset = off;
5126 5127 releasef(fd);
5127 5128 if (fromsnap != NULL)
5128 5129 dmu_objset_rele(fromsnap, FTAG);
5129 5130 dmu_objset_rele(tosnap, FTAG);
5130 5131 return (error);
5131 5132 }
5132 5133
5133 5134 /*
5135 + * inputs:
5136 + * zc_name name of snapshot to send
5137 + * zc_cookie file descriptor to send stream to
5138 + * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
5139 + * zc_sendobj objsetid of snapshot to send
5140 + * zc_fromobj objsetid of incremental fromsnap (may be zero)
5141 + * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
5142 + * output size in zc_objset_type.
5143 + *
5144 + * outputs: none
5145 + */
5146 +static int
5147 +zfs_ioc_fits_send(zfs_cmd_t *zc)
5148 +{
5149 + objset_t *fromsnap = NULL;
5150 + objset_t *tosnap;
5151 + int error;
5152 + offset_t off;
5153 + dsl_dataset_t *ds;
5154 + dsl_dataset_t *dsfrom = NULL;
5155 + spa_t *spa;
5156 + file_t *fp;
5157 + dsl_pool_t *dp;
5158 + boolean_t estimate = (zc->zc_guid != 0);
5159 +
5160 + error = spa_open(zc->zc_name, &spa, FTAG);
5161 + if (error)
5162 + return (error);
5163 +
5164 + dp = spa_get_dsl(spa);
5165 + rw_enter(&dp->dp_config_rwlock, RW_READER);
5166 + error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
5167 + rw_exit(&dp->dp_config_rwlock);
5168 + spa_close(spa, FTAG);
5169 + if (error)
5170 + return (error);
5171 +
5172 + error = dmu_objset_from_ds(ds, &tosnap);
5173 + if (error) {
5174 + dsl_dataset_rele(ds, FTAG);
5175 + return (error);
5176 + }
5177 +
5178 + if (zc->zc_fromobj != 0) {
5179 + rw_enter(&dp->dp_config_rwlock, RW_READER);
5180 + error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
5181 + rw_exit(&dp->dp_config_rwlock);
5182 + if (error) {
5183 + dsl_dataset_rele(ds, FTAG);
5184 + return (error);
5185 + }
5186 + error = dmu_objset_from_ds(dsfrom, &fromsnap);
5187 + if (error) {
5188 + dsl_dataset_rele(dsfrom, FTAG);
5189 + dsl_dataset_rele(ds, FTAG);
5190 + return (error);
5191 + }
5192 + }
5193 +
5194 + if (zc->zc_obj) {
5195 + dsl_pool_t *dp = ds->ds_dir->dd_pool;
5196 +
5197 + if (fromsnap != NULL) {
5198 + dsl_dataset_rele(dsfrom, FTAG);
5199 + dsl_dataset_rele(ds, FTAG);
5200 + return (EINVAL);
5201 + }
5202 +
5203 + if (dsl_dir_is_clone(ds->ds_dir)) {
5204 + rw_enter(&dp->dp_config_rwlock, RW_READER);
5205 + error = dsl_dataset_hold_obj(dp,
5206 + ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &dsfrom);
5207 + rw_exit(&dp->dp_config_rwlock);
5208 + if (error) {
5209 + dsl_dataset_rele(ds, FTAG);
5210 + return (error);
5211 + }
5212 + error = dmu_objset_from_ds(dsfrom, &fromsnap);
5213 + if (error) {
5214 + dsl_dataset_rele(dsfrom, FTAG);
5215 + dsl_dataset_rele(ds, FTAG);
5216 + return (error);
5217 + }
5218 + }
5219 + }
5220 +
5221 + fp = getf(zc->zc_cookie);
5222 + if (fp == NULL) {
5223 + dsl_dataset_rele(ds, FTAG);
5224 + if (dsfrom)
5225 + dsl_dataset_rele(dsfrom, FTAG);
5226 + return (EBADF);
5227 + }
5228 +
5229 + off = fp->f_offset;
5230 + error = fits_send(tosnap, fromsnap, zc->zc_cookie, fp->f_vnode, &off);
5231 +
5232 + if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5233 + fp->f_offset = off;
5234 + releasef(zc->zc_cookie);
5235 +
5236 + if (dsfrom)
5237 + dsl_dataset_rele(dsfrom, FTAG);
5238 + dsl_dataset_rele(ds, FTAG);
5239 + return (error);
5240 +}
5241 +
5242 +/*
5134 5243 * Determine approximately how large a zfs send stream will be -- the number
5135 5244 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5136 5245 *
5137 5246 * innvl: {
5138 5247 * (optional) "fromsnap" -> full snap name to send an incremental from
5139 5248 * }
5140 5249 *
5141 5250 * outnvl: {
5142 5251 * "space" -> bytes of space (uint64)
5143 5252 * }
5144 5253 */
5145 5254 static int
5146 5255 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5147 5256 {
5148 5257 objset_t *fromsnap = NULL;
5149 5258 objset_t *tosnap;
5150 5259 int error;
5151 5260 char *fromname;
5152 5261 uint64_t space;
5153 5262
5154 5263 error = dmu_objset_hold(snapname, FTAG, &tosnap);
5155 5264 if (error)
5156 5265 return (error);
5157 5266
5158 5267 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5159 5268 if (error == 0) {
5160 5269 error = dmu_objset_hold(fromname, FTAG, &fromsnap);
5161 5270 if (error) {
5162 5271 dmu_objset_rele(tosnap, FTAG);
5163 5272 return (error);
5164 5273 }
5165 5274 }
5166 5275
5167 5276 error = dmu_send_estimate(tosnap, fromsnap, &space);
5168 5277 fnvlist_add_uint64(outnvl, "space", space);
5169 5278
5170 5279 if (fromsnap != NULL)
5171 5280 dmu_objset_rele(fromsnap, FTAG);
5172 5281 dmu_objset_rele(tosnap, FTAG);
5173 5282 return (error);
5174 5283 }
5175 5284
5176 5285
5177 5286 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5178 5287
5179 5288 static void
5180 5289 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5181 5290 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5182 5291 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5183 5292 {
5184 5293 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5185 5294
5186 5295 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5187 5296 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5188 5297 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5189 5298 ASSERT3P(vec->zvec_func, ==, NULL);
5190 5299
5191 5300 vec->zvec_legacy_func = func;
5192 5301 vec->zvec_secpolicy = secpolicy;
5193 5302 vec->zvec_namecheck = namecheck;
5194 5303 vec->zvec_allow_log = log_history;
5195 5304 vec->zvec_pool_check = pool_check;
5196 5305 }
5197 5306
5198 5307 /*
5199 5308 * See the block comment at the beginning of this file for details on
5200 5309 * each argument to this function.
5201 5310 */
5202 5311 static void
5203 5312 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5204 5313 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5205 5314 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5206 5315 boolean_t allow_log)
5207 5316 {
5208 5317 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5209 5318
5210 5319 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5211 5320 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5212 5321 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5213 5322 ASSERT3P(vec->zvec_func, ==, NULL);
5214 5323
5215 5324 /* if we are logging, the name must be valid */
5216 5325 ASSERT(!allow_log || namecheck != NO_NAME);
5217 5326
5218 5327 vec->zvec_name = name;
5219 5328 vec->zvec_func = func;
5220 5329 vec->zvec_secpolicy = secpolicy;
5221 5330 vec->zvec_namecheck = namecheck;
5222 5331 vec->zvec_pool_check = pool_check;
5223 5332 vec->zvec_smush_outnvlist = smush_outnvlist;
5224 5333 vec->zvec_allow_log = allow_log;
5225 5334 }
5226 5335
5227 5336 static void
5228 5337 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5229 5338 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5230 5339 zfs_ioc_poolcheck_t pool_check)
5231 5340 {
5232 5341 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5233 5342 POOL_NAME, log_history, pool_check);
5234 5343 }
5235 5344
5236 5345 static void
5237 5346 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5238 5347 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5239 5348 {
5240 5349 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5241 5350 DATASET_NAME, B_FALSE, pool_check);
5242 5351 }
5243 5352
5244 5353 static void
5245 5354 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5246 5355 {
5247 5356 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5248 5357 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5249 5358 }
5250 5359
5251 5360 static void
5252 5361 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5253 5362 zfs_secpolicy_func_t *secpolicy)
5254 5363 {
5255 5364 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5256 5365 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5257 5366 }
5258 5367
5259 5368 static void
5260 5369 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5261 5370 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5262 5371 {
5263 5372 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5264 5373 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5265 5374 }
5266 5375
5267 5376 static void
5268 5377 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5269 5378 {
5270 5379 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5271 5380 zfs_secpolicy_read);
5272 5381 }
5273 5382
5274 5383 static void
5275 5384 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5276 5385 zfs_secpolicy_func_t *secpolicy)
5277 5386 {
5278 5387 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5279 5388 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5280 5389 }
5281 5390
5282 5391 static void
5283 5392 zfs_ioctl_init(void)
5284 5393 {
5285 5394 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5286 5395 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5287 5396 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5288 5397
5289 5398 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5290 5399 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5291 5400 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5292 5401
5293 5402 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5294 5403 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5295 5404 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5296 5405
5297 5406 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5298 5407 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5299 5408 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5300 5409
5301 5410 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5302 5411 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5303 5412 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5304 5413
5305 5414 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5306 5415 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5307 5416 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5308 5417
5309 5418 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5310 5419 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5311 5420 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5312 5421
5313 5422 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5314 5423 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5315 5424 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5316 5425
5317 5426 /* IOCTLS that use the legacy function signature */
5318 5427
5319 5428 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5320 5429 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5321 5430
5322 5431 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5323 5432 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5324 5433 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5325 5434 zfs_ioc_pool_scan);
5326 5435 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5327 5436 zfs_ioc_pool_upgrade);
5328 5437 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5329 5438 zfs_ioc_vdev_add);
5330 5439 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5331 5440 zfs_ioc_vdev_remove);
5332 5441 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5333 5442 zfs_ioc_vdev_set_state);
5334 5443 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5335 5444 zfs_ioc_vdev_attach);
5336 5445 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5337 5446 zfs_ioc_vdev_detach);
5338 5447 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5339 5448 zfs_ioc_vdev_setpath);
5340 5449 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5341 5450 zfs_ioc_vdev_setfru);
5342 5451 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5343 5452 zfs_ioc_pool_set_props);
5344 5453 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5345 5454 zfs_ioc_vdev_split);
5346 5455 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5347 5456 zfs_ioc_pool_reguid);
5348 5457
5349 5458 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5350 5459 zfs_ioc_pool_configs, zfs_secpolicy_none);
5351 5460 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5352 5461 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5353 5462 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5354 5463 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5355 5464 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5356 5465 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5357 5466 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5358 5467 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5359 5468
5360 5469 /*
5361 5470 * pool destroy, and export don't log the history as part of
5362 5471 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5363 5472 * does the logging of those commands.
5364 5473 */
5365 5474 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5366 5475 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5367 5476 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5368 5477 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5369 5478
5370 5479 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5371 5480 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5372 5481 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5373 5482 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5374 5483
5375 5484 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5376 5485 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5377 5486 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5378 5487 zfs_ioc_dsobj_to_dsname,
5379 5488 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5380 5489 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5381 5490 zfs_ioc_pool_get_history,
5382 5491 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5383 5492
5384 5493 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5385 5494 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5386 5495
5387 5496 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5388 5497 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5389 5498 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5390 5499 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5391 5500
5392 5501 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5393 5502 zfs_ioc_space_written);
5394 5503 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_HOLDS,
5395 5504 zfs_ioc_get_holds);
5396 5505 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5397 5506 zfs_ioc_objset_recvd_props);
5398 5507 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5399 5508 zfs_ioc_next_obj);
5400 5509 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5401 5510 zfs_ioc_get_fsacl);
5402 5511 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5403 5512 zfs_ioc_objset_stats);
5404 5513 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5405 5514 zfs_ioc_objset_zplprops);
5406 5515 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5407 5516 zfs_ioc_dataset_list_next);
5408 5517 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5409 5518 zfs_ioc_snapshot_list_next);
5410 5519 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5411 5520 zfs_ioc_send_progress);
5412 5521
5413 5522 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5414 5523 zfs_ioc_diff, zfs_secpolicy_diff);
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5415 5524 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5416 5525 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5417 5526 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5418 5527 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5419 5528 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5420 5529 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5421 5530 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5422 5531 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5423 5532 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5424 5533 zfs_ioc_send, zfs_secpolicy_send);
5534 + zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_FITS_SEND,
5535 + zfs_ioc_fits_send, zfs_secpolicy_send);
5425 5536
5426 5537 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5427 5538 zfs_secpolicy_none);
5428 5539 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5429 5540 zfs_secpolicy_destroy);
5430 5541 zfs_ioctl_register_dataset_modify(ZFS_IOC_ROLLBACK, zfs_ioc_rollback,
5431 5542 zfs_secpolicy_rollback);
5432 5543 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5433 5544 zfs_secpolicy_rename);
5434 5545 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5435 5546 zfs_secpolicy_recv);
5436 5547 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5437 5548 zfs_secpolicy_promote);
5438 5549 zfs_ioctl_register_dataset_modify(ZFS_IOC_HOLD, zfs_ioc_hold,
5439 5550 zfs_secpolicy_hold);
5440 5551 zfs_ioctl_register_dataset_modify(ZFS_IOC_RELEASE, zfs_ioc_release,
5441 5552 zfs_secpolicy_release);
5442 5553 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5443 5554 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5444 5555 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5445 5556 zfs_secpolicy_set_fsacl);
5446 5557
5447 5558 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5448 5559 zfs_secpolicy_share, POOL_CHECK_NONE);
5449 5560 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5450 5561 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5451 5562 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5452 5563 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5453 5564 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5454 5565 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5455 5566 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5456 5567 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5457 5568 }
5458 5569
5459 5570 int
5460 5571 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5461 5572 zfs_ioc_poolcheck_t check)
5462 5573 {
5463 5574 spa_t *spa;
5464 5575 int error;
5465 5576
5466 5577 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5467 5578
5468 5579 if (check & POOL_CHECK_NONE)
5469 5580 return (0);
5470 5581
5471 5582 error = spa_open(name, &spa, FTAG);
5472 5583 if (error == 0) {
5473 5584 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5474 5585 error = EAGAIN;
5475 5586 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5476 5587 error = EROFS;
5477 5588 spa_close(spa, FTAG);
5478 5589 }
5479 5590 return (error);
5480 5591 }
5481 5592
5482 5593 /*
5483 5594 * Find a free minor number.
5484 5595 */
5485 5596 minor_t
5486 5597 zfsdev_minor_alloc(void)
5487 5598 {
5488 5599 static minor_t last_minor;
5489 5600 minor_t m;
5490 5601
5491 5602 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5492 5603
5493 5604 for (m = last_minor + 1; m != last_minor; m++) {
5494 5605 if (m > ZFSDEV_MAX_MINOR)
5495 5606 m = 1;
5496 5607 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5497 5608 last_minor = m;
5498 5609 return (m);
5499 5610 }
5500 5611 }
5501 5612
5502 5613 return (0);
5503 5614 }
5504 5615
5505 5616 static int
5506 5617 zfs_ctldev_init(dev_t *devp)
5507 5618 {
5508 5619 minor_t minor;
5509 5620 zfs_soft_state_t *zs;
5510 5621
5511 5622 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5512 5623 ASSERT(getminor(*devp) == 0);
5513 5624
5514 5625 minor = zfsdev_minor_alloc();
5515 5626 if (minor == 0)
5516 5627 return (ENXIO);
5517 5628
5518 5629 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5519 5630 return (EAGAIN);
5520 5631
5521 5632 *devp = makedevice(getemajor(*devp), minor);
5522 5633
5523 5634 zs = ddi_get_soft_state(zfsdev_state, minor);
5524 5635 zs->zss_type = ZSST_CTLDEV;
5525 5636 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5526 5637
5527 5638 return (0);
5528 5639 }
5529 5640
5530 5641 static void
5531 5642 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5532 5643 {
5533 5644 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5534 5645
5535 5646 zfs_onexit_destroy(zo);
5536 5647 ddi_soft_state_free(zfsdev_state, minor);
5537 5648 }
5538 5649
5539 5650 void *
5540 5651 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5541 5652 {
5542 5653 zfs_soft_state_t *zp;
5543 5654
5544 5655 zp = ddi_get_soft_state(zfsdev_state, minor);
5545 5656 if (zp == NULL || zp->zss_type != which)
5546 5657 return (NULL);
5547 5658
5548 5659 return (zp->zss_data);
5549 5660 }
5550 5661
5551 5662 static int
5552 5663 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5553 5664 {
5554 5665 int error = 0;
5555 5666
5556 5667 if (getminor(*devp) != 0)
5557 5668 return (zvol_open(devp, flag, otyp, cr));
5558 5669
5559 5670 /* This is the control device. Allocate a new minor if requested. */
5560 5671 if (flag & FEXCL) {
5561 5672 mutex_enter(&zfsdev_state_lock);
5562 5673 error = zfs_ctldev_init(devp);
5563 5674 mutex_exit(&zfsdev_state_lock);
5564 5675 }
5565 5676
5566 5677 return (error);
5567 5678 }
5568 5679
5569 5680 static int
5570 5681 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5571 5682 {
5572 5683 zfs_onexit_t *zo;
5573 5684 minor_t minor = getminor(dev);
5574 5685
5575 5686 if (minor == 0)
5576 5687 return (0);
5577 5688
5578 5689 mutex_enter(&zfsdev_state_lock);
5579 5690 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5580 5691 if (zo == NULL) {
5581 5692 mutex_exit(&zfsdev_state_lock);
5582 5693 return (zvol_close(dev, flag, otyp, cr));
5583 5694 }
5584 5695 zfs_ctldev_destroy(zo, minor);
5585 5696 mutex_exit(&zfsdev_state_lock);
5586 5697
5587 5698 return (0);
5588 5699 }
5589 5700
5590 5701 static int
5591 5702 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5592 5703 {
5593 5704 zfs_cmd_t *zc;
5594 5705 uint_t vecnum;
5595 5706 int error, rc, len;
5596 5707 minor_t minor = getminor(dev);
5597 5708 const zfs_ioc_vec_t *vec;
5598 5709 char *saved_poolname = NULL;
5599 5710 nvlist_t *innvl = NULL;
5600 5711
5601 5712 if (minor != 0 &&
5602 5713 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5603 5714 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5604 5715
5605 5716 vecnum = cmd - ZFS_IOC_FIRST;
5606 5717 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5607 5718
5608 5719 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5609 5720 return (EINVAL);
5610 5721 vec = &zfs_ioc_vec[vecnum];
5611 5722
5612 5723 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5613 5724
5614 5725 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5615 5726 if (error != 0) {
5616 5727 error = EFAULT;
5617 5728 goto out;
5618 5729 }
5619 5730
5620 5731 zc->zc_iflags = flag & FKIOCTL;
5621 5732 if (zc->zc_nvlist_src_size != 0) {
5622 5733 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5623 5734 zc->zc_iflags, &innvl);
5624 5735 if (error != 0)
5625 5736 goto out;
5626 5737 }
5627 5738
5628 5739 /*
5629 5740 * Ensure that all pool/dataset names are valid before we pass down to
5630 5741 * the lower layers.
5631 5742 */
5632 5743 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5633 5744 switch (vec->zvec_namecheck) {
5634 5745 case POOL_NAME:
5635 5746 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5636 5747 error = EINVAL;
5637 5748 else
5638 5749 error = pool_status_check(zc->zc_name,
5639 5750 vec->zvec_namecheck, vec->zvec_pool_check);
5640 5751 break;
5641 5752
5642 5753 case DATASET_NAME:
5643 5754 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5644 5755 error = EINVAL;
5645 5756 else
5646 5757 error = pool_status_check(zc->zc_name,
5647 5758 vec->zvec_namecheck, vec->zvec_pool_check);
5648 5759 break;
5649 5760
5650 5761 case NO_NAME:
5651 5762 break;
5652 5763 }
5653 5764
5654 5765
5655 5766 if (error == 0 && !(flag & FKIOCTL))
5656 5767 error = vec->zvec_secpolicy(zc, innvl, cr);
5657 5768
5658 5769 if (error != 0)
5659 5770 goto out;
5660 5771
5661 5772 /* legacy ioctls can modify zc_name */
5662 5773 len = strcspn(zc->zc_name, "/@") + 1;
5663 5774 saved_poolname = kmem_alloc(len, KM_SLEEP);
5664 5775 (void) strlcpy(saved_poolname, zc->zc_name, len);
5665 5776
5666 5777 if (vec->zvec_func != NULL) {
5667 5778 nvlist_t *outnvl;
5668 5779 int puterror = 0;
5669 5780 spa_t *spa;
5670 5781 nvlist_t *lognv = NULL;
5671 5782
5672 5783 ASSERT(vec->zvec_legacy_func == NULL);
5673 5784
5674 5785 /*
5675 5786 * Add the innvl to the lognv before calling the func,
5676 5787 * in case the func changes the innvl.
5677 5788 */
5678 5789 if (vec->zvec_allow_log) {
5679 5790 lognv = fnvlist_alloc();
5680 5791 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5681 5792 vec->zvec_name);
5682 5793 if (!nvlist_empty(innvl)) {
5683 5794 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5684 5795 innvl);
5685 5796 }
5686 5797 }
5687 5798
5688 5799 outnvl = fnvlist_alloc();
5689 5800 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5690 5801
5691 5802 if (error == 0 && vec->zvec_allow_log &&
5692 5803 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5693 5804 if (!nvlist_empty(outnvl)) {
5694 5805 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5695 5806 outnvl);
5696 5807 }
5697 5808 (void) spa_history_log_nvl(spa, lognv);
5698 5809 spa_close(spa, FTAG);
5699 5810 }
5700 5811 fnvlist_free(lognv);
5701 5812
5702 5813 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5703 5814 int smusherror = 0;
5704 5815 if (vec->zvec_smush_outnvlist) {
5705 5816 smusherror = nvlist_smush(outnvl,
5706 5817 zc->zc_nvlist_dst_size);
5707 5818 }
5708 5819 if (smusherror == 0)
5709 5820 puterror = put_nvlist(zc, outnvl);
5710 5821 }
5711 5822
5712 5823 if (puterror != 0)
5713 5824 error = puterror;
5714 5825
5715 5826 nvlist_free(outnvl);
5716 5827 } else {
5717 5828 error = vec->zvec_legacy_func(zc);
5718 5829 }
5719 5830
5720 5831 out:
5721 5832 nvlist_free(innvl);
5722 5833 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5723 5834 if (error == 0 && rc != 0)
5724 5835 error = EFAULT;
5725 5836 if (error == 0 && vec->zvec_allow_log) {
5726 5837 char *s = tsd_get(zfs_allow_log_key);
5727 5838 if (s != NULL)
5728 5839 strfree(s);
5729 5840 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5730 5841 } else {
5731 5842 if (saved_poolname != NULL)
5732 5843 strfree(saved_poolname);
5733 5844 }
5734 5845
5735 5846 kmem_free(zc, sizeof (zfs_cmd_t));
5736 5847 return (error);
5737 5848 }
5738 5849
5739 5850 static int
5740 5851 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5741 5852 {
5742 5853 if (cmd != DDI_ATTACH)
5743 5854 return (DDI_FAILURE);
5744 5855
5745 5856 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5746 5857 DDI_PSEUDO, 0) == DDI_FAILURE)
5747 5858 return (DDI_FAILURE);
5748 5859
5749 5860 zfs_dip = dip;
5750 5861
5751 5862 ddi_report_dev(dip);
5752 5863
5753 5864 return (DDI_SUCCESS);
5754 5865 }
5755 5866
5756 5867 static int
5757 5868 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5758 5869 {
5759 5870 if (spa_busy() || zfs_busy() || zvol_busy())
5760 5871 return (DDI_FAILURE);
5761 5872
5762 5873 if (cmd != DDI_DETACH)
5763 5874 return (DDI_FAILURE);
5764 5875
5765 5876 zfs_dip = NULL;
5766 5877
5767 5878 ddi_prop_remove_all(dip);
5768 5879 ddi_remove_minor_node(dip, NULL);
5769 5880
5770 5881 return (DDI_SUCCESS);
5771 5882 }
5772 5883
5773 5884 /*ARGSUSED*/
5774 5885 static int
5775 5886 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5776 5887 {
5777 5888 switch (infocmd) {
5778 5889 case DDI_INFO_DEVT2DEVINFO:
5779 5890 *result = zfs_dip;
5780 5891 return (DDI_SUCCESS);
5781 5892
5782 5893 case DDI_INFO_DEVT2INSTANCE:
5783 5894 *result = (void *)0;
5784 5895 return (DDI_SUCCESS);
5785 5896 }
5786 5897
5787 5898 return (DDI_FAILURE);
5788 5899 }
5789 5900
5790 5901 /*
5791 5902 * OK, so this is a little weird.
5792 5903 *
5793 5904 * /dev/zfs is the control node, i.e. minor 0.
5794 5905 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5795 5906 *
5796 5907 * /dev/zfs has basically nothing to do except serve up ioctls,
5797 5908 * so most of the standard driver entry points are in zvol.c.
5798 5909 */
5799 5910 static struct cb_ops zfs_cb_ops = {
5800 5911 zfsdev_open, /* open */
5801 5912 zfsdev_close, /* close */
5802 5913 zvol_strategy, /* strategy */
5803 5914 nodev, /* print */
5804 5915 zvol_dump, /* dump */
5805 5916 zvol_read, /* read */
5806 5917 zvol_write, /* write */
5807 5918 zfsdev_ioctl, /* ioctl */
5808 5919 nodev, /* devmap */
5809 5920 nodev, /* mmap */
5810 5921 nodev, /* segmap */
5811 5922 nochpoll, /* poll */
5812 5923 ddi_prop_op, /* prop_op */
5813 5924 NULL, /* streamtab */
5814 5925 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5815 5926 CB_REV, /* version */
5816 5927 nodev, /* async read */
5817 5928 nodev, /* async write */
5818 5929 };
5819 5930
5820 5931 static struct dev_ops zfs_dev_ops = {
5821 5932 DEVO_REV, /* version */
5822 5933 0, /* refcnt */
5823 5934 zfs_info, /* info */
5824 5935 nulldev, /* identify */
5825 5936 nulldev, /* probe */
5826 5937 zfs_attach, /* attach */
5827 5938 zfs_detach, /* detach */
5828 5939 nodev, /* reset */
5829 5940 &zfs_cb_ops, /* driver operations */
5830 5941 NULL, /* no bus operations */
5831 5942 NULL, /* power */
5832 5943 ddi_quiesce_not_needed, /* quiesce */
5833 5944 };
5834 5945
5835 5946 static struct modldrv zfs_modldrv = {
5836 5947 &mod_driverops,
5837 5948 "ZFS storage pool",
5838 5949 &zfs_dev_ops
5839 5950 };
5840 5951
5841 5952 static struct modlinkage modlinkage = {
5842 5953 MODREV_1,
5843 5954 (void *)&zfs_modlfs,
5844 5955 (void *)&zfs_modldrv,
5845 5956 NULL
5846 5957 };
5847 5958
5848 5959 static void
5849 5960 zfs_allow_log_destroy(void *arg)
5850 5961 {
5851 5962 char *poolname = arg;
5852 5963 strfree(poolname);
5853 5964 }
5854 5965
5855 5966 int
5856 5967 _init(void)
5857 5968 {
5858 5969 int error;
5859 5970
5860 5971 spa_init(FREAD | FWRITE);
5861 5972 zfs_init();
5862 5973 zvol_init();
5863 5974 zfs_ioctl_init();
5864 5975
5865 5976 if ((error = mod_install(&modlinkage)) != 0) {
5866 5977 zvol_fini();
5867 5978 zfs_fini();
5868 5979 spa_fini();
5869 5980 return (error);
5870 5981 }
5871 5982
5872 5983 tsd_create(&zfs_fsyncer_key, NULL);
5873 5984 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5874 5985 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5875 5986
5876 5987 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5877 5988 ASSERT(error == 0);
5878 5989 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5879 5990
5880 5991 return (0);
5881 5992 }
5882 5993
5883 5994 int
5884 5995 _fini(void)
5885 5996 {
5886 5997 int error;
5887 5998
5888 5999 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5889 6000 return (EBUSY);
5890 6001
5891 6002 if ((error = mod_remove(&modlinkage)) != 0)
5892 6003 return (error);
5893 6004
5894 6005 zvol_fini();
5895 6006 zfs_fini();
5896 6007 spa_fini();
5897 6008 if (zfs_nfsshare_inited)
5898 6009 (void) ddi_modclose(nfs_mod);
5899 6010 if (zfs_smbshare_inited)
5900 6011 (void) ddi_modclose(smbsrv_mod);
5901 6012 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5902 6013 (void) ddi_modclose(sharefs_mod);
5903 6014
5904 6015 tsd_destroy(&zfs_fsyncer_key);
5905 6016 ldi_ident_release(zfs_li);
5906 6017 zfs_li = NULL;
5907 6018 mutex_destroy(&zfs_share_lock);
5908 6019
5909 6020 return (error);
5910 6021 }
5911 6022
5912 6023 int
5913 6024 _info(struct modinfo *modinfop)
5914 6025 {
5915 6026 return (mod_info(&modlinkage, modinfop));
5916 6027 }
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