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3954 metaslabs continue to load even after hitting zfs_mg_alloc_failure limit
4080 zpool clear fails to clear pool
4081 need zfs_mg_noalloc_threshold
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
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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) 2013 by Delphix. All rights reserved.
28 28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 30 */
31 31
32 32 /*
33 33 * ZFS ioctls.
34 34 *
35 35 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
36 36 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
37 37 *
38 38 * There are two ways that we handle ioctls: the legacy way where almost
39 39 * all of the logic is in the ioctl callback, and the new way where most
40 40 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
41 41 *
42 42 * Non-legacy ioctls should be registered by calling
43 43 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
44 44 * from userland by lzc_ioctl().
45 45 *
46 46 * The registration arguments are as follows:
47 47 *
48 48 * const char *name
49 49 * The name of the ioctl. This is used for history logging. If the
50 50 * ioctl returns successfully (the callback returns 0), and allow_log
51 51 * is true, then a history log entry will be recorded with the input &
52 52 * output nvlists. The log entry can be printed with "zpool history -i".
53 53 *
54 54 * zfs_ioc_t ioc
55 55 * The ioctl request number, which userland will pass to ioctl(2).
56 56 * The ioctl numbers can change from release to release, because
57 57 * the caller (libzfs) must be matched to the kernel.
58 58 *
59 59 * zfs_secpolicy_func_t *secpolicy
60 60 * This function will be called before the zfs_ioc_func_t, to
61 61 * determine if this operation is permitted. It should return EPERM
62 62 * on failure, and 0 on success. Checks include determining if the
63 63 * dataset is visible in this zone, and if the user has either all
64 64 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
65 65 * to do this operation on this dataset with "zfs allow".
66 66 *
67 67 * zfs_ioc_namecheck_t namecheck
68 68 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
69 69 * name, a dataset name, or nothing. If the name is not well-formed,
70 70 * the ioctl will fail and the callback will not be called.
71 71 * Therefore, the callback can assume that the name is well-formed
72 72 * (e.g. is null-terminated, doesn't have more than one '@' character,
73 73 * doesn't have invalid characters).
74 74 *
75 75 * zfs_ioc_poolcheck_t pool_check
76 76 * This specifies requirements on the pool state. If the pool does
77 77 * not meet them (is suspended or is readonly), the ioctl will fail
78 78 * and the callback will not be called. If any checks are specified
79 79 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
80 80 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
81 81 * POOL_CHECK_READONLY).
82 82 *
83 83 * boolean_t smush_outnvlist
84 84 * If smush_outnvlist is true, then the output is presumed to be a
85 85 * list of errors, and it will be "smushed" down to fit into the
86 86 * caller's buffer, by removing some entries and replacing them with a
87 87 * single "N_MORE_ERRORS" entry indicating how many were removed. See
88 88 * nvlist_smush() for details. If smush_outnvlist is false, and the
89 89 * outnvlist does not fit into the userland-provided buffer, then the
90 90 * ioctl will fail with ENOMEM.
91 91 *
92 92 * zfs_ioc_func_t *func
93 93 * The callback function that will perform the operation.
94 94 *
95 95 * The callback should return 0 on success, or an error number on
96 96 * failure. If the function fails, the userland ioctl will return -1,
97 97 * and errno will be set to the callback's return value. The callback
98 98 * will be called with the following arguments:
99 99 *
100 100 * const char *name
101 101 * The name of the pool or dataset to operate on, from
102 102 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
103 103 * expected type (pool, dataset, or none).
104 104 *
105 105 * nvlist_t *innvl
106 106 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
107 107 * NULL if no input nvlist was provided. Changes to this nvlist are
108 108 * ignored. If the input nvlist could not be deserialized, the
109 109 * ioctl will fail and the callback will not be called.
110 110 *
111 111 * nvlist_t *outnvl
112 112 * The output nvlist, initially empty. The callback can fill it in,
113 113 * and it will be returned to userland by serializing it into
114 114 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
115 115 * fails (e.g. because the caller didn't supply a large enough
116 116 * buffer), then the overall ioctl will fail. See the
117 117 * 'smush_nvlist' argument above for additional behaviors.
118 118 *
119 119 * There are two typical uses of the output nvlist:
120 120 * - To return state, e.g. property values. In this case,
121 121 * smush_outnvlist should be false. If the buffer was not large
122 122 * enough, the caller will reallocate a larger buffer and try
123 123 * the ioctl again.
124 124 *
125 125 * - To return multiple errors from an ioctl which makes on-disk
126 126 * changes. In this case, smush_outnvlist should be true.
127 127 * Ioctls which make on-disk modifications should generally not
128 128 * use the outnvl if they succeed, because the caller can not
129 129 * distinguish between the operation failing, and
130 130 * deserialization failing.
131 131 */
132 132
133 133 #include <sys/types.h>
134 134 #include <sys/param.h>
135 135 #include <sys/errno.h>
136 136 #include <sys/uio.h>
137 137 #include <sys/buf.h>
138 138 #include <sys/modctl.h>
139 139 #include <sys/open.h>
140 140 #include <sys/file.h>
141 141 #include <sys/kmem.h>
142 142 #include <sys/conf.h>
143 143 #include <sys/cmn_err.h>
144 144 #include <sys/stat.h>
145 145 #include <sys/zfs_ioctl.h>
146 146 #include <sys/zfs_vfsops.h>
147 147 #include <sys/zfs_znode.h>
148 148 #include <sys/zap.h>
149 149 #include <sys/spa.h>
150 150 #include <sys/spa_impl.h>
151 151 #include <sys/vdev.h>
152 152 #include <sys/priv_impl.h>
153 153 #include <sys/dmu.h>
154 154 #include <sys/dsl_dir.h>
155 155 #include <sys/dsl_dataset.h>
156 156 #include <sys/dsl_prop.h>
157 157 #include <sys/dsl_deleg.h>
158 158 #include <sys/dmu_objset.h>
159 159 #include <sys/dmu_impl.h>
160 160 #include <sys/dmu_tx.h>
161 161 #include <sys/ddi.h>
162 162 #include <sys/sunddi.h>
163 163 #include <sys/sunldi.h>
164 164 #include <sys/policy.h>
165 165 #include <sys/zone.h>
166 166 #include <sys/nvpair.h>
167 167 #include <sys/pathname.h>
168 168 #include <sys/mount.h>
169 169 #include <sys/sdt.h>
170 170 #include <sys/fs/zfs.h>
171 171 #include <sys/zfs_ctldir.h>
172 172 #include <sys/zfs_dir.h>
173 173 #include <sys/zfs_onexit.h>
174 174 #include <sys/zvol.h>
175 175 #include <sys/dsl_scan.h>
176 176 #include <sharefs/share.h>
177 177 #include <sys/dmu_objset.h>
178 178 #include <sys/dmu_send.h>
179 179 #include <sys/dsl_destroy.h>
180 180 #include <sys/dsl_userhold.h>
181 181 #include <sys/zfeature.h>
182 182
183 183 #include "zfs_namecheck.h"
184 184 #include "zfs_prop.h"
185 185 #include "zfs_deleg.h"
186 186 #include "zfs_comutil.h"
187 187
188 188 extern struct modlfs zfs_modlfs;
189 189
190 190 extern void zfs_init(void);
191 191 extern void zfs_fini(void);
192 192
193 193 ldi_ident_t zfs_li = NULL;
194 194 dev_info_t *zfs_dip;
195 195
196 196 uint_t zfs_fsyncer_key;
197 197 extern uint_t rrw_tsd_key;
198 198 static uint_t zfs_allow_log_key;
199 199
200 200 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
201 201 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
202 202 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
203 203
204 204 typedef enum {
205 205 NO_NAME,
206 206 POOL_NAME,
207 207 DATASET_NAME
208 208 } zfs_ioc_namecheck_t;
209 209
210 210 typedef enum {
211 211 POOL_CHECK_NONE = 1 << 0,
212 212 POOL_CHECK_SUSPENDED = 1 << 1,
213 213 POOL_CHECK_READONLY = 1 << 2,
214 214 } zfs_ioc_poolcheck_t;
215 215
216 216 typedef struct zfs_ioc_vec {
217 217 zfs_ioc_legacy_func_t *zvec_legacy_func;
218 218 zfs_ioc_func_t *zvec_func;
219 219 zfs_secpolicy_func_t *zvec_secpolicy;
220 220 zfs_ioc_namecheck_t zvec_namecheck;
221 221 boolean_t zvec_allow_log;
222 222 zfs_ioc_poolcheck_t zvec_pool_check;
223 223 boolean_t zvec_smush_outnvlist;
224 224 const char *zvec_name;
225 225 } zfs_ioc_vec_t;
226 226
227 227 /* This array is indexed by zfs_userquota_prop_t */
228 228 static const char *userquota_perms[] = {
229 229 ZFS_DELEG_PERM_USERUSED,
230 230 ZFS_DELEG_PERM_USERQUOTA,
231 231 ZFS_DELEG_PERM_GROUPUSED,
232 232 ZFS_DELEG_PERM_GROUPQUOTA,
233 233 };
234 234
235 235 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
236 236 static int zfs_check_settable(const char *name, nvpair_t *property,
237 237 cred_t *cr);
238 238 static int zfs_check_clearable(char *dataset, nvlist_t *props,
239 239 nvlist_t **errors);
240 240 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
241 241 boolean_t *);
242 242 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
243 243 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
244 244
245 245 static int zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature);
246 246
247 247 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
248 248 void
249 249 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
250 250 {
251 251 const char *newfile;
252 252 char buf[512];
253 253 va_list adx;
254 254
255 255 /*
256 256 * Get rid of annoying "../common/" prefix to filename.
257 257 */
258 258 newfile = strrchr(file, '/');
259 259 if (newfile != NULL) {
260 260 newfile = newfile + 1; /* Get rid of leading / */
261 261 } else {
262 262 newfile = file;
263 263 }
264 264
265 265 va_start(adx, fmt);
266 266 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
267 267 va_end(adx);
268 268
269 269 /*
270 270 * To get this data, use the zfs-dprintf probe as so:
271 271 * dtrace -q -n 'zfs-dprintf \
272 272 * /stringof(arg0) == "dbuf.c"/ \
273 273 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
274 274 * arg0 = file name
275 275 * arg1 = function name
276 276 * arg2 = line number
277 277 * arg3 = message
278 278 */
279 279 DTRACE_PROBE4(zfs__dprintf,
280 280 char *, newfile, char *, func, int, line, char *, buf);
281 281 }
282 282
283 283 static void
284 284 history_str_free(char *buf)
285 285 {
286 286 kmem_free(buf, HIS_MAX_RECORD_LEN);
287 287 }
288 288
289 289 static char *
290 290 history_str_get(zfs_cmd_t *zc)
291 291 {
292 292 char *buf;
293 293
294 294 if (zc->zc_history == NULL)
295 295 return (NULL);
296 296
297 297 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
298 298 if (copyinstr((void *)(uintptr_t)zc->zc_history,
299 299 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
300 300 history_str_free(buf);
301 301 return (NULL);
302 302 }
303 303
304 304 buf[HIS_MAX_RECORD_LEN -1] = '\0';
305 305
306 306 return (buf);
307 307 }
308 308
309 309 /*
310 310 * Check to see if the named dataset is currently defined as bootable
311 311 */
312 312 static boolean_t
313 313 zfs_is_bootfs(const char *name)
314 314 {
315 315 objset_t *os;
316 316
317 317 if (dmu_objset_hold(name, FTAG, &os) == 0) {
318 318 boolean_t ret;
319 319 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
320 320 dmu_objset_rele(os, FTAG);
321 321 return (ret);
322 322 }
323 323 return (B_FALSE);
324 324 }
325 325
326 326 /*
327 327 * Return non-zero if the spa version is less than requested version.
328 328 */
329 329 static int
330 330 zfs_earlier_version(const char *name, int version)
331 331 {
332 332 spa_t *spa;
333 333
334 334 if (spa_open(name, &spa, FTAG) == 0) {
335 335 if (spa_version(spa) < version) {
336 336 spa_close(spa, FTAG);
337 337 return (1);
338 338 }
339 339 spa_close(spa, FTAG);
340 340 }
341 341 return (0);
342 342 }
343 343
344 344 /*
345 345 * Return TRUE if the ZPL version is less than requested version.
346 346 */
347 347 static boolean_t
348 348 zpl_earlier_version(const char *name, int version)
349 349 {
350 350 objset_t *os;
351 351 boolean_t rc = B_TRUE;
352 352
353 353 if (dmu_objset_hold(name, FTAG, &os) == 0) {
354 354 uint64_t zplversion;
355 355
356 356 if (dmu_objset_type(os) != DMU_OST_ZFS) {
357 357 dmu_objset_rele(os, FTAG);
358 358 return (B_TRUE);
359 359 }
360 360 /* XXX reading from non-owned objset */
361 361 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
362 362 rc = zplversion < version;
363 363 dmu_objset_rele(os, FTAG);
364 364 }
365 365 return (rc);
366 366 }
367 367
368 368 static void
369 369 zfs_log_history(zfs_cmd_t *zc)
370 370 {
371 371 spa_t *spa;
372 372 char *buf;
373 373
374 374 if ((buf = history_str_get(zc)) == NULL)
375 375 return;
376 376
377 377 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
378 378 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
379 379 (void) spa_history_log(spa, buf);
380 380 spa_close(spa, FTAG);
381 381 }
382 382 history_str_free(buf);
383 383 }
384 384
385 385 /*
386 386 * Policy for top-level read operations (list pools). Requires no privileges,
387 387 * and can be used in the local zone, as there is no associated dataset.
388 388 */
389 389 /* ARGSUSED */
390 390 static int
391 391 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
392 392 {
393 393 return (0);
394 394 }
395 395
396 396 /*
397 397 * Policy for dataset read operations (list children, get statistics). Requires
398 398 * no privileges, but must be visible in the local zone.
399 399 */
400 400 /* ARGSUSED */
401 401 static int
402 402 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
403 403 {
404 404 if (INGLOBALZONE(curproc) ||
405 405 zone_dataset_visible(zc->zc_name, NULL))
406 406 return (0);
407 407
408 408 return (SET_ERROR(ENOENT));
409 409 }
410 410
411 411 static int
412 412 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
413 413 {
414 414 int writable = 1;
415 415
416 416 /*
417 417 * The dataset must be visible by this zone -- check this first
418 418 * so they don't see EPERM on something they shouldn't know about.
419 419 */
420 420 if (!INGLOBALZONE(curproc) &&
421 421 !zone_dataset_visible(dataset, &writable))
422 422 return (SET_ERROR(ENOENT));
423 423
424 424 if (INGLOBALZONE(curproc)) {
425 425 /*
426 426 * If the fs is zoned, only root can access it from the
427 427 * global zone.
428 428 */
429 429 if (secpolicy_zfs(cr) && zoned)
430 430 return (SET_ERROR(EPERM));
431 431 } else {
432 432 /*
433 433 * If we are in a local zone, the 'zoned' property must be set.
434 434 */
435 435 if (!zoned)
436 436 return (SET_ERROR(EPERM));
437 437
438 438 /* must be writable by this zone */
439 439 if (!writable)
440 440 return (SET_ERROR(EPERM));
441 441 }
442 442 return (0);
443 443 }
444 444
445 445 static int
446 446 zfs_dozonecheck(const char *dataset, cred_t *cr)
447 447 {
448 448 uint64_t zoned;
449 449
450 450 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
451 451 return (SET_ERROR(ENOENT));
452 452
453 453 return (zfs_dozonecheck_impl(dataset, zoned, cr));
454 454 }
455 455
456 456 static int
457 457 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
458 458 {
459 459 uint64_t zoned;
460 460
461 461 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
462 462 return (SET_ERROR(ENOENT));
463 463
464 464 return (zfs_dozonecheck_impl(dataset, zoned, cr));
465 465 }
466 466
467 467 static int
468 468 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
469 469 const char *perm, cred_t *cr)
470 470 {
471 471 int error;
472 472
473 473 error = zfs_dozonecheck_ds(name, ds, cr);
474 474 if (error == 0) {
475 475 error = secpolicy_zfs(cr);
476 476 if (error != 0)
477 477 error = dsl_deleg_access_impl(ds, perm, cr);
478 478 }
479 479 return (error);
480 480 }
481 481
482 482 static int
483 483 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
484 484 {
485 485 int error;
486 486 dsl_dataset_t *ds;
487 487 dsl_pool_t *dp;
488 488
489 489 error = dsl_pool_hold(name, FTAG, &dp);
490 490 if (error != 0)
491 491 return (error);
492 492
493 493 error = dsl_dataset_hold(dp, name, FTAG, &ds);
494 494 if (error != 0) {
495 495 dsl_pool_rele(dp, FTAG);
496 496 return (error);
497 497 }
498 498
499 499 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
500 500
501 501 dsl_dataset_rele(ds, FTAG);
502 502 dsl_pool_rele(dp, FTAG);
503 503 return (error);
504 504 }
505 505
506 506 /*
507 507 * Policy for setting the security label property.
508 508 *
509 509 * Returns 0 for success, non-zero for access and other errors.
510 510 */
511 511 static int
512 512 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
513 513 {
514 514 char ds_hexsl[MAXNAMELEN];
515 515 bslabel_t ds_sl, new_sl;
516 516 boolean_t new_default = FALSE;
517 517 uint64_t zoned;
518 518 int needed_priv = -1;
519 519 int error;
520 520
521 521 /* First get the existing dataset label. */
522 522 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
523 523 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
524 524 if (error != 0)
525 525 return (SET_ERROR(EPERM));
526 526
527 527 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
528 528 new_default = TRUE;
529 529
530 530 /* The label must be translatable */
531 531 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
532 532 return (SET_ERROR(EINVAL));
533 533
534 534 /*
535 535 * In a non-global zone, disallow attempts to set a label that
536 536 * doesn't match that of the zone; otherwise no other checks
537 537 * are needed.
538 538 */
539 539 if (!INGLOBALZONE(curproc)) {
540 540 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
541 541 return (SET_ERROR(EPERM));
542 542 return (0);
543 543 }
544 544
545 545 /*
546 546 * For global-zone datasets (i.e., those whose zoned property is
547 547 * "off", verify that the specified new label is valid for the
548 548 * global zone.
549 549 */
550 550 if (dsl_prop_get_integer(name,
551 551 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
552 552 return (SET_ERROR(EPERM));
553 553 if (!zoned) {
554 554 if (zfs_check_global_label(name, strval) != 0)
555 555 return (SET_ERROR(EPERM));
556 556 }
557 557
558 558 /*
559 559 * If the existing dataset label is nondefault, check if the
560 560 * dataset is mounted (label cannot be changed while mounted).
561 561 * Get the zfsvfs; if there isn't one, then the dataset isn't
562 562 * mounted (or isn't a dataset, doesn't exist, ...).
563 563 */
564 564 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
565 565 objset_t *os;
566 566 static char *setsl_tag = "setsl_tag";
567 567
568 568 /*
569 569 * Try to own the dataset; abort if there is any error,
570 570 * (e.g., already mounted, in use, or other error).
571 571 */
572 572 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
573 573 setsl_tag, &os);
574 574 if (error != 0)
575 575 return (SET_ERROR(EPERM));
576 576
577 577 dmu_objset_disown(os, setsl_tag);
578 578
579 579 if (new_default) {
580 580 needed_priv = PRIV_FILE_DOWNGRADE_SL;
581 581 goto out_check;
582 582 }
583 583
584 584 if (hexstr_to_label(strval, &new_sl) != 0)
585 585 return (SET_ERROR(EPERM));
586 586
587 587 if (blstrictdom(&ds_sl, &new_sl))
588 588 needed_priv = PRIV_FILE_DOWNGRADE_SL;
589 589 else if (blstrictdom(&new_sl, &ds_sl))
590 590 needed_priv = PRIV_FILE_UPGRADE_SL;
591 591 } else {
592 592 /* dataset currently has a default label */
593 593 if (!new_default)
594 594 needed_priv = PRIV_FILE_UPGRADE_SL;
595 595 }
596 596
597 597 out_check:
598 598 if (needed_priv != -1)
599 599 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
600 600 return (0);
601 601 }
602 602
603 603 static int
604 604 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
605 605 cred_t *cr)
606 606 {
607 607 char *strval;
608 608
609 609 /*
610 610 * Check permissions for special properties.
611 611 */
612 612 switch (prop) {
613 613 case ZFS_PROP_ZONED:
614 614 /*
615 615 * Disallow setting of 'zoned' from within a local zone.
616 616 */
617 617 if (!INGLOBALZONE(curproc))
618 618 return (SET_ERROR(EPERM));
619 619 break;
620 620
621 621 case ZFS_PROP_QUOTA:
622 622 if (!INGLOBALZONE(curproc)) {
623 623 uint64_t zoned;
624 624 char setpoint[MAXNAMELEN];
625 625 /*
626 626 * Unprivileged users are allowed to modify the
627 627 * quota on things *under* (ie. contained by)
628 628 * the thing they own.
629 629 */
630 630 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
631 631 setpoint))
632 632 return (SET_ERROR(EPERM));
633 633 if (!zoned || strlen(dsname) <= strlen(setpoint))
634 634 return (SET_ERROR(EPERM));
635 635 }
636 636 break;
637 637
638 638 case ZFS_PROP_MLSLABEL:
639 639 if (!is_system_labeled())
640 640 return (SET_ERROR(EPERM));
641 641
642 642 if (nvpair_value_string(propval, &strval) == 0) {
643 643 int err;
644 644
645 645 err = zfs_set_slabel_policy(dsname, strval, CRED());
646 646 if (err != 0)
647 647 return (err);
648 648 }
649 649 break;
650 650 }
651 651
652 652 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
653 653 }
654 654
655 655 /* ARGSUSED */
656 656 static int
657 657 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
658 658 {
659 659 int error;
660 660
661 661 error = zfs_dozonecheck(zc->zc_name, cr);
662 662 if (error != 0)
663 663 return (error);
664 664
665 665 /*
666 666 * permission to set permissions will be evaluated later in
667 667 * dsl_deleg_can_allow()
668 668 */
669 669 return (0);
670 670 }
671 671
672 672 /* ARGSUSED */
673 673 static int
674 674 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
675 675 {
676 676 return (zfs_secpolicy_write_perms(zc->zc_name,
677 677 ZFS_DELEG_PERM_ROLLBACK, cr));
678 678 }
679 679
680 680 /* ARGSUSED */
681 681 static int
682 682 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
683 683 {
684 684 dsl_pool_t *dp;
685 685 dsl_dataset_t *ds;
686 686 char *cp;
687 687 int error;
688 688
689 689 /*
690 690 * Generate the current snapshot name from the given objsetid, then
691 691 * use that name for the secpolicy/zone checks.
692 692 */
693 693 cp = strchr(zc->zc_name, '@');
694 694 if (cp == NULL)
695 695 return (SET_ERROR(EINVAL));
696 696 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
697 697 if (error != 0)
698 698 return (error);
699 699
700 700 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
701 701 if (error != 0) {
702 702 dsl_pool_rele(dp, FTAG);
703 703 return (error);
704 704 }
705 705
706 706 dsl_dataset_name(ds, zc->zc_name);
707 707
708 708 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
709 709 ZFS_DELEG_PERM_SEND, cr);
710 710 dsl_dataset_rele(ds, FTAG);
711 711 dsl_pool_rele(dp, FTAG);
712 712
713 713 return (error);
714 714 }
715 715
716 716 /* ARGSUSED */
717 717 static int
718 718 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
719 719 {
720 720 return (zfs_secpolicy_write_perms(zc->zc_name,
721 721 ZFS_DELEG_PERM_SEND, cr));
722 722 }
723 723
724 724 /* ARGSUSED */
725 725 static int
726 726 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
727 727 {
728 728 vnode_t *vp;
729 729 int error;
730 730
731 731 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
732 732 NO_FOLLOW, NULL, &vp)) != 0)
733 733 return (error);
734 734
735 735 /* Now make sure mntpnt and dataset are ZFS */
736 736
737 737 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
738 738 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
739 739 zc->zc_name) != 0)) {
740 740 VN_RELE(vp);
741 741 return (SET_ERROR(EPERM));
742 742 }
743 743
744 744 VN_RELE(vp);
745 745 return (dsl_deleg_access(zc->zc_name,
746 746 ZFS_DELEG_PERM_SHARE, cr));
747 747 }
748 748
749 749 int
750 750 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
751 751 {
752 752 if (!INGLOBALZONE(curproc))
753 753 return (SET_ERROR(EPERM));
754 754
755 755 if (secpolicy_nfs(cr) == 0) {
756 756 return (0);
757 757 } else {
758 758 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
759 759 }
760 760 }
761 761
762 762 int
763 763 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
764 764 {
765 765 if (!INGLOBALZONE(curproc))
766 766 return (SET_ERROR(EPERM));
767 767
768 768 if (secpolicy_smb(cr) == 0) {
769 769 return (0);
770 770 } else {
771 771 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
772 772 }
773 773 }
774 774
775 775 static int
776 776 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
777 777 {
778 778 char *cp;
779 779
780 780 /*
781 781 * Remove the @bla or /bla from the end of the name to get the parent.
782 782 */
783 783 (void) strncpy(parent, datasetname, parentsize);
784 784 cp = strrchr(parent, '@');
785 785 if (cp != NULL) {
786 786 cp[0] = '\0';
787 787 } else {
788 788 cp = strrchr(parent, '/');
789 789 if (cp == NULL)
790 790 return (SET_ERROR(ENOENT));
791 791 cp[0] = '\0';
792 792 }
793 793
794 794 return (0);
795 795 }
796 796
797 797 int
798 798 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
799 799 {
800 800 int error;
801 801
802 802 if ((error = zfs_secpolicy_write_perms(name,
803 803 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
804 804 return (error);
805 805
806 806 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
807 807 }
808 808
809 809 /* ARGSUSED */
810 810 static int
811 811 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
812 812 {
813 813 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
814 814 }
815 815
816 816 /*
817 817 * Destroying snapshots with delegated permissions requires
818 818 * descendant mount and destroy permissions.
819 819 */
820 820 /* ARGSUSED */
821 821 static int
822 822 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
823 823 {
824 824 nvlist_t *snaps;
825 825 nvpair_t *pair, *nextpair;
826 826 int error = 0;
827 827
828 828 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
829 829 return (SET_ERROR(EINVAL));
830 830 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
831 831 pair = nextpair) {
832 832 dsl_pool_t *dp;
833 833 dsl_dataset_t *ds;
834 834
835 835 error = dsl_pool_hold(nvpair_name(pair), FTAG, &dp);
836 836 if (error != 0)
837 837 break;
838 838 nextpair = nvlist_next_nvpair(snaps, pair);
839 839 error = dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds);
840 840 if (error == 0)
841 841 dsl_dataset_rele(ds, FTAG);
842 842 dsl_pool_rele(dp, FTAG);
843 843
844 844 if (error == 0) {
845 845 error = zfs_secpolicy_destroy_perms(nvpair_name(pair),
846 846 cr);
847 847 } else if (error == ENOENT) {
848 848 /*
849 849 * Ignore any snapshots that don't exist (we consider
850 850 * them "already destroyed"). Remove the name from the
851 851 * nvl here in case the snapshot is created between
852 852 * now and when we try to destroy it (in which case
853 853 * we don't want to destroy it since we haven't
854 854 * checked for permission).
855 855 */
856 856 fnvlist_remove_nvpair(snaps, pair);
857 857 error = 0;
858 858 }
859 859 if (error != 0)
860 860 break;
861 861 }
862 862
863 863 return (error);
864 864 }
865 865
866 866 int
867 867 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
868 868 {
869 869 char parentname[MAXNAMELEN];
870 870 int error;
871 871
872 872 if ((error = zfs_secpolicy_write_perms(from,
873 873 ZFS_DELEG_PERM_RENAME, cr)) != 0)
874 874 return (error);
875 875
876 876 if ((error = zfs_secpolicy_write_perms(from,
877 877 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
878 878 return (error);
879 879
880 880 if ((error = zfs_get_parent(to, parentname,
881 881 sizeof (parentname))) != 0)
882 882 return (error);
883 883
884 884 if ((error = zfs_secpolicy_write_perms(parentname,
885 885 ZFS_DELEG_PERM_CREATE, cr)) != 0)
886 886 return (error);
887 887
888 888 if ((error = zfs_secpolicy_write_perms(parentname,
889 889 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
890 890 return (error);
891 891
892 892 return (error);
893 893 }
894 894
895 895 /* ARGSUSED */
896 896 static int
897 897 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
898 898 {
899 899 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
900 900 }
901 901
902 902 /* ARGSUSED */
903 903 static int
904 904 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
905 905 {
906 906 dsl_pool_t *dp;
907 907 dsl_dataset_t *clone;
908 908 int error;
909 909
910 910 error = zfs_secpolicy_write_perms(zc->zc_name,
911 911 ZFS_DELEG_PERM_PROMOTE, cr);
912 912 if (error != 0)
913 913 return (error);
914 914
915 915 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
916 916 if (error != 0)
917 917 return (error);
918 918
919 919 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
920 920
921 921 if (error == 0) {
922 922 char parentname[MAXNAMELEN];
923 923 dsl_dataset_t *origin = NULL;
924 924 dsl_dir_t *dd;
925 925 dd = clone->ds_dir;
926 926
927 927 error = dsl_dataset_hold_obj(dd->dd_pool,
928 928 dd->dd_phys->dd_origin_obj, FTAG, &origin);
929 929 if (error != 0) {
930 930 dsl_dataset_rele(clone, FTAG);
931 931 dsl_pool_rele(dp, FTAG);
932 932 return (error);
933 933 }
934 934
935 935 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
936 936 ZFS_DELEG_PERM_MOUNT, cr);
937 937
938 938 dsl_dataset_name(origin, parentname);
939 939 if (error == 0) {
940 940 error = zfs_secpolicy_write_perms_ds(parentname, origin,
941 941 ZFS_DELEG_PERM_PROMOTE, cr);
942 942 }
943 943 dsl_dataset_rele(clone, FTAG);
944 944 dsl_dataset_rele(origin, FTAG);
945 945 }
946 946 dsl_pool_rele(dp, FTAG);
947 947 return (error);
948 948 }
949 949
950 950 /* ARGSUSED */
951 951 static int
952 952 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
953 953 {
954 954 int error;
955 955
956 956 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
957 957 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
958 958 return (error);
959 959
960 960 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
961 961 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
962 962 return (error);
963 963
964 964 return (zfs_secpolicy_write_perms(zc->zc_name,
965 965 ZFS_DELEG_PERM_CREATE, cr));
966 966 }
967 967
968 968 int
969 969 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
970 970 {
971 971 return (zfs_secpolicy_write_perms(name,
972 972 ZFS_DELEG_PERM_SNAPSHOT, cr));
973 973 }
974 974
975 975 /*
976 976 * Check for permission to create each snapshot in the nvlist.
977 977 */
978 978 /* ARGSUSED */
979 979 static int
980 980 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
981 981 {
982 982 nvlist_t *snaps;
983 983 int error = 0;
984 984 nvpair_t *pair;
985 985
986 986 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
987 987 return (SET_ERROR(EINVAL));
988 988 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
989 989 pair = nvlist_next_nvpair(snaps, pair)) {
990 990 char *name = nvpair_name(pair);
991 991 char *atp = strchr(name, '@');
992 992
993 993 if (atp == NULL) {
994 994 error = SET_ERROR(EINVAL);
995 995 break;
996 996 }
997 997 *atp = '\0';
998 998 error = zfs_secpolicy_snapshot_perms(name, cr);
999 999 *atp = '@';
1000 1000 if (error != 0)
1001 1001 break;
1002 1002 }
1003 1003 return (error);
1004 1004 }
1005 1005
1006 1006 /* ARGSUSED */
1007 1007 static int
1008 1008 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1009 1009 {
1010 1010 /*
1011 1011 * Even root must have a proper TSD so that we know what pool
1012 1012 * to log to.
1013 1013 */
1014 1014 if (tsd_get(zfs_allow_log_key) == NULL)
1015 1015 return (SET_ERROR(EPERM));
1016 1016 return (0);
1017 1017 }
1018 1018
1019 1019 static int
1020 1020 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1021 1021 {
1022 1022 char parentname[MAXNAMELEN];
1023 1023 int error;
1024 1024 char *origin;
1025 1025
1026 1026 if ((error = zfs_get_parent(zc->zc_name, parentname,
1027 1027 sizeof (parentname))) != 0)
1028 1028 return (error);
1029 1029
1030 1030 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1031 1031 (error = zfs_secpolicy_write_perms(origin,
1032 1032 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1033 1033 return (error);
1034 1034
1035 1035 if ((error = zfs_secpolicy_write_perms(parentname,
1036 1036 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1037 1037 return (error);
1038 1038
1039 1039 return (zfs_secpolicy_write_perms(parentname,
1040 1040 ZFS_DELEG_PERM_MOUNT, cr));
1041 1041 }
1042 1042
1043 1043 /*
1044 1044 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1045 1045 * SYS_CONFIG privilege, which is not available in a local zone.
1046 1046 */
1047 1047 /* ARGSUSED */
1048 1048 static int
1049 1049 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1050 1050 {
1051 1051 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1052 1052 return (SET_ERROR(EPERM));
1053 1053
1054 1054 return (0);
1055 1055 }
1056 1056
1057 1057 /*
1058 1058 * Policy for object to name lookups.
1059 1059 */
1060 1060 /* ARGSUSED */
1061 1061 static int
1062 1062 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1063 1063 {
1064 1064 int error;
1065 1065
1066 1066 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1067 1067 return (0);
1068 1068
1069 1069 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1070 1070 return (error);
1071 1071 }
1072 1072
1073 1073 /*
1074 1074 * Policy for fault injection. Requires all privileges.
1075 1075 */
1076 1076 /* ARGSUSED */
1077 1077 static int
1078 1078 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1079 1079 {
1080 1080 return (secpolicy_zinject(cr));
1081 1081 }
1082 1082
1083 1083 /* ARGSUSED */
1084 1084 static int
1085 1085 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1086 1086 {
1087 1087 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1088 1088
1089 1089 if (prop == ZPROP_INVAL) {
1090 1090 if (!zfs_prop_user(zc->zc_value))
1091 1091 return (SET_ERROR(EINVAL));
1092 1092 return (zfs_secpolicy_write_perms(zc->zc_name,
1093 1093 ZFS_DELEG_PERM_USERPROP, cr));
1094 1094 } else {
1095 1095 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1096 1096 NULL, cr));
1097 1097 }
1098 1098 }
1099 1099
1100 1100 static int
1101 1101 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1102 1102 {
1103 1103 int err = zfs_secpolicy_read(zc, innvl, cr);
1104 1104 if (err)
1105 1105 return (err);
1106 1106
1107 1107 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1108 1108 return (SET_ERROR(EINVAL));
1109 1109
1110 1110 if (zc->zc_value[0] == 0) {
1111 1111 /*
1112 1112 * They are asking about a posix uid/gid. If it's
1113 1113 * themself, allow it.
1114 1114 */
1115 1115 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1116 1116 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1117 1117 if (zc->zc_guid == crgetuid(cr))
1118 1118 return (0);
1119 1119 } else {
1120 1120 if (groupmember(zc->zc_guid, cr))
1121 1121 return (0);
1122 1122 }
1123 1123 }
1124 1124
1125 1125 return (zfs_secpolicy_write_perms(zc->zc_name,
1126 1126 userquota_perms[zc->zc_objset_type], cr));
1127 1127 }
1128 1128
1129 1129 static int
1130 1130 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1131 1131 {
1132 1132 int err = zfs_secpolicy_read(zc, innvl, cr);
1133 1133 if (err)
1134 1134 return (err);
1135 1135
1136 1136 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1137 1137 return (SET_ERROR(EINVAL));
1138 1138
1139 1139 return (zfs_secpolicy_write_perms(zc->zc_name,
1140 1140 userquota_perms[zc->zc_objset_type], cr));
1141 1141 }
1142 1142
1143 1143 /* ARGSUSED */
1144 1144 static int
1145 1145 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 1146 {
1147 1147 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1148 1148 NULL, cr));
1149 1149 }
1150 1150
1151 1151 /* ARGSUSED */
1152 1152 static int
1153 1153 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1154 1154 {
1155 1155 nvpair_t *pair;
1156 1156 nvlist_t *holds;
1157 1157 int error;
1158 1158
1159 1159 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1160 1160 if (error != 0)
1161 1161 return (SET_ERROR(EINVAL));
1162 1162
1163 1163 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1164 1164 pair = nvlist_next_nvpair(holds, pair)) {
1165 1165 char fsname[MAXNAMELEN];
1166 1166 error = dmu_fsname(nvpair_name(pair), fsname);
1167 1167 if (error != 0)
1168 1168 return (error);
1169 1169 error = zfs_secpolicy_write_perms(fsname,
1170 1170 ZFS_DELEG_PERM_HOLD, cr);
1171 1171 if (error != 0)
1172 1172 return (error);
1173 1173 }
1174 1174 return (0);
1175 1175 }
1176 1176
1177 1177 /* ARGSUSED */
1178 1178 static int
1179 1179 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1180 1180 {
1181 1181 nvpair_t *pair;
1182 1182 int error;
1183 1183
1184 1184 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1185 1185 pair = nvlist_next_nvpair(innvl, pair)) {
1186 1186 char fsname[MAXNAMELEN];
1187 1187 error = dmu_fsname(nvpair_name(pair), fsname);
1188 1188 if (error != 0)
1189 1189 return (error);
1190 1190 error = zfs_secpolicy_write_perms(fsname,
1191 1191 ZFS_DELEG_PERM_RELEASE, cr);
1192 1192 if (error != 0)
1193 1193 return (error);
1194 1194 }
1195 1195 return (0);
1196 1196 }
1197 1197
1198 1198 /*
1199 1199 * Policy for allowing temporary snapshots to be taken or released
1200 1200 */
1201 1201 static int
1202 1202 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1203 1203 {
1204 1204 /*
1205 1205 * A temporary snapshot is the same as a snapshot,
1206 1206 * hold, destroy and release all rolled into one.
1207 1207 * Delegated diff alone is sufficient that we allow this.
1208 1208 */
1209 1209 int error;
1210 1210
1211 1211 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1212 1212 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1213 1213 return (0);
1214 1214
1215 1215 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1216 1216 if (error == 0)
1217 1217 error = zfs_secpolicy_hold(zc, innvl, cr);
1218 1218 if (error == 0)
1219 1219 error = zfs_secpolicy_release(zc, innvl, cr);
1220 1220 if (error == 0)
1221 1221 error = zfs_secpolicy_destroy(zc, innvl, cr);
1222 1222 return (error);
1223 1223 }
1224 1224
1225 1225 /*
1226 1226 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1227 1227 */
1228 1228 static int
1229 1229 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1230 1230 {
1231 1231 char *packed;
1232 1232 int error;
1233 1233 nvlist_t *list = NULL;
1234 1234
1235 1235 /*
1236 1236 * Read in and unpack the user-supplied nvlist.
1237 1237 */
1238 1238 if (size == 0)
1239 1239 return (SET_ERROR(EINVAL));
1240 1240
1241 1241 packed = kmem_alloc(size, KM_SLEEP);
1242 1242
1243 1243 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1244 1244 iflag)) != 0) {
1245 1245 kmem_free(packed, size);
1246 1246 return (error);
1247 1247 }
1248 1248
1249 1249 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1250 1250 kmem_free(packed, size);
1251 1251 return (error);
1252 1252 }
1253 1253
1254 1254 kmem_free(packed, size);
1255 1255
1256 1256 *nvp = list;
1257 1257 return (0);
1258 1258 }
1259 1259
1260 1260 /*
1261 1261 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1262 1262 * Entries will be removed from the end of the nvlist, and one int32 entry
1263 1263 * named "N_MORE_ERRORS" will be added indicating how many entries were
1264 1264 * removed.
1265 1265 */
1266 1266 static int
1267 1267 nvlist_smush(nvlist_t *errors, size_t max)
1268 1268 {
1269 1269 size_t size;
1270 1270
1271 1271 size = fnvlist_size(errors);
1272 1272
1273 1273 if (size > max) {
1274 1274 nvpair_t *more_errors;
1275 1275 int n = 0;
1276 1276
1277 1277 if (max < 1024)
1278 1278 return (SET_ERROR(ENOMEM));
1279 1279
1280 1280 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1281 1281 more_errors = nvlist_prev_nvpair(errors, NULL);
1282 1282
1283 1283 do {
1284 1284 nvpair_t *pair = nvlist_prev_nvpair(errors,
1285 1285 more_errors);
1286 1286 fnvlist_remove_nvpair(errors, pair);
1287 1287 n++;
1288 1288 size = fnvlist_size(errors);
1289 1289 } while (size > max);
1290 1290
1291 1291 fnvlist_remove_nvpair(errors, more_errors);
1292 1292 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1293 1293 ASSERT3U(fnvlist_size(errors), <=, max);
1294 1294 }
1295 1295
1296 1296 return (0);
1297 1297 }
1298 1298
1299 1299 static int
1300 1300 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1301 1301 {
1302 1302 char *packed = NULL;
1303 1303 int error = 0;
1304 1304 size_t size;
1305 1305
1306 1306 size = fnvlist_size(nvl);
1307 1307
1308 1308 if (size > zc->zc_nvlist_dst_size) {
1309 1309 error = SET_ERROR(ENOMEM);
1310 1310 } else {
1311 1311 packed = fnvlist_pack(nvl, &size);
1312 1312 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1313 1313 size, zc->zc_iflags) != 0)
1314 1314 error = SET_ERROR(EFAULT);
1315 1315 fnvlist_pack_free(packed, size);
1316 1316 }
1317 1317
1318 1318 zc->zc_nvlist_dst_size = size;
1319 1319 zc->zc_nvlist_dst_filled = B_TRUE;
1320 1320 return (error);
1321 1321 }
1322 1322
1323 1323 static int
1324 1324 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1325 1325 {
1326 1326 objset_t *os;
1327 1327 int error;
1328 1328
1329 1329 error = dmu_objset_hold(dsname, FTAG, &os);
1330 1330 if (error != 0)
1331 1331 return (error);
1332 1332 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1333 1333 dmu_objset_rele(os, FTAG);
1334 1334 return (SET_ERROR(EINVAL));
1335 1335 }
1336 1336
1337 1337 mutex_enter(&os->os_user_ptr_lock);
1338 1338 *zfvp = dmu_objset_get_user(os);
1339 1339 if (*zfvp) {
1340 1340 VFS_HOLD((*zfvp)->z_vfs);
1341 1341 } else {
1342 1342 error = SET_ERROR(ESRCH);
1343 1343 }
1344 1344 mutex_exit(&os->os_user_ptr_lock);
1345 1345 dmu_objset_rele(os, FTAG);
1346 1346 return (error);
1347 1347 }
1348 1348
1349 1349 /*
1350 1350 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1351 1351 * case its z_vfs will be NULL, and it will be opened as the owner.
1352 1352 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1353 1353 * which prevents all vnode ops from running.
1354 1354 */
1355 1355 static int
1356 1356 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1357 1357 {
1358 1358 int error = 0;
1359 1359
1360 1360 if (getzfsvfs(name, zfvp) != 0)
1361 1361 error = zfsvfs_create(name, zfvp);
1362 1362 if (error == 0) {
1363 1363 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1364 1364 RW_READER, tag);
1365 1365 if ((*zfvp)->z_unmounted) {
1366 1366 /*
1367 1367 * XXX we could probably try again, since the unmounting
1368 1368 * thread should be just about to disassociate the
1369 1369 * objset from the zfsvfs.
1370 1370 */
1371 1371 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1372 1372 return (SET_ERROR(EBUSY));
1373 1373 }
1374 1374 }
1375 1375 return (error);
1376 1376 }
1377 1377
1378 1378 static void
1379 1379 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1380 1380 {
1381 1381 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1382 1382
1383 1383 if (zfsvfs->z_vfs) {
1384 1384 VFS_RELE(zfsvfs->z_vfs);
1385 1385 } else {
1386 1386 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1387 1387 zfsvfs_free(zfsvfs);
1388 1388 }
1389 1389 }
1390 1390
1391 1391 static int
1392 1392 zfs_ioc_pool_create(zfs_cmd_t *zc)
1393 1393 {
1394 1394 int error;
1395 1395 nvlist_t *config, *props = NULL;
1396 1396 nvlist_t *rootprops = NULL;
1397 1397 nvlist_t *zplprops = NULL;
1398 1398
1399 1399 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1400 1400 zc->zc_iflags, &config))
1401 1401 return (error);
1402 1402
1403 1403 if (zc->zc_nvlist_src_size != 0 && (error =
1404 1404 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1405 1405 zc->zc_iflags, &props))) {
1406 1406 nvlist_free(config);
1407 1407 return (error);
1408 1408 }
1409 1409
1410 1410 if (props) {
1411 1411 nvlist_t *nvl = NULL;
1412 1412 uint64_t version = SPA_VERSION;
1413 1413
1414 1414 (void) nvlist_lookup_uint64(props,
1415 1415 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1416 1416 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1417 1417 error = SET_ERROR(EINVAL);
1418 1418 goto pool_props_bad;
1419 1419 }
1420 1420 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1421 1421 if (nvl) {
1422 1422 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1423 1423 if (error != 0) {
1424 1424 nvlist_free(config);
1425 1425 nvlist_free(props);
1426 1426 return (error);
1427 1427 }
1428 1428 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1429 1429 }
1430 1430 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1431 1431 error = zfs_fill_zplprops_root(version, rootprops,
1432 1432 zplprops, NULL);
1433 1433 if (error != 0)
1434 1434 goto pool_props_bad;
1435 1435 }
1436 1436
1437 1437 error = spa_create(zc->zc_name, config, props, zplprops);
1438 1438
1439 1439 /*
1440 1440 * Set the remaining root properties
1441 1441 */
1442 1442 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1443 1443 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1444 1444 (void) spa_destroy(zc->zc_name);
1445 1445
1446 1446 pool_props_bad:
1447 1447 nvlist_free(rootprops);
1448 1448 nvlist_free(zplprops);
1449 1449 nvlist_free(config);
1450 1450 nvlist_free(props);
1451 1451
1452 1452 return (error);
1453 1453 }
1454 1454
1455 1455 static int
1456 1456 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1457 1457 {
1458 1458 int error;
1459 1459 zfs_log_history(zc);
1460 1460 error = spa_destroy(zc->zc_name);
1461 1461 if (error == 0)
1462 1462 zvol_remove_minors(zc->zc_name);
1463 1463 return (error);
1464 1464 }
1465 1465
1466 1466 static int
1467 1467 zfs_ioc_pool_import(zfs_cmd_t *zc)
1468 1468 {
1469 1469 nvlist_t *config, *props = NULL;
1470 1470 uint64_t guid;
1471 1471 int error;
1472 1472
1473 1473 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1474 1474 zc->zc_iflags, &config)) != 0)
1475 1475 return (error);
1476 1476
1477 1477 if (zc->zc_nvlist_src_size != 0 && (error =
1478 1478 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1479 1479 zc->zc_iflags, &props))) {
1480 1480 nvlist_free(config);
1481 1481 return (error);
1482 1482 }
1483 1483
1484 1484 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1485 1485 guid != zc->zc_guid)
1486 1486 error = SET_ERROR(EINVAL);
1487 1487 else
1488 1488 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1489 1489
1490 1490 if (zc->zc_nvlist_dst != 0) {
1491 1491 int err;
1492 1492
1493 1493 if ((err = put_nvlist(zc, config)) != 0)
1494 1494 error = err;
1495 1495 }
1496 1496
1497 1497 nvlist_free(config);
1498 1498
1499 1499 if (props)
1500 1500 nvlist_free(props);
1501 1501
1502 1502 return (error);
1503 1503 }
1504 1504
1505 1505 static int
1506 1506 zfs_ioc_pool_export(zfs_cmd_t *zc)
1507 1507 {
1508 1508 int error;
1509 1509 boolean_t force = (boolean_t)zc->zc_cookie;
1510 1510 boolean_t hardforce = (boolean_t)zc->zc_guid;
1511 1511
1512 1512 zfs_log_history(zc);
1513 1513 error = spa_export(zc->zc_name, NULL, force, hardforce);
1514 1514 if (error == 0)
1515 1515 zvol_remove_minors(zc->zc_name);
1516 1516 return (error);
1517 1517 }
1518 1518
1519 1519 static int
1520 1520 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1521 1521 {
1522 1522 nvlist_t *configs;
1523 1523 int error;
1524 1524
1525 1525 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1526 1526 return (SET_ERROR(EEXIST));
1527 1527
1528 1528 error = put_nvlist(zc, configs);
1529 1529
1530 1530 nvlist_free(configs);
1531 1531
1532 1532 return (error);
1533 1533 }
1534 1534
1535 1535 /*
1536 1536 * inputs:
1537 1537 * zc_name name of the pool
1538 1538 *
1539 1539 * outputs:
1540 1540 * zc_cookie real errno
1541 1541 * zc_nvlist_dst config nvlist
1542 1542 * zc_nvlist_dst_size size of config nvlist
1543 1543 */
1544 1544 static int
1545 1545 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1546 1546 {
1547 1547 nvlist_t *config;
1548 1548 int error;
1549 1549 int ret = 0;
1550 1550
1551 1551 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1552 1552 sizeof (zc->zc_value));
1553 1553
1554 1554 if (config != NULL) {
1555 1555 ret = put_nvlist(zc, config);
1556 1556 nvlist_free(config);
1557 1557
1558 1558 /*
1559 1559 * The config may be present even if 'error' is non-zero.
1560 1560 * In this case we return success, and preserve the real errno
1561 1561 * in 'zc_cookie'.
1562 1562 */
1563 1563 zc->zc_cookie = error;
1564 1564 } else {
1565 1565 ret = error;
1566 1566 }
1567 1567
1568 1568 return (ret);
1569 1569 }
1570 1570
1571 1571 /*
1572 1572 * Try to import the given pool, returning pool stats as appropriate so that
1573 1573 * user land knows which devices are available and overall pool health.
1574 1574 */
1575 1575 static int
1576 1576 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1577 1577 {
1578 1578 nvlist_t *tryconfig, *config;
1579 1579 int error;
1580 1580
1581 1581 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1582 1582 zc->zc_iflags, &tryconfig)) != 0)
1583 1583 return (error);
1584 1584
1585 1585 config = spa_tryimport(tryconfig);
1586 1586
1587 1587 nvlist_free(tryconfig);
1588 1588
1589 1589 if (config == NULL)
1590 1590 return (SET_ERROR(EINVAL));
1591 1591
1592 1592 error = put_nvlist(zc, config);
1593 1593 nvlist_free(config);
1594 1594
1595 1595 return (error);
1596 1596 }
1597 1597
1598 1598 /*
1599 1599 * inputs:
1600 1600 * zc_name name of the pool
1601 1601 * zc_cookie scan func (pool_scan_func_t)
1602 1602 */
1603 1603 static int
1604 1604 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1605 1605 {
1606 1606 spa_t *spa;
1607 1607 int error;
1608 1608
1609 1609 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1610 1610 return (error);
1611 1611
1612 1612 if (zc->zc_cookie == POOL_SCAN_NONE)
1613 1613 error = spa_scan_stop(spa);
1614 1614 else
1615 1615 error = spa_scan(spa, zc->zc_cookie);
1616 1616
1617 1617 spa_close(spa, FTAG);
1618 1618
1619 1619 return (error);
1620 1620 }
1621 1621
1622 1622 static int
1623 1623 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1624 1624 {
1625 1625 spa_t *spa;
1626 1626 int error;
1627 1627
1628 1628 error = spa_open(zc->zc_name, &spa, FTAG);
1629 1629 if (error == 0) {
1630 1630 spa_freeze(spa);
1631 1631 spa_close(spa, FTAG);
1632 1632 }
1633 1633 return (error);
1634 1634 }
1635 1635
1636 1636 static int
1637 1637 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1638 1638 {
1639 1639 spa_t *spa;
1640 1640 int error;
1641 1641
1642 1642 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1643 1643 return (error);
1644 1644
1645 1645 if (zc->zc_cookie < spa_version(spa) ||
1646 1646 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1647 1647 spa_close(spa, FTAG);
1648 1648 return (SET_ERROR(EINVAL));
1649 1649 }
1650 1650
1651 1651 spa_upgrade(spa, zc->zc_cookie);
1652 1652 spa_close(spa, FTAG);
1653 1653
1654 1654 return (error);
1655 1655 }
1656 1656
1657 1657 static int
1658 1658 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1659 1659 {
1660 1660 spa_t *spa;
1661 1661 char *hist_buf;
1662 1662 uint64_t size;
1663 1663 int error;
1664 1664
1665 1665 if ((size = zc->zc_history_len) == 0)
1666 1666 return (SET_ERROR(EINVAL));
1667 1667
1668 1668 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1669 1669 return (error);
1670 1670
1671 1671 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1672 1672 spa_close(spa, FTAG);
1673 1673 return (SET_ERROR(ENOTSUP));
1674 1674 }
1675 1675
1676 1676 hist_buf = kmem_alloc(size, KM_SLEEP);
1677 1677 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1678 1678 &zc->zc_history_len, hist_buf)) == 0) {
1679 1679 error = ddi_copyout(hist_buf,
1680 1680 (void *)(uintptr_t)zc->zc_history,
1681 1681 zc->zc_history_len, zc->zc_iflags);
1682 1682 }
1683 1683
1684 1684 spa_close(spa, FTAG);
1685 1685 kmem_free(hist_buf, size);
1686 1686 return (error);
1687 1687 }
1688 1688
1689 1689 static int
1690 1690 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1691 1691 {
1692 1692 spa_t *spa;
1693 1693 int error;
1694 1694
1695 1695 error = spa_open(zc->zc_name, &spa, FTAG);
1696 1696 if (error == 0) {
1697 1697 error = spa_change_guid(spa);
1698 1698 spa_close(spa, FTAG);
1699 1699 }
1700 1700 return (error);
1701 1701 }
1702 1702
1703 1703 static int
1704 1704 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1705 1705 {
1706 1706 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1707 1707 }
1708 1708
1709 1709 /*
1710 1710 * inputs:
1711 1711 * zc_name name of filesystem
1712 1712 * zc_obj object to find
1713 1713 *
1714 1714 * outputs:
1715 1715 * zc_value name of object
1716 1716 */
1717 1717 static int
1718 1718 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1719 1719 {
1720 1720 objset_t *os;
1721 1721 int error;
1722 1722
1723 1723 /* XXX reading from objset not owned */
1724 1724 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1725 1725 return (error);
1726 1726 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1727 1727 dmu_objset_rele(os, FTAG);
1728 1728 return (SET_ERROR(EINVAL));
1729 1729 }
1730 1730 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1731 1731 sizeof (zc->zc_value));
1732 1732 dmu_objset_rele(os, FTAG);
1733 1733
1734 1734 return (error);
1735 1735 }
1736 1736
1737 1737 /*
1738 1738 * inputs:
1739 1739 * zc_name name of filesystem
1740 1740 * zc_obj object to find
1741 1741 *
1742 1742 * outputs:
1743 1743 * zc_stat stats on object
1744 1744 * zc_value path to object
1745 1745 */
1746 1746 static int
1747 1747 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1748 1748 {
1749 1749 objset_t *os;
1750 1750 int error;
1751 1751
1752 1752 /* XXX reading from objset not owned */
1753 1753 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1754 1754 return (error);
1755 1755 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1756 1756 dmu_objset_rele(os, FTAG);
1757 1757 return (SET_ERROR(EINVAL));
1758 1758 }
1759 1759 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1760 1760 sizeof (zc->zc_value));
1761 1761 dmu_objset_rele(os, FTAG);
1762 1762
1763 1763 return (error);
1764 1764 }
1765 1765
1766 1766 static int
1767 1767 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1768 1768 {
1769 1769 spa_t *spa;
1770 1770 int error;
1771 1771 nvlist_t *config, **l2cache, **spares;
1772 1772 uint_t nl2cache = 0, nspares = 0;
1773 1773
1774 1774 error = spa_open(zc->zc_name, &spa, FTAG);
1775 1775 if (error != 0)
1776 1776 return (error);
1777 1777
1778 1778 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1779 1779 zc->zc_iflags, &config);
1780 1780 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1781 1781 &l2cache, &nl2cache);
1782 1782
1783 1783 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1784 1784 &spares, &nspares);
1785 1785
1786 1786 /*
1787 1787 * A root pool with concatenated devices is not supported.
1788 1788 * Thus, can not add a device to a root pool.
1789 1789 *
1790 1790 * Intent log device can not be added to a rootpool because
1791 1791 * during mountroot, zil is replayed, a seperated log device
1792 1792 * can not be accessed during the mountroot time.
1793 1793 *
1794 1794 * l2cache and spare devices are ok to be added to a rootpool.
1795 1795 */
1796 1796 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1797 1797 nvlist_free(config);
1798 1798 spa_close(spa, FTAG);
1799 1799 return (SET_ERROR(EDOM));
1800 1800 }
1801 1801
1802 1802 if (error == 0) {
1803 1803 error = spa_vdev_add(spa, config);
1804 1804 nvlist_free(config);
1805 1805 }
1806 1806 spa_close(spa, FTAG);
1807 1807 return (error);
1808 1808 }
1809 1809
1810 1810 /*
1811 1811 * inputs:
1812 1812 * zc_name name of the pool
1813 1813 * zc_nvlist_conf nvlist of devices to remove
1814 1814 * zc_cookie to stop the remove?
1815 1815 */
1816 1816 static int
1817 1817 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1818 1818 {
1819 1819 spa_t *spa;
1820 1820 int error;
1821 1821
1822 1822 error = spa_open(zc->zc_name, &spa, FTAG);
1823 1823 if (error != 0)
1824 1824 return (error);
1825 1825 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1826 1826 spa_close(spa, FTAG);
1827 1827 return (error);
1828 1828 }
1829 1829
1830 1830 static int
1831 1831 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1832 1832 {
1833 1833 spa_t *spa;
1834 1834 int error;
1835 1835 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1836 1836
1837 1837 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1838 1838 return (error);
1839 1839 switch (zc->zc_cookie) {
1840 1840 case VDEV_STATE_ONLINE:
1841 1841 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1842 1842 break;
1843 1843
1844 1844 case VDEV_STATE_OFFLINE:
1845 1845 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1846 1846 break;
1847 1847
1848 1848 case VDEV_STATE_FAULTED:
1849 1849 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1850 1850 zc->zc_obj != VDEV_AUX_EXTERNAL)
1851 1851 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1852 1852
1853 1853 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1854 1854 break;
1855 1855
1856 1856 case VDEV_STATE_DEGRADED:
1857 1857 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1858 1858 zc->zc_obj != VDEV_AUX_EXTERNAL)
1859 1859 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1860 1860
1861 1861 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1862 1862 break;
1863 1863
1864 1864 default:
1865 1865 error = SET_ERROR(EINVAL);
1866 1866 }
1867 1867 zc->zc_cookie = newstate;
1868 1868 spa_close(spa, FTAG);
1869 1869 return (error);
1870 1870 }
1871 1871
1872 1872 static int
1873 1873 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1874 1874 {
1875 1875 spa_t *spa;
1876 1876 int replacing = zc->zc_cookie;
1877 1877 nvlist_t *config;
1878 1878 int error;
1879 1879
1880 1880 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1881 1881 return (error);
1882 1882
1883 1883 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1884 1884 zc->zc_iflags, &config)) == 0) {
1885 1885 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1886 1886 nvlist_free(config);
1887 1887 }
1888 1888
1889 1889 spa_close(spa, FTAG);
1890 1890 return (error);
1891 1891 }
1892 1892
1893 1893 static int
1894 1894 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1895 1895 {
1896 1896 spa_t *spa;
1897 1897 int error;
1898 1898
1899 1899 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1900 1900 return (error);
1901 1901
1902 1902 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1903 1903
1904 1904 spa_close(spa, FTAG);
1905 1905 return (error);
1906 1906 }
1907 1907
1908 1908 static int
1909 1909 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1910 1910 {
1911 1911 spa_t *spa;
1912 1912 nvlist_t *config, *props = NULL;
1913 1913 int error;
1914 1914 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1915 1915
1916 1916 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1917 1917 return (error);
1918 1918
1919 1919 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1920 1920 zc->zc_iflags, &config)) {
1921 1921 spa_close(spa, FTAG);
1922 1922 return (error);
1923 1923 }
1924 1924
1925 1925 if (zc->zc_nvlist_src_size != 0 && (error =
1926 1926 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1927 1927 zc->zc_iflags, &props))) {
1928 1928 spa_close(spa, FTAG);
1929 1929 nvlist_free(config);
1930 1930 return (error);
1931 1931 }
1932 1932
1933 1933 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1934 1934
1935 1935 spa_close(spa, FTAG);
1936 1936
1937 1937 nvlist_free(config);
1938 1938 nvlist_free(props);
1939 1939
1940 1940 return (error);
1941 1941 }
1942 1942
1943 1943 static int
1944 1944 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1945 1945 {
1946 1946 spa_t *spa;
1947 1947 char *path = zc->zc_value;
1948 1948 uint64_t guid = zc->zc_guid;
1949 1949 int error;
1950 1950
1951 1951 error = spa_open(zc->zc_name, &spa, FTAG);
1952 1952 if (error != 0)
1953 1953 return (error);
1954 1954
1955 1955 error = spa_vdev_setpath(spa, guid, path);
1956 1956 spa_close(spa, FTAG);
1957 1957 return (error);
1958 1958 }
1959 1959
1960 1960 static int
1961 1961 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1962 1962 {
1963 1963 spa_t *spa;
1964 1964 char *fru = zc->zc_value;
1965 1965 uint64_t guid = zc->zc_guid;
1966 1966 int error;
1967 1967
1968 1968 error = spa_open(zc->zc_name, &spa, FTAG);
1969 1969 if (error != 0)
1970 1970 return (error);
1971 1971
1972 1972 error = spa_vdev_setfru(spa, guid, fru);
1973 1973 spa_close(spa, FTAG);
1974 1974 return (error);
1975 1975 }
1976 1976
1977 1977 static int
1978 1978 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1979 1979 {
1980 1980 int error = 0;
1981 1981 nvlist_t *nv;
1982 1982
1983 1983 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1984 1984
1985 1985 if (zc->zc_nvlist_dst != 0 &&
1986 1986 (error = dsl_prop_get_all(os, &nv)) == 0) {
1987 1987 dmu_objset_stats(os, nv);
1988 1988 /*
1989 1989 * NB: zvol_get_stats() will read the objset contents,
1990 1990 * which we aren't supposed to do with a
1991 1991 * DS_MODE_USER hold, because it could be
1992 1992 * inconsistent. So this is a bit of a workaround...
1993 1993 * XXX reading with out owning
1994 1994 */
1995 1995 if (!zc->zc_objset_stats.dds_inconsistent &&
1996 1996 dmu_objset_type(os) == DMU_OST_ZVOL) {
1997 1997 error = zvol_get_stats(os, nv);
1998 1998 if (error == EIO)
1999 1999 return (error);
2000 2000 VERIFY0(error);
2001 2001 }
2002 2002 error = put_nvlist(zc, nv);
2003 2003 nvlist_free(nv);
2004 2004 }
2005 2005
2006 2006 return (error);
2007 2007 }
2008 2008
2009 2009 /*
2010 2010 * inputs:
2011 2011 * zc_name name of filesystem
2012 2012 * zc_nvlist_dst_size size of buffer for property nvlist
2013 2013 *
2014 2014 * outputs:
2015 2015 * zc_objset_stats stats
2016 2016 * zc_nvlist_dst property nvlist
2017 2017 * zc_nvlist_dst_size size of property nvlist
2018 2018 */
2019 2019 static int
2020 2020 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2021 2021 {
2022 2022 objset_t *os;
2023 2023 int error;
2024 2024
2025 2025 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2026 2026 if (error == 0) {
2027 2027 error = zfs_ioc_objset_stats_impl(zc, os);
2028 2028 dmu_objset_rele(os, FTAG);
2029 2029 }
2030 2030
2031 2031 return (error);
2032 2032 }
2033 2033
2034 2034 /*
2035 2035 * inputs:
2036 2036 * zc_name name of filesystem
2037 2037 * zc_nvlist_dst_size size of buffer for property nvlist
2038 2038 *
2039 2039 * outputs:
2040 2040 * zc_nvlist_dst received property nvlist
2041 2041 * zc_nvlist_dst_size size of received property nvlist
2042 2042 *
2043 2043 * Gets received properties (distinct from local properties on or after
2044 2044 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2045 2045 * local property values.
2046 2046 */
2047 2047 static int
2048 2048 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2049 2049 {
2050 2050 int error = 0;
2051 2051 nvlist_t *nv;
2052 2052
2053 2053 /*
2054 2054 * Without this check, we would return local property values if the
2055 2055 * caller has not already received properties on or after
2056 2056 * SPA_VERSION_RECVD_PROPS.
2057 2057 */
2058 2058 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2059 2059 return (SET_ERROR(ENOTSUP));
2060 2060
2061 2061 if (zc->zc_nvlist_dst != 0 &&
2062 2062 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2063 2063 error = put_nvlist(zc, nv);
2064 2064 nvlist_free(nv);
2065 2065 }
2066 2066
2067 2067 return (error);
2068 2068 }
2069 2069
2070 2070 static int
2071 2071 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2072 2072 {
2073 2073 uint64_t value;
2074 2074 int error;
2075 2075
2076 2076 /*
2077 2077 * zfs_get_zplprop() will either find a value or give us
2078 2078 * the default value (if there is one).
2079 2079 */
2080 2080 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2081 2081 return (error);
2082 2082 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2083 2083 return (0);
2084 2084 }
2085 2085
2086 2086 /*
2087 2087 * inputs:
2088 2088 * zc_name name of filesystem
2089 2089 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2090 2090 *
2091 2091 * outputs:
2092 2092 * zc_nvlist_dst zpl property nvlist
2093 2093 * zc_nvlist_dst_size size of zpl property nvlist
2094 2094 */
2095 2095 static int
2096 2096 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2097 2097 {
2098 2098 objset_t *os;
2099 2099 int err;
2100 2100
2101 2101 /* XXX reading without owning */
2102 2102 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2103 2103 return (err);
2104 2104
2105 2105 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2106 2106
2107 2107 /*
2108 2108 * NB: nvl_add_zplprop() will read the objset contents,
2109 2109 * which we aren't supposed to do with a DS_MODE_USER
2110 2110 * hold, because it could be inconsistent.
2111 2111 */
2112 2112 if (zc->zc_nvlist_dst != NULL &&
2113 2113 !zc->zc_objset_stats.dds_inconsistent &&
2114 2114 dmu_objset_type(os) == DMU_OST_ZFS) {
2115 2115 nvlist_t *nv;
2116 2116
2117 2117 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2118 2118 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2119 2119 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2120 2120 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2121 2121 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2122 2122 err = put_nvlist(zc, nv);
2123 2123 nvlist_free(nv);
2124 2124 } else {
2125 2125 err = SET_ERROR(ENOENT);
2126 2126 }
2127 2127 dmu_objset_rele(os, FTAG);
2128 2128 return (err);
2129 2129 }
2130 2130
2131 2131 static boolean_t
2132 2132 dataset_name_hidden(const char *name)
2133 2133 {
2134 2134 /*
2135 2135 * Skip over datasets that are not visible in this zone,
2136 2136 * internal datasets (which have a $ in their name), and
2137 2137 * temporary datasets (which have a % in their name).
2138 2138 */
2139 2139 if (strchr(name, '$') != NULL)
2140 2140 return (B_TRUE);
2141 2141 if (strchr(name, '%') != NULL)
2142 2142 return (B_TRUE);
2143 2143 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2144 2144 return (B_TRUE);
2145 2145 return (B_FALSE);
2146 2146 }
2147 2147
2148 2148 /*
2149 2149 * inputs:
2150 2150 * zc_name name of filesystem
2151 2151 * zc_cookie zap cursor
2152 2152 * zc_nvlist_dst_size size of buffer for property nvlist
2153 2153 *
2154 2154 * outputs:
2155 2155 * zc_name name of next filesystem
2156 2156 * zc_cookie zap cursor
2157 2157 * zc_objset_stats stats
2158 2158 * zc_nvlist_dst property nvlist
2159 2159 * zc_nvlist_dst_size size of property nvlist
2160 2160 */
2161 2161 static int
2162 2162 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2163 2163 {
2164 2164 objset_t *os;
2165 2165 int error;
2166 2166 char *p;
2167 2167 size_t orig_len = strlen(zc->zc_name);
2168 2168
2169 2169 top:
2170 2170 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2171 2171 if (error == ENOENT)
2172 2172 error = SET_ERROR(ESRCH);
2173 2173 return (error);
2174 2174 }
2175 2175
2176 2176 p = strrchr(zc->zc_name, '/');
2177 2177 if (p == NULL || p[1] != '\0')
2178 2178 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2179 2179 p = zc->zc_name + strlen(zc->zc_name);
2180 2180
2181 2181 do {
2182 2182 error = dmu_dir_list_next(os,
2183 2183 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2184 2184 NULL, &zc->zc_cookie);
2185 2185 if (error == ENOENT)
2186 2186 error = SET_ERROR(ESRCH);
2187 2187 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2188 2188 dmu_objset_rele(os, FTAG);
2189 2189
2190 2190 /*
2191 2191 * If it's an internal dataset (ie. with a '$' in its name),
2192 2192 * don't try to get stats for it, otherwise we'll return ENOENT.
2193 2193 */
2194 2194 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2195 2195 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2196 2196 if (error == ENOENT) {
2197 2197 /* We lost a race with destroy, get the next one. */
2198 2198 zc->zc_name[orig_len] = '\0';
2199 2199 goto top;
2200 2200 }
2201 2201 }
2202 2202 return (error);
2203 2203 }
2204 2204
2205 2205 /*
2206 2206 * inputs:
2207 2207 * zc_name name of filesystem
2208 2208 * zc_cookie zap cursor
2209 2209 * zc_nvlist_dst_size size of buffer for property nvlist
2210 2210 *
2211 2211 * outputs:
2212 2212 * zc_name name of next snapshot
2213 2213 * zc_objset_stats stats
2214 2214 * zc_nvlist_dst property nvlist
2215 2215 * zc_nvlist_dst_size size of property nvlist
2216 2216 */
2217 2217 static int
2218 2218 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2219 2219 {
2220 2220 objset_t *os;
2221 2221 int error;
2222 2222
2223 2223 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2224 2224 if (error != 0) {
2225 2225 return (error == ENOENT ? ESRCH : error);
2226 2226 }
2227 2227
2228 2228 /*
2229 2229 * A dataset name of maximum length cannot have any snapshots,
2230 2230 * so exit immediately.
2231 2231 */
2232 2232 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2233 2233 dmu_objset_rele(os, FTAG);
2234 2234 return (SET_ERROR(ESRCH));
2235 2235 }
2236 2236
2237 2237 error = dmu_snapshot_list_next(os,
2238 2238 sizeof (zc->zc_name) - strlen(zc->zc_name),
2239 2239 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2240 2240 NULL);
2241 2241
2242 2242 if (error == 0) {
2243 2243 dsl_dataset_t *ds;
2244 2244 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2245 2245
2246 2246 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2247 2247 if (error == 0) {
2248 2248 objset_t *ossnap;
2249 2249
2250 2250 error = dmu_objset_from_ds(ds, &ossnap);
2251 2251 if (error == 0)
2252 2252 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2253 2253 dsl_dataset_rele(ds, FTAG);
2254 2254 }
2255 2255 } else if (error == ENOENT) {
2256 2256 error = SET_ERROR(ESRCH);
2257 2257 }
2258 2258
2259 2259 dmu_objset_rele(os, FTAG);
2260 2260 /* if we failed, undo the @ that we tacked on to zc_name */
2261 2261 if (error != 0)
2262 2262 *strchr(zc->zc_name, '@') = '\0';
2263 2263 return (error);
2264 2264 }
2265 2265
2266 2266 static int
2267 2267 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2268 2268 {
2269 2269 const char *propname = nvpair_name(pair);
2270 2270 uint64_t *valary;
2271 2271 unsigned int vallen;
2272 2272 const char *domain;
2273 2273 char *dash;
2274 2274 zfs_userquota_prop_t type;
2275 2275 uint64_t rid;
2276 2276 uint64_t quota;
2277 2277 zfsvfs_t *zfsvfs;
2278 2278 int err;
2279 2279
2280 2280 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2281 2281 nvlist_t *attrs;
2282 2282 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2283 2283 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2284 2284 &pair) != 0)
2285 2285 return (SET_ERROR(EINVAL));
2286 2286 }
2287 2287
2288 2288 /*
2289 2289 * A correctly constructed propname is encoded as
2290 2290 * userquota@<rid>-<domain>.
2291 2291 */
2292 2292 if ((dash = strchr(propname, '-')) == NULL ||
2293 2293 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2294 2294 vallen != 3)
2295 2295 return (SET_ERROR(EINVAL));
2296 2296
2297 2297 domain = dash + 1;
2298 2298 type = valary[0];
2299 2299 rid = valary[1];
2300 2300 quota = valary[2];
2301 2301
2302 2302 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2303 2303 if (err == 0) {
2304 2304 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2305 2305 zfsvfs_rele(zfsvfs, FTAG);
2306 2306 }
2307 2307
2308 2308 return (err);
2309 2309 }
2310 2310
2311 2311 /*
2312 2312 * If the named property is one that has a special function to set its value,
2313 2313 * return 0 on success and a positive error code on failure; otherwise if it is
2314 2314 * not one of the special properties handled by this function, return -1.
2315 2315 *
2316 2316 * XXX: It would be better for callers of the property interface if we handled
2317 2317 * these special cases in dsl_prop.c (in the dsl layer).
2318 2318 */
2319 2319 static int
2320 2320 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2321 2321 nvpair_t *pair)
2322 2322 {
2323 2323 const char *propname = nvpair_name(pair);
2324 2324 zfs_prop_t prop = zfs_name_to_prop(propname);
2325 2325 uint64_t intval;
2326 2326 int err;
2327 2327
2328 2328 if (prop == ZPROP_INVAL) {
2329 2329 if (zfs_prop_userquota(propname))
2330 2330 return (zfs_prop_set_userquota(dsname, pair));
2331 2331 return (-1);
2332 2332 }
2333 2333
2334 2334 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2335 2335 nvlist_t *attrs;
2336 2336 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2337 2337 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2338 2338 &pair) == 0);
2339 2339 }
2340 2340
2341 2341 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2342 2342 return (-1);
2343 2343
2344 2344 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2345 2345
2346 2346 switch (prop) {
2347 2347 case ZFS_PROP_QUOTA:
2348 2348 err = dsl_dir_set_quota(dsname, source, intval);
2349 2349 break;
2350 2350 case ZFS_PROP_REFQUOTA:
2351 2351 err = dsl_dataset_set_refquota(dsname, source, intval);
2352 2352 break;
2353 2353 case ZFS_PROP_RESERVATION:
2354 2354 err = dsl_dir_set_reservation(dsname, source, intval);
2355 2355 break;
2356 2356 case ZFS_PROP_REFRESERVATION:
2357 2357 err = dsl_dataset_set_refreservation(dsname, source, intval);
2358 2358 break;
2359 2359 case ZFS_PROP_VOLSIZE:
2360 2360 err = zvol_set_volsize(dsname, intval);
2361 2361 break;
2362 2362 case ZFS_PROP_VERSION:
2363 2363 {
2364 2364 zfsvfs_t *zfsvfs;
2365 2365
2366 2366 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2367 2367 break;
2368 2368
2369 2369 err = zfs_set_version(zfsvfs, intval);
2370 2370 zfsvfs_rele(zfsvfs, FTAG);
2371 2371
2372 2372 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2373 2373 zfs_cmd_t *zc;
2374 2374
2375 2375 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2376 2376 (void) strcpy(zc->zc_name, dsname);
2377 2377 (void) zfs_ioc_userspace_upgrade(zc);
2378 2378 kmem_free(zc, sizeof (zfs_cmd_t));
2379 2379 }
2380 2380 break;
2381 2381 }
2382 2382 case ZFS_PROP_COMPRESSION:
2383 2383 {
2384 2384 if (intval == ZIO_COMPRESS_LZ4) {
2385 2385 zfeature_info_t *feature =
2386 2386 &spa_feature_table[SPA_FEATURE_LZ4_COMPRESS];
2387 2387 spa_t *spa;
2388 2388
2389 2389 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
2390 2390 return (err);
2391 2391
2392 2392 /*
2393 2393 * Setting the LZ4 compression algorithm activates
2394 2394 * the feature.
2395 2395 */
2396 2396 if (!spa_feature_is_active(spa, feature)) {
2397 2397 if ((err = zfs_prop_activate_feature(spa,
2398 2398 feature)) != 0) {
2399 2399 spa_close(spa, FTAG);
2400 2400 return (err);
2401 2401 }
2402 2402 }
2403 2403
2404 2404 spa_close(spa, FTAG);
2405 2405 }
2406 2406 /*
2407 2407 * We still want the default set action to be performed in the
2408 2408 * caller, we only performed zfeature settings here.
2409 2409 */
2410 2410 err = -1;
2411 2411 break;
2412 2412 }
2413 2413
2414 2414 default:
2415 2415 err = -1;
2416 2416 }
2417 2417
2418 2418 return (err);
2419 2419 }
2420 2420
2421 2421 /*
2422 2422 * This function is best effort. If it fails to set any of the given properties,
2423 2423 * it continues to set as many as it can and returns the last error
2424 2424 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2425 2425 * with the list of names of all the properties that failed along with the
2426 2426 * corresponding error numbers.
2427 2427 *
2428 2428 * If every property is set successfully, zero is returned and errlist is not
2429 2429 * modified.
2430 2430 */
2431 2431 int
2432 2432 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2433 2433 nvlist_t *errlist)
2434 2434 {
2435 2435 nvpair_t *pair;
2436 2436 nvpair_t *propval;
2437 2437 int rv = 0;
2438 2438 uint64_t intval;
2439 2439 char *strval;
2440 2440 nvlist_t *genericnvl = fnvlist_alloc();
2441 2441 nvlist_t *retrynvl = fnvlist_alloc();
2442 2442
2443 2443 retry:
2444 2444 pair = NULL;
2445 2445 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2446 2446 const char *propname = nvpair_name(pair);
2447 2447 zfs_prop_t prop = zfs_name_to_prop(propname);
2448 2448 int err = 0;
2449 2449
2450 2450 /* decode the property value */
2451 2451 propval = pair;
2452 2452 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2453 2453 nvlist_t *attrs;
2454 2454 attrs = fnvpair_value_nvlist(pair);
2455 2455 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2456 2456 &propval) != 0)
2457 2457 err = SET_ERROR(EINVAL);
2458 2458 }
2459 2459
2460 2460 /* Validate value type */
2461 2461 if (err == 0 && prop == ZPROP_INVAL) {
2462 2462 if (zfs_prop_user(propname)) {
2463 2463 if (nvpair_type(propval) != DATA_TYPE_STRING)
2464 2464 err = SET_ERROR(EINVAL);
2465 2465 } else if (zfs_prop_userquota(propname)) {
2466 2466 if (nvpair_type(propval) !=
2467 2467 DATA_TYPE_UINT64_ARRAY)
2468 2468 err = SET_ERROR(EINVAL);
2469 2469 } else {
2470 2470 err = SET_ERROR(EINVAL);
2471 2471 }
2472 2472 } else if (err == 0) {
2473 2473 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2474 2474 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2475 2475 err = SET_ERROR(EINVAL);
2476 2476 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2477 2477 const char *unused;
2478 2478
2479 2479 intval = fnvpair_value_uint64(propval);
2480 2480
2481 2481 switch (zfs_prop_get_type(prop)) {
2482 2482 case PROP_TYPE_NUMBER:
2483 2483 break;
2484 2484 case PROP_TYPE_STRING:
2485 2485 err = SET_ERROR(EINVAL);
2486 2486 break;
2487 2487 case PROP_TYPE_INDEX:
2488 2488 if (zfs_prop_index_to_string(prop,
2489 2489 intval, &unused) != 0)
2490 2490 err = SET_ERROR(EINVAL);
2491 2491 break;
2492 2492 default:
2493 2493 cmn_err(CE_PANIC,
2494 2494 "unknown property type");
2495 2495 }
2496 2496 } else {
2497 2497 err = SET_ERROR(EINVAL);
2498 2498 }
2499 2499 }
2500 2500
2501 2501 /* Validate permissions */
2502 2502 if (err == 0)
2503 2503 err = zfs_check_settable(dsname, pair, CRED());
2504 2504
2505 2505 if (err == 0) {
2506 2506 err = zfs_prop_set_special(dsname, source, pair);
2507 2507 if (err == -1) {
2508 2508 /*
2509 2509 * For better performance we build up a list of
2510 2510 * properties to set in a single transaction.
2511 2511 */
2512 2512 err = nvlist_add_nvpair(genericnvl, pair);
2513 2513 } else if (err != 0 && nvl != retrynvl) {
2514 2514 /*
2515 2515 * This may be a spurious error caused by
2516 2516 * receiving quota and reservation out of order.
2517 2517 * Try again in a second pass.
2518 2518 */
2519 2519 err = nvlist_add_nvpair(retrynvl, pair);
2520 2520 }
2521 2521 }
2522 2522
2523 2523 if (err != 0) {
2524 2524 if (errlist != NULL)
2525 2525 fnvlist_add_int32(errlist, propname, err);
2526 2526 rv = err;
2527 2527 }
2528 2528 }
2529 2529
2530 2530 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2531 2531 nvl = retrynvl;
2532 2532 goto retry;
2533 2533 }
2534 2534
2535 2535 if (!nvlist_empty(genericnvl) &&
2536 2536 dsl_props_set(dsname, source, genericnvl) != 0) {
2537 2537 /*
2538 2538 * If this fails, we still want to set as many properties as we
2539 2539 * can, so try setting them individually.
2540 2540 */
2541 2541 pair = NULL;
2542 2542 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2543 2543 const char *propname = nvpair_name(pair);
2544 2544 int err = 0;
2545 2545
2546 2546 propval = pair;
2547 2547 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2548 2548 nvlist_t *attrs;
2549 2549 attrs = fnvpair_value_nvlist(pair);
2550 2550 propval = fnvlist_lookup_nvpair(attrs,
2551 2551 ZPROP_VALUE);
2552 2552 }
2553 2553
2554 2554 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2555 2555 strval = fnvpair_value_string(propval);
2556 2556 err = dsl_prop_set_string(dsname, propname,
2557 2557 source, strval);
2558 2558 } else {
2559 2559 intval = fnvpair_value_uint64(propval);
2560 2560 err = dsl_prop_set_int(dsname, propname, source,
2561 2561 intval);
2562 2562 }
2563 2563
2564 2564 if (err != 0) {
2565 2565 if (errlist != NULL) {
2566 2566 fnvlist_add_int32(errlist, propname,
2567 2567 err);
2568 2568 }
2569 2569 rv = err;
2570 2570 }
2571 2571 }
2572 2572 }
2573 2573 nvlist_free(genericnvl);
2574 2574 nvlist_free(retrynvl);
2575 2575
2576 2576 return (rv);
2577 2577 }
2578 2578
2579 2579 /*
2580 2580 * Check that all the properties are valid user properties.
2581 2581 */
2582 2582 static int
2583 2583 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2584 2584 {
2585 2585 nvpair_t *pair = NULL;
2586 2586 int error = 0;
2587 2587
2588 2588 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2589 2589 const char *propname = nvpair_name(pair);
2590 2590 char *valstr;
2591 2591
2592 2592 if (!zfs_prop_user(propname) ||
2593 2593 nvpair_type(pair) != DATA_TYPE_STRING)
2594 2594 return (SET_ERROR(EINVAL));
2595 2595
2596 2596 if (error = zfs_secpolicy_write_perms(fsname,
2597 2597 ZFS_DELEG_PERM_USERPROP, CRED()))
2598 2598 return (error);
2599 2599
2600 2600 if (strlen(propname) >= ZAP_MAXNAMELEN)
2601 2601 return (SET_ERROR(ENAMETOOLONG));
2602 2602
2603 2603 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2604 2604 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2605 2605 return (E2BIG);
2606 2606 }
2607 2607 return (0);
2608 2608 }
2609 2609
2610 2610 static void
2611 2611 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2612 2612 {
2613 2613 nvpair_t *pair;
2614 2614
2615 2615 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2616 2616
2617 2617 pair = NULL;
2618 2618 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2619 2619 if (nvlist_exists(skipped, nvpair_name(pair)))
2620 2620 continue;
2621 2621
2622 2622 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2623 2623 }
2624 2624 }
2625 2625
2626 2626 static int
2627 2627 clear_received_props(const char *dsname, nvlist_t *props,
2628 2628 nvlist_t *skipped)
2629 2629 {
2630 2630 int err = 0;
2631 2631 nvlist_t *cleared_props = NULL;
2632 2632 props_skip(props, skipped, &cleared_props);
2633 2633 if (!nvlist_empty(cleared_props)) {
2634 2634 /*
2635 2635 * Acts on local properties until the dataset has received
2636 2636 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2637 2637 */
2638 2638 zprop_source_t flags = (ZPROP_SRC_NONE |
2639 2639 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2640 2640 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2641 2641 }
2642 2642 nvlist_free(cleared_props);
2643 2643 return (err);
2644 2644 }
2645 2645
2646 2646 /*
2647 2647 * inputs:
2648 2648 * zc_name name of filesystem
2649 2649 * zc_value name of property to set
2650 2650 * zc_nvlist_src{_size} nvlist of properties to apply
2651 2651 * zc_cookie received properties flag
2652 2652 *
2653 2653 * outputs:
2654 2654 * zc_nvlist_dst{_size} error for each unapplied received property
2655 2655 */
2656 2656 static int
2657 2657 zfs_ioc_set_prop(zfs_cmd_t *zc)
2658 2658 {
2659 2659 nvlist_t *nvl;
2660 2660 boolean_t received = zc->zc_cookie;
2661 2661 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2662 2662 ZPROP_SRC_LOCAL);
2663 2663 nvlist_t *errors;
2664 2664 int error;
2665 2665
2666 2666 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2667 2667 zc->zc_iflags, &nvl)) != 0)
2668 2668 return (error);
2669 2669
2670 2670 if (received) {
2671 2671 nvlist_t *origprops;
2672 2672
2673 2673 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2674 2674 (void) clear_received_props(zc->zc_name,
2675 2675 origprops, nvl);
2676 2676 nvlist_free(origprops);
2677 2677 }
2678 2678
2679 2679 error = dsl_prop_set_hasrecvd(zc->zc_name);
2680 2680 }
2681 2681
2682 2682 errors = fnvlist_alloc();
2683 2683 if (error == 0)
2684 2684 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2685 2685
2686 2686 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2687 2687 (void) put_nvlist(zc, errors);
2688 2688 }
2689 2689
2690 2690 nvlist_free(errors);
2691 2691 nvlist_free(nvl);
2692 2692 return (error);
2693 2693 }
2694 2694
2695 2695 /*
2696 2696 * inputs:
2697 2697 * zc_name name of filesystem
2698 2698 * zc_value name of property to inherit
2699 2699 * zc_cookie revert to received value if TRUE
2700 2700 *
2701 2701 * outputs: none
2702 2702 */
2703 2703 static int
2704 2704 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2705 2705 {
2706 2706 const char *propname = zc->zc_value;
2707 2707 zfs_prop_t prop = zfs_name_to_prop(propname);
2708 2708 boolean_t received = zc->zc_cookie;
2709 2709 zprop_source_t source = (received
2710 2710 ? ZPROP_SRC_NONE /* revert to received value, if any */
2711 2711 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2712 2712
2713 2713 if (received) {
2714 2714 nvlist_t *dummy;
2715 2715 nvpair_t *pair;
2716 2716 zprop_type_t type;
2717 2717 int err;
2718 2718
2719 2719 /*
2720 2720 * zfs_prop_set_special() expects properties in the form of an
2721 2721 * nvpair with type info.
2722 2722 */
2723 2723 if (prop == ZPROP_INVAL) {
2724 2724 if (!zfs_prop_user(propname))
2725 2725 return (SET_ERROR(EINVAL));
2726 2726
2727 2727 type = PROP_TYPE_STRING;
2728 2728 } else if (prop == ZFS_PROP_VOLSIZE ||
2729 2729 prop == ZFS_PROP_VERSION) {
2730 2730 return (SET_ERROR(EINVAL));
2731 2731 } else {
2732 2732 type = zfs_prop_get_type(prop);
2733 2733 }
2734 2734
2735 2735 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2736 2736
2737 2737 switch (type) {
2738 2738 case PROP_TYPE_STRING:
2739 2739 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2740 2740 break;
2741 2741 case PROP_TYPE_NUMBER:
2742 2742 case PROP_TYPE_INDEX:
2743 2743 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2744 2744 break;
2745 2745 default:
2746 2746 nvlist_free(dummy);
2747 2747 return (SET_ERROR(EINVAL));
2748 2748 }
2749 2749
2750 2750 pair = nvlist_next_nvpair(dummy, NULL);
2751 2751 err = zfs_prop_set_special(zc->zc_name, source, pair);
2752 2752 nvlist_free(dummy);
2753 2753 if (err != -1)
2754 2754 return (err); /* special property already handled */
2755 2755 } else {
2756 2756 /*
2757 2757 * Only check this in the non-received case. We want to allow
2758 2758 * 'inherit -S' to revert non-inheritable properties like quota
2759 2759 * and reservation to the received or default values even though
2760 2760 * they are not considered inheritable.
2761 2761 */
2762 2762 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2763 2763 return (SET_ERROR(EINVAL));
2764 2764 }
2765 2765
2766 2766 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2767 2767 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2768 2768 }
2769 2769
2770 2770 static int
2771 2771 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2772 2772 {
2773 2773 nvlist_t *props;
2774 2774 spa_t *spa;
2775 2775 int error;
2776 2776 nvpair_t *pair;
2777 2777
2778 2778 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2779 2779 zc->zc_iflags, &props))
2780 2780 return (error);
2781 2781
2782 2782 /*
2783 2783 * If the only property is the configfile, then just do a spa_lookup()
2784 2784 * to handle the faulted case.
2785 2785 */
2786 2786 pair = nvlist_next_nvpair(props, NULL);
2787 2787 if (pair != NULL && strcmp(nvpair_name(pair),
2788 2788 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2789 2789 nvlist_next_nvpair(props, pair) == NULL) {
2790 2790 mutex_enter(&spa_namespace_lock);
2791 2791 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2792 2792 spa_configfile_set(spa, props, B_FALSE);
2793 2793 spa_config_sync(spa, B_FALSE, B_TRUE);
2794 2794 }
2795 2795 mutex_exit(&spa_namespace_lock);
2796 2796 if (spa != NULL) {
2797 2797 nvlist_free(props);
2798 2798 return (0);
2799 2799 }
2800 2800 }
2801 2801
2802 2802 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2803 2803 nvlist_free(props);
2804 2804 return (error);
2805 2805 }
2806 2806
2807 2807 error = spa_prop_set(spa, props);
2808 2808
2809 2809 nvlist_free(props);
2810 2810 spa_close(spa, FTAG);
2811 2811
2812 2812 return (error);
2813 2813 }
2814 2814
2815 2815 static int
2816 2816 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2817 2817 {
2818 2818 spa_t *spa;
2819 2819 int error;
2820 2820 nvlist_t *nvp = NULL;
2821 2821
2822 2822 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2823 2823 /*
2824 2824 * If the pool is faulted, there may be properties we can still
2825 2825 * get (such as altroot and cachefile), so attempt to get them
2826 2826 * anyway.
2827 2827 */
2828 2828 mutex_enter(&spa_namespace_lock);
2829 2829 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2830 2830 error = spa_prop_get(spa, &nvp);
2831 2831 mutex_exit(&spa_namespace_lock);
2832 2832 } else {
2833 2833 error = spa_prop_get(spa, &nvp);
2834 2834 spa_close(spa, FTAG);
2835 2835 }
2836 2836
2837 2837 if (error == 0 && zc->zc_nvlist_dst != NULL)
2838 2838 error = put_nvlist(zc, nvp);
2839 2839 else
2840 2840 error = SET_ERROR(EFAULT);
2841 2841
2842 2842 nvlist_free(nvp);
2843 2843 return (error);
2844 2844 }
2845 2845
2846 2846 /*
2847 2847 * inputs:
2848 2848 * zc_name name of filesystem
2849 2849 * zc_nvlist_src{_size} nvlist of delegated permissions
2850 2850 * zc_perm_action allow/unallow flag
2851 2851 *
2852 2852 * outputs: none
2853 2853 */
2854 2854 static int
2855 2855 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2856 2856 {
2857 2857 int error;
2858 2858 nvlist_t *fsaclnv = NULL;
2859 2859
2860 2860 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2861 2861 zc->zc_iflags, &fsaclnv)) != 0)
2862 2862 return (error);
2863 2863
2864 2864 /*
2865 2865 * Verify nvlist is constructed correctly
2866 2866 */
2867 2867 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2868 2868 nvlist_free(fsaclnv);
2869 2869 return (SET_ERROR(EINVAL));
2870 2870 }
2871 2871
2872 2872 /*
2873 2873 * If we don't have PRIV_SYS_MOUNT, then validate
2874 2874 * that user is allowed to hand out each permission in
2875 2875 * the nvlist(s)
2876 2876 */
2877 2877
2878 2878 error = secpolicy_zfs(CRED());
2879 2879 if (error != 0) {
2880 2880 if (zc->zc_perm_action == B_FALSE) {
2881 2881 error = dsl_deleg_can_allow(zc->zc_name,
2882 2882 fsaclnv, CRED());
2883 2883 } else {
2884 2884 error = dsl_deleg_can_unallow(zc->zc_name,
2885 2885 fsaclnv, CRED());
2886 2886 }
2887 2887 }
2888 2888
2889 2889 if (error == 0)
2890 2890 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2891 2891
2892 2892 nvlist_free(fsaclnv);
2893 2893 return (error);
2894 2894 }
2895 2895
2896 2896 /*
2897 2897 * inputs:
2898 2898 * zc_name name of filesystem
2899 2899 *
2900 2900 * outputs:
2901 2901 * zc_nvlist_src{_size} nvlist of delegated permissions
2902 2902 */
2903 2903 static int
2904 2904 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2905 2905 {
2906 2906 nvlist_t *nvp;
2907 2907 int error;
2908 2908
2909 2909 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2910 2910 error = put_nvlist(zc, nvp);
2911 2911 nvlist_free(nvp);
2912 2912 }
2913 2913
2914 2914 return (error);
2915 2915 }
2916 2916
2917 2917 /*
2918 2918 * Search the vfs list for a specified resource. Returns a pointer to it
2919 2919 * or NULL if no suitable entry is found. The caller of this routine
2920 2920 * is responsible for releasing the returned vfs pointer.
2921 2921 */
2922 2922 static vfs_t *
2923 2923 zfs_get_vfs(const char *resource)
2924 2924 {
2925 2925 struct vfs *vfsp;
2926 2926 struct vfs *vfs_found = NULL;
2927 2927
2928 2928 vfs_list_read_lock();
2929 2929 vfsp = rootvfs;
2930 2930 do {
2931 2931 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2932 2932 VFS_HOLD(vfsp);
2933 2933 vfs_found = vfsp;
2934 2934 break;
2935 2935 }
2936 2936 vfsp = vfsp->vfs_next;
2937 2937 } while (vfsp != rootvfs);
2938 2938 vfs_list_unlock();
2939 2939 return (vfs_found);
2940 2940 }
2941 2941
2942 2942 /* ARGSUSED */
2943 2943 static void
2944 2944 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2945 2945 {
2946 2946 zfs_creat_t *zct = arg;
2947 2947
2948 2948 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2949 2949 }
2950 2950
2951 2951 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2952 2952
2953 2953 /*
2954 2954 * inputs:
2955 2955 * os parent objset pointer (NULL if root fs)
2956 2956 * fuids_ok fuids allowed in this version of the spa?
2957 2957 * sa_ok SAs allowed in this version of the spa?
2958 2958 * createprops list of properties requested by creator
2959 2959 *
2960 2960 * outputs:
2961 2961 * zplprops values for the zplprops we attach to the master node object
2962 2962 * is_ci true if requested file system will be purely case-insensitive
2963 2963 *
2964 2964 * Determine the settings for utf8only, normalization and
2965 2965 * casesensitivity. Specific values may have been requested by the
2966 2966 * creator and/or we can inherit values from the parent dataset. If
2967 2967 * the file system is of too early a vintage, a creator can not
2968 2968 * request settings for these properties, even if the requested
2969 2969 * setting is the default value. We don't actually want to create dsl
2970 2970 * properties for these, so remove them from the source nvlist after
2971 2971 * processing.
2972 2972 */
2973 2973 static int
2974 2974 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2975 2975 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2976 2976 nvlist_t *zplprops, boolean_t *is_ci)
2977 2977 {
2978 2978 uint64_t sense = ZFS_PROP_UNDEFINED;
2979 2979 uint64_t norm = ZFS_PROP_UNDEFINED;
2980 2980 uint64_t u8 = ZFS_PROP_UNDEFINED;
2981 2981
2982 2982 ASSERT(zplprops != NULL);
2983 2983
2984 2984 /*
2985 2985 * Pull out creator prop choices, if any.
2986 2986 */
2987 2987 if (createprops) {
2988 2988 (void) nvlist_lookup_uint64(createprops,
2989 2989 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
2990 2990 (void) nvlist_lookup_uint64(createprops,
2991 2991 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
2992 2992 (void) nvlist_remove_all(createprops,
2993 2993 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
2994 2994 (void) nvlist_lookup_uint64(createprops,
2995 2995 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
2996 2996 (void) nvlist_remove_all(createprops,
2997 2997 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
2998 2998 (void) nvlist_lookup_uint64(createprops,
2999 2999 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3000 3000 (void) nvlist_remove_all(createprops,
3001 3001 zfs_prop_to_name(ZFS_PROP_CASE));
3002 3002 }
3003 3003
3004 3004 /*
3005 3005 * If the zpl version requested is whacky or the file system
3006 3006 * or pool is version is too "young" to support normalization
3007 3007 * and the creator tried to set a value for one of the props,
3008 3008 * error out.
3009 3009 */
3010 3010 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3011 3011 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3012 3012 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3013 3013 (zplver < ZPL_VERSION_NORMALIZATION &&
3014 3014 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3015 3015 sense != ZFS_PROP_UNDEFINED)))
3016 3016 return (SET_ERROR(ENOTSUP));
3017 3017
3018 3018 /*
3019 3019 * Put the version in the zplprops
3020 3020 */
3021 3021 VERIFY(nvlist_add_uint64(zplprops,
3022 3022 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3023 3023
3024 3024 if (norm == ZFS_PROP_UNDEFINED)
3025 3025 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3026 3026 VERIFY(nvlist_add_uint64(zplprops,
3027 3027 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3028 3028
3029 3029 /*
3030 3030 * If we're normalizing, names must always be valid UTF-8 strings.
3031 3031 */
3032 3032 if (norm)
3033 3033 u8 = 1;
3034 3034 if (u8 == ZFS_PROP_UNDEFINED)
3035 3035 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3036 3036 VERIFY(nvlist_add_uint64(zplprops,
3037 3037 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3038 3038
3039 3039 if (sense == ZFS_PROP_UNDEFINED)
3040 3040 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3041 3041 VERIFY(nvlist_add_uint64(zplprops,
3042 3042 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3043 3043
3044 3044 if (is_ci)
3045 3045 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3046 3046
3047 3047 return (0);
3048 3048 }
3049 3049
3050 3050 static int
3051 3051 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3052 3052 nvlist_t *zplprops, boolean_t *is_ci)
3053 3053 {
3054 3054 boolean_t fuids_ok, sa_ok;
3055 3055 uint64_t zplver = ZPL_VERSION;
3056 3056 objset_t *os = NULL;
3057 3057 char parentname[MAXNAMELEN];
3058 3058 char *cp;
3059 3059 spa_t *spa;
3060 3060 uint64_t spa_vers;
3061 3061 int error;
3062 3062
3063 3063 (void) strlcpy(parentname, dataset, sizeof (parentname));
3064 3064 cp = strrchr(parentname, '/');
3065 3065 ASSERT(cp != NULL);
3066 3066 cp[0] = '\0';
3067 3067
3068 3068 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3069 3069 return (error);
3070 3070
3071 3071 spa_vers = spa_version(spa);
3072 3072 spa_close(spa, FTAG);
3073 3073
3074 3074 zplver = zfs_zpl_version_map(spa_vers);
3075 3075 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3076 3076 sa_ok = (zplver >= ZPL_VERSION_SA);
3077 3077
3078 3078 /*
3079 3079 * Open parent object set so we can inherit zplprop values.
3080 3080 */
3081 3081 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3082 3082 return (error);
3083 3083
3084 3084 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3085 3085 zplprops, is_ci);
3086 3086 dmu_objset_rele(os, FTAG);
3087 3087 return (error);
3088 3088 }
3089 3089
3090 3090 static int
3091 3091 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3092 3092 nvlist_t *zplprops, boolean_t *is_ci)
3093 3093 {
3094 3094 boolean_t fuids_ok;
3095 3095 boolean_t sa_ok;
3096 3096 uint64_t zplver = ZPL_VERSION;
3097 3097 int error;
3098 3098
3099 3099 zplver = zfs_zpl_version_map(spa_vers);
3100 3100 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3101 3101 sa_ok = (zplver >= ZPL_VERSION_SA);
3102 3102
3103 3103 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3104 3104 createprops, zplprops, is_ci);
3105 3105 return (error);
3106 3106 }
3107 3107
3108 3108 /*
3109 3109 * innvl: {
3110 3110 * "type" -> dmu_objset_type_t (int32)
3111 3111 * (optional) "props" -> { prop -> value }
3112 3112 * }
3113 3113 *
3114 3114 * outnvl: propname -> error code (int32)
3115 3115 */
3116 3116 static int
3117 3117 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3118 3118 {
3119 3119 int error = 0;
3120 3120 zfs_creat_t zct = { 0 };
3121 3121 nvlist_t *nvprops = NULL;
3122 3122 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3123 3123 int32_t type32;
3124 3124 dmu_objset_type_t type;
3125 3125 boolean_t is_insensitive = B_FALSE;
3126 3126
3127 3127 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3128 3128 return (SET_ERROR(EINVAL));
3129 3129 type = type32;
3130 3130 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3131 3131
3132 3132 switch (type) {
3133 3133 case DMU_OST_ZFS:
3134 3134 cbfunc = zfs_create_cb;
3135 3135 break;
3136 3136
3137 3137 case DMU_OST_ZVOL:
3138 3138 cbfunc = zvol_create_cb;
3139 3139 break;
3140 3140
3141 3141 default:
3142 3142 cbfunc = NULL;
3143 3143 break;
3144 3144 }
3145 3145 if (strchr(fsname, '@') ||
3146 3146 strchr(fsname, '%'))
3147 3147 return (SET_ERROR(EINVAL));
3148 3148
3149 3149 zct.zct_props = nvprops;
3150 3150
3151 3151 if (cbfunc == NULL)
3152 3152 return (SET_ERROR(EINVAL));
3153 3153
3154 3154 if (type == DMU_OST_ZVOL) {
3155 3155 uint64_t volsize, volblocksize;
3156 3156
3157 3157 if (nvprops == NULL)
3158 3158 return (SET_ERROR(EINVAL));
3159 3159 if (nvlist_lookup_uint64(nvprops,
3160 3160 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3161 3161 return (SET_ERROR(EINVAL));
3162 3162
3163 3163 if ((error = nvlist_lookup_uint64(nvprops,
3164 3164 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3165 3165 &volblocksize)) != 0 && error != ENOENT)
3166 3166 return (SET_ERROR(EINVAL));
3167 3167
3168 3168 if (error != 0)
3169 3169 volblocksize = zfs_prop_default_numeric(
3170 3170 ZFS_PROP_VOLBLOCKSIZE);
3171 3171
3172 3172 if ((error = zvol_check_volblocksize(
3173 3173 volblocksize)) != 0 ||
3174 3174 (error = zvol_check_volsize(volsize,
3175 3175 volblocksize)) != 0)
3176 3176 return (error);
3177 3177 } else if (type == DMU_OST_ZFS) {
3178 3178 int error;
3179 3179
3180 3180 /*
3181 3181 * We have to have normalization and
3182 3182 * case-folding flags correct when we do the
3183 3183 * file system creation, so go figure them out
3184 3184 * now.
3185 3185 */
3186 3186 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3187 3187 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3188 3188 error = zfs_fill_zplprops(fsname, nvprops,
3189 3189 zct.zct_zplprops, &is_insensitive);
3190 3190 if (error != 0) {
3191 3191 nvlist_free(zct.zct_zplprops);
3192 3192 return (error);
3193 3193 }
3194 3194 }
3195 3195
3196 3196 error = dmu_objset_create(fsname, type,
3197 3197 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3198 3198 nvlist_free(zct.zct_zplprops);
3199 3199
3200 3200 /*
3201 3201 * It would be nice to do this atomically.
3202 3202 */
3203 3203 if (error == 0) {
3204 3204 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3205 3205 nvprops, outnvl);
3206 3206 if (error != 0)
3207 3207 (void) dsl_destroy_head(fsname);
3208 3208 }
3209 3209 return (error);
3210 3210 }
3211 3211
3212 3212 /*
3213 3213 * innvl: {
3214 3214 * "origin" -> name of origin snapshot
3215 3215 * (optional) "props" -> { prop -> value }
3216 3216 * }
3217 3217 *
3218 3218 * outnvl: propname -> error code (int32)
3219 3219 */
3220 3220 static int
3221 3221 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3222 3222 {
3223 3223 int error = 0;
3224 3224 nvlist_t *nvprops = NULL;
3225 3225 char *origin_name;
3226 3226
3227 3227 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3228 3228 return (SET_ERROR(EINVAL));
3229 3229 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3230 3230
3231 3231 if (strchr(fsname, '@') ||
3232 3232 strchr(fsname, '%'))
3233 3233 return (SET_ERROR(EINVAL));
3234 3234
3235 3235 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3236 3236 return (SET_ERROR(EINVAL));
3237 3237 error = dmu_objset_clone(fsname, origin_name);
3238 3238 if (error != 0)
3239 3239 return (error);
3240 3240
3241 3241 /*
3242 3242 * It would be nice to do this atomically.
3243 3243 */
3244 3244 if (error == 0) {
3245 3245 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3246 3246 nvprops, outnvl);
3247 3247 if (error != 0)
3248 3248 (void) dsl_destroy_head(fsname);
3249 3249 }
3250 3250 return (error);
3251 3251 }
3252 3252
3253 3253 /*
3254 3254 * innvl: {
3255 3255 * "snaps" -> { snapshot1, snapshot2 }
3256 3256 * (optional) "props" -> { prop -> value (string) }
3257 3257 * }
3258 3258 *
3259 3259 * outnvl: snapshot -> error code (int32)
3260 3260 */
3261 3261 static int
3262 3262 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3263 3263 {
3264 3264 nvlist_t *snaps;
3265 3265 nvlist_t *props = NULL;
3266 3266 int error, poollen;
3267 3267 nvpair_t *pair;
3268 3268
3269 3269 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3270 3270 if ((error = zfs_check_userprops(poolname, props)) != 0)
3271 3271 return (error);
3272 3272
3273 3273 if (!nvlist_empty(props) &&
3274 3274 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3275 3275 return (SET_ERROR(ENOTSUP));
3276 3276
3277 3277 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3278 3278 return (SET_ERROR(EINVAL));
3279 3279 poollen = strlen(poolname);
3280 3280 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3281 3281 pair = nvlist_next_nvpair(snaps, pair)) {
3282 3282 const char *name = nvpair_name(pair);
3283 3283 const char *cp = strchr(name, '@');
3284 3284
3285 3285 /*
3286 3286 * The snap name must contain an @, and the part after it must
3287 3287 * contain only valid characters.
3288 3288 */
3289 3289 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3290 3290 return (SET_ERROR(EINVAL));
3291 3291
3292 3292 /*
3293 3293 * The snap must be in the specified pool.
3294 3294 */
3295 3295 if (strncmp(name, poolname, poollen) != 0 ||
3296 3296 (name[poollen] != '/' && name[poollen] != '@'))
3297 3297 return (SET_ERROR(EXDEV));
3298 3298
3299 3299 /* This must be the only snap of this fs. */
3300 3300 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3301 3301 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3302 3302 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3303 3303 == 0) {
3304 3304 return (SET_ERROR(EXDEV));
3305 3305 }
3306 3306 }
3307 3307 }
3308 3308
3309 3309 error = dsl_dataset_snapshot(snaps, props, outnvl);
3310 3310 return (error);
3311 3311 }
3312 3312
3313 3313 /*
3314 3314 * innvl: "message" -> string
3315 3315 */
3316 3316 /* ARGSUSED */
3317 3317 static int
3318 3318 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3319 3319 {
3320 3320 char *message;
3321 3321 spa_t *spa;
3322 3322 int error;
3323 3323 char *poolname;
3324 3324
3325 3325 /*
3326 3326 * The poolname in the ioctl is not set, we get it from the TSD,
3327 3327 * which was set at the end of the last successful ioctl that allows
3328 3328 * logging. The secpolicy func already checked that it is set.
3329 3329 * Only one log ioctl is allowed after each successful ioctl, so
3330 3330 * we clear the TSD here.
3331 3331 */
3332 3332 poolname = tsd_get(zfs_allow_log_key);
3333 3333 (void) tsd_set(zfs_allow_log_key, NULL);
3334 3334 error = spa_open(poolname, &spa, FTAG);
3335 3335 strfree(poolname);
3336 3336 if (error != 0)
3337 3337 return (error);
3338 3338
3339 3339 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3340 3340 spa_close(spa, FTAG);
3341 3341 return (SET_ERROR(EINVAL));
3342 3342 }
3343 3343
3344 3344 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3345 3345 spa_close(spa, FTAG);
3346 3346 return (SET_ERROR(ENOTSUP));
3347 3347 }
3348 3348
3349 3349 error = spa_history_log(spa, message);
3350 3350 spa_close(spa, FTAG);
3351 3351 return (error);
3352 3352 }
3353 3353
3354 3354 /*
3355 3355 * The dp_config_rwlock must not be held when calling this, because the
3356 3356 * unmount may need to write out data.
3357 3357 *
3358 3358 * This function is best-effort. Callers must deal gracefully if it
3359 3359 * remains mounted (or is remounted after this call).
3360 3360 *
3361 3361 * Returns 0 if the argument is not a snapshot, or it is not currently a
3362 3362 * filesystem, or we were able to unmount it. Returns error code otherwise.
3363 3363 */
3364 3364 int
3365 3365 zfs_unmount_snap(const char *snapname)
3366 3366 {
3367 3367 vfs_t *vfsp;
3368 3368 zfsvfs_t *zfsvfs;
3369 3369 int err;
3370 3370
3371 3371 if (strchr(snapname, '@') == NULL)
3372 3372 return (0);
3373 3373
3374 3374 vfsp = zfs_get_vfs(snapname);
3375 3375 if (vfsp == NULL)
3376 3376 return (0);
3377 3377
3378 3378 zfsvfs = vfsp->vfs_data;
3379 3379 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3380 3380
3381 3381 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3382 3382 VFS_RELE(vfsp);
3383 3383 if (err != 0)
3384 3384 return (SET_ERROR(err));
3385 3385
3386 3386 /*
3387 3387 * Always force the unmount for snapshots.
3388 3388 */
3389 3389 (void) dounmount(vfsp, MS_FORCE, kcred);
3390 3390 return (0);
3391 3391 }
3392 3392
3393 3393 /* ARGSUSED */
3394 3394 static int
3395 3395 zfs_unmount_snap_cb(const char *snapname, void *arg)
3396 3396 {
3397 3397 return (zfs_unmount_snap(snapname));
3398 3398 }
3399 3399
3400 3400 /*
3401 3401 * When a clone is destroyed, its origin may also need to be destroyed,
3402 3402 * in which case it must be unmounted. This routine will do that unmount
3403 3403 * if necessary.
3404 3404 */
3405 3405 void
3406 3406 zfs_destroy_unmount_origin(const char *fsname)
3407 3407 {
3408 3408 int error;
3409 3409 objset_t *os;
3410 3410 dsl_dataset_t *ds;
3411 3411
3412 3412 error = dmu_objset_hold(fsname, FTAG, &os);
3413 3413 if (error != 0)
3414 3414 return;
3415 3415 ds = dmu_objset_ds(os);
3416 3416 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3417 3417 char originname[MAXNAMELEN];
3418 3418 dsl_dataset_name(ds->ds_prev, originname);
3419 3419 dmu_objset_rele(os, FTAG);
3420 3420 (void) zfs_unmount_snap(originname);
3421 3421 } else {
3422 3422 dmu_objset_rele(os, FTAG);
3423 3423 }
3424 3424 }
3425 3425
3426 3426 /*
3427 3427 * innvl: {
3428 3428 * "snaps" -> { snapshot1, snapshot2 }
3429 3429 * (optional boolean) "defer"
3430 3430 * }
3431 3431 *
3432 3432 * outnvl: snapshot -> error code (int32)
3433 3433 *
3434 3434 */
3435 3435 static int
3436 3436 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3437 3437 {
3438 3438 int error, poollen;
3439 3439 nvlist_t *snaps;
3440 3440 nvpair_t *pair;
3441 3441 boolean_t defer;
3442 3442
3443 3443 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3444 3444 return (SET_ERROR(EINVAL));
3445 3445 defer = nvlist_exists(innvl, "defer");
3446 3446
3447 3447 poollen = strlen(poolname);
3448 3448 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3449 3449 pair = nvlist_next_nvpair(snaps, pair)) {
3450 3450 const char *name = nvpair_name(pair);
3451 3451
3452 3452 /*
3453 3453 * The snap must be in the specified pool.
3454 3454 */
3455 3455 if (strncmp(name, poolname, poollen) != 0 ||
3456 3456 (name[poollen] != '/' && name[poollen] != '@'))
3457 3457 return (SET_ERROR(EXDEV));
3458 3458
3459 3459 error = zfs_unmount_snap(name);
3460 3460 if (error != 0)
3461 3461 return (error);
3462 3462 }
3463 3463
3464 3464 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3465 3465 }
3466 3466
3467 3467 /*
3468 3468 * inputs:
3469 3469 * zc_name name of dataset to destroy
3470 3470 * zc_objset_type type of objset
3471 3471 * zc_defer_destroy mark for deferred destroy
3472 3472 *
3473 3473 * outputs: none
3474 3474 */
3475 3475 static int
3476 3476 zfs_ioc_destroy(zfs_cmd_t *zc)
3477 3477 {
3478 3478 int err;
3479 3479
3480 3480 if (zc->zc_objset_type == DMU_OST_ZFS) {
3481 3481 err = zfs_unmount_snap(zc->zc_name);
3482 3482 if (err != 0)
3483 3483 return (err);
3484 3484 }
3485 3485
3486 3486 if (strchr(zc->zc_name, '@'))
3487 3487 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3488 3488 else
3489 3489 err = dsl_destroy_head(zc->zc_name);
3490 3490 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3491 3491 (void) zvol_remove_minor(zc->zc_name);
3492 3492 return (err);
3493 3493 }
3494 3494
3495 3495 /*
3496 3496 * fsname is name of dataset to rollback (to most recent snapshot)
3497 3497 *
3498 3498 * innvl is not used.
3499 3499 *
3500 3500 * outnvl: "target" -> name of most recent snapshot
3501 3501 * }
3502 3502 */
3503 3503 /* ARGSUSED */
3504 3504 static int
3505 3505 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3506 3506 {
3507 3507 zfsvfs_t *zfsvfs;
3508 3508 int error;
3509 3509
3510 3510 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3511 3511 error = zfs_suspend_fs(zfsvfs);
3512 3512 if (error == 0) {
3513 3513 int resume_err;
3514 3514
3515 3515 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3516 3516 resume_err = zfs_resume_fs(zfsvfs, fsname);
3517 3517 error = error ? error : resume_err;
3518 3518 }
3519 3519 VFS_RELE(zfsvfs->z_vfs);
3520 3520 } else {
3521 3521 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3522 3522 }
3523 3523 return (error);
3524 3524 }
3525 3525
3526 3526 static int
3527 3527 recursive_unmount(const char *fsname, void *arg)
3528 3528 {
3529 3529 const char *snapname = arg;
3530 3530 char fullname[MAXNAMELEN];
3531 3531
3532 3532 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3533 3533 return (zfs_unmount_snap(fullname));
3534 3534 }
3535 3535
3536 3536 /*
3537 3537 * inputs:
3538 3538 * zc_name old name of dataset
3539 3539 * zc_value new name of dataset
3540 3540 * zc_cookie recursive flag (only valid for snapshots)
3541 3541 *
3542 3542 * outputs: none
3543 3543 */
3544 3544 static int
3545 3545 zfs_ioc_rename(zfs_cmd_t *zc)
3546 3546 {
3547 3547 boolean_t recursive = zc->zc_cookie & 1;
3548 3548 char *at;
3549 3549
3550 3550 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3551 3551 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3552 3552 strchr(zc->zc_value, '%'))
3553 3553 return (SET_ERROR(EINVAL));
3554 3554
3555 3555 at = strchr(zc->zc_name, '@');
3556 3556 if (at != NULL) {
3557 3557 /* snaps must be in same fs */
3558 3558 int error;
3559 3559
3560 3560 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3561 3561 return (SET_ERROR(EXDEV));
3562 3562 *at = '\0';
3563 3563 if (zc->zc_objset_type == DMU_OST_ZFS) {
3564 3564 error = dmu_objset_find(zc->zc_name,
3565 3565 recursive_unmount, at + 1,
3566 3566 recursive ? DS_FIND_CHILDREN : 0);
3567 3567 if (error != 0) {
3568 3568 *at = '@';
3569 3569 return (error);
3570 3570 }
3571 3571 }
3572 3572 error = dsl_dataset_rename_snapshot(zc->zc_name,
3573 3573 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3574 3574 *at = '@';
3575 3575
3576 3576 return (error);
3577 3577 } else {
3578 3578 if (zc->zc_objset_type == DMU_OST_ZVOL)
3579 3579 (void) zvol_remove_minor(zc->zc_name);
3580 3580 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3581 3581 }
3582 3582 }
3583 3583
3584 3584 static int
3585 3585 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3586 3586 {
3587 3587 const char *propname = nvpair_name(pair);
3588 3588 boolean_t issnap = (strchr(dsname, '@') != NULL);
3589 3589 zfs_prop_t prop = zfs_name_to_prop(propname);
3590 3590 uint64_t intval;
3591 3591 int err;
3592 3592
3593 3593 if (prop == ZPROP_INVAL) {
3594 3594 if (zfs_prop_user(propname)) {
3595 3595 if (err = zfs_secpolicy_write_perms(dsname,
3596 3596 ZFS_DELEG_PERM_USERPROP, cr))
3597 3597 return (err);
3598 3598 return (0);
3599 3599 }
3600 3600
3601 3601 if (!issnap && zfs_prop_userquota(propname)) {
3602 3602 const char *perm = NULL;
3603 3603 const char *uq_prefix =
3604 3604 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3605 3605 const char *gq_prefix =
3606 3606 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3607 3607
3608 3608 if (strncmp(propname, uq_prefix,
3609 3609 strlen(uq_prefix)) == 0) {
3610 3610 perm = ZFS_DELEG_PERM_USERQUOTA;
3611 3611 } else if (strncmp(propname, gq_prefix,
3612 3612 strlen(gq_prefix)) == 0) {
3613 3613 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3614 3614 } else {
3615 3615 /* USERUSED and GROUPUSED are read-only */
3616 3616 return (SET_ERROR(EINVAL));
3617 3617 }
3618 3618
3619 3619 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3620 3620 return (err);
3621 3621 return (0);
3622 3622 }
3623 3623
3624 3624 return (SET_ERROR(EINVAL));
3625 3625 }
3626 3626
3627 3627 if (issnap)
3628 3628 return (SET_ERROR(EINVAL));
3629 3629
3630 3630 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3631 3631 /*
3632 3632 * dsl_prop_get_all_impl() returns properties in this
3633 3633 * format.
3634 3634 */
3635 3635 nvlist_t *attrs;
3636 3636 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3637 3637 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3638 3638 &pair) == 0);
3639 3639 }
3640 3640
3641 3641 /*
3642 3642 * Check that this value is valid for this pool version
3643 3643 */
3644 3644 switch (prop) {
3645 3645 case ZFS_PROP_COMPRESSION:
3646 3646 /*
3647 3647 * If the user specified gzip compression, make sure
3648 3648 * the SPA supports it. We ignore any errors here since
3649 3649 * we'll catch them later.
3650 3650 */
3651 3651 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3652 3652 nvpair_value_uint64(pair, &intval) == 0) {
3653 3653 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3654 3654 intval <= ZIO_COMPRESS_GZIP_9 &&
3655 3655 zfs_earlier_version(dsname,
3656 3656 SPA_VERSION_GZIP_COMPRESSION)) {
3657 3657 return (SET_ERROR(ENOTSUP));
3658 3658 }
3659 3659
3660 3660 if (intval == ZIO_COMPRESS_ZLE &&
3661 3661 zfs_earlier_version(dsname,
3662 3662 SPA_VERSION_ZLE_COMPRESSION))
3663 3663 return (SET_ERROR(ENOTSUP));
3664 3664
3665 3665 if (intval == ZIO_COMPRESS_LZ4) {
3666 3666 zfeature_info_t *feature =
3667 3667 &spa_feature_table[
3668 3668 SPA_FEATURE_LZ4_COMPRESS];
3669 3669 spa_t *spa;
3670 3670
3671 3671 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3672 3672 return (err);
3673 3673
3674 3674 if (!spa_feature_is_enabled(spa, feature)) {
3675 3675 spa_close(spa, FTAG);
3676 3676 return (SET_ERROR(ENOTSUP));
3677 3677 }
3678 3678 spa_close(spa, FTAG);
3679 3679 }
3680 3680
3681 3681 /*
3682 3682 * If this is a bootable dataset then
3683 3683 * verify that the compression algorithm
3684 3684 * is supported for booting. We must return
3685 3685 * something other than ENOTSUP since it
3686 3686 * implies a downrev pool version.
3687 3687 */
3688 3688 if (zfs_is_bootfs(dsname) &&
3689 3689 !BOOTFS_COMPRESS_VALID(intval)) {
3690 3690 return (SET_ERROR(ERANGE));
3691 3691 }
3692 3692 }
3693 3693 break;
3694 3694
3695 3695 case ZFS_PROP_COPIES:
3696 3696 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3697 3697 return (SET_ERROR(ENOTSUP));
3698 3698 break;
3699 3699
3700 3700 case ZFS_PROP_DEDUP:
3701 3701 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3702 3702 return (SET_ERROR(ENOTSUP));
3703 3703 break;
3704 3704
3705 3705 case ZFS_PROP_SHARESMB:
3706 3706 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3707 3707 return (SET_ERROR(ENOTSUP));
3708 3708 break;
3709 3709
3710 3710 case ZFS_PROP_ACLINHERIT:
3711 3711 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3712 3712 nvpair_value_uint64(pair, &intval) == 0) {
3713 3713 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3714 3714 zfs_earlier_version(dsname,
3715 3715 SPA_VERSION_PASSTHROUGH_X))
3716 3716 return (SET_ERROR(ENOTSUP));
3717 3717 }
3718 3718 break;
3719 3719 }
3720 3720
3721 3721 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3722 3722 }
3723 3723
3724 3724 /*
3725 3725 * Checks for a race condition to make sure we don't increment a feature flag
3726 3726 * multiple times.
3727 3727 */
3728 3728 static int
3729 3729 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3730 3730 {
3731 3731 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3732 3732 zfeature_info_t *feature = arg;
3733 3733
3734 3734 if (!spa_feature_is_active(spa, feature))
3735 3735 return (0);
3736 3736 else
3737 3737 return (SET_ERROR(EBUSY));
3738 3738 }
3739 3739
3740 3740 /*
3741 3741 * The callback invoked on feature activation in the sync task caused by
3742 3742 * zfs_prop_activate_feature.
3743 3743 */
3744 3744 static void
3745 3745 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3746 3746 {
3747 3747 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3748 3748 zfeature_info_t *feature = arg;
3749 3749
3750 3750 spa_feature_incr(spa, feature, tx);
3751 3751 }
3752 3752
3753 3753 /*
3754 3754 * Activates a feature on a pool in response to a property setting. This
3755 3755 * creates a new sync task which modifies the pool to reflect the feature
3756 3756 * as being active.
3757 3757 */
3758 3758 static int
3759 3759 zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature)
3760 3760 {
3761 3761 int err;
3762 3762
3763 3763 /* EBUSY here indicates that the feature is already active */
3764 3764 err = dsl_sync_task(spa_name(spa),
3765 3765 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3766 3766 feature, 2);
3767 3767
3768 3768 if (err != 0 && err != EBUSY)
3769 3769 return (err);
3770 3770 else
3771 3771 return (0);
3772 3772 }
3773 3773
3774 3774 /*
3775 3775 * Removes properties from the given props list that fail permission checks
3776 3776 * needed to clear them and to restore them in case of a receive error. For each
3777 3777 * property, make sure we have both set and inherit permissions.
3778 3778 *
3779 3779 * Returns the first error encountered if any permission checks fail. If the
3780 3780 * caller provides a non-NULL errlist, it also gives the complete list of names
3781 3781 * of all the properties that failed a permission check along with the
3782 3782 * corresponding error numbers. The caller is responsible for freeing the
3783 3783 * returned errlist.
3784 3784 *
3785 3785 * If every property checks out successfully, zero is returned and the list
3786 3786 * pointed at by errlist is NULL.
3787 3787 */
3788 3788 static int
3789 3789 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3790 3790 {
3791 3791 zfs_cmd_t *zc;
3792 3792 nvpair_t *pair, *next_pair;
3793 3793 nvlist_t *errors;
3794 3794 int err, rv = 0;
3795 3795
3796 3796 if (props == NULL)
3797 3797 return (0);
3798 3798
3799 3799 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3800 3800
3801 3801 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3802 3802 (void) strcpy(zc->zc_name, dataset);
3803 3803 pair = nvlist_next_nvpair(props, NULL);
3804 3804 while (pair != NULL) {
3805 3805 next_pair = nvlist_next_nvpair(props, pair);
3806 3806
3807 3807 (void) strcpy(zc->zc_value, nvpair_name(pair));
3808 3808 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3809 3809 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3810 3810 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3811 3811 VERIFY(nvlist_add_int32(errors,
3812 3812 zc->zc_value, err) == 0);
3813 3813 }
3814 3814 pair = next_pair;
3815 3815 }
3816 3816 kmem_free(zc, sizeof (zfs_cmd_t));
3817 3817
3818 3818 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3819 3819 nvlist_free(errors);
3820 3820 errors = NULL;
3821 3821 } else {
3822 3822 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3823 3823 }
3824 3824
3825 3825 if (errlist == NULL)
3826 3826 nvlist_free(errors);
3827 3827 else
3828 3828 *errlist = errors;
3829 3829
3830 3830 return (rv);
3831 3831 }
3832 3832
3833 3833 static boolean_t
3834 3834 propval_equals(nvpair_t *p1, nvpair_t *p2)
3835 3835 {
3836 3836 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3837 3837 /* dsl_prop_get_all_impl() format */
3838 3838 nvlist_t *attrs;
3839 3839 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3840 3840 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3841 3841 &p1) == 0);
3842 3842 }
3843 3843
3844 3844 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3845 3845 nvlist_t *attrs;
3846 3846 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3847 3847 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3848 3848 &p2) == 0);
3849 3849 }
3850 3850
3851 3851 if (nvpair_type(p1) != nvpair_type(p2))
3852 3852 return (B_FALSE);
3853 3853
3854 3854 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3855 3855 char *valstr1, *valstr2;
3856 3856
3857 3857 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3858 3858 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3859 3859 return (strcmp(valstr1, valstr2) == 0);
3860 3860 } else {
3861 3861 uint64_t intval1, intval2;
3862 3862
3863 3863 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3864 3864 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3865 3865 return (intval1 == intval2);
3866 3866 }
3867 3867 }
3868 3868
3869 3869 /*
3870 3870 * Remove properties from props if they are not going to change (as determined
3871 3871 * by comparison with origprops). Remove them from origprops as well, since we
3872 3872 * do not need to clear or restore properties that won't change.
3873 3873 */
3874 3874 static void
3875 3875 props_reduce(nvlist_t *props, nvlist_t *origprops)
3876 3876 {
3877 3877 nvpair_t *pair, *next_pair;
3878 3878
3879 3879 if (origprops == NULL)
3880 3880 return; /* all props need to be received */
3881 3881
3882 3882 pair = nvlist_next_nvpair(props, NULL);
3883 3883 while (pair != NULL) {
3884 3884 const char *propname = nvpair_name(pair);
3885 3885 nvpair_t *match;
3886 3886
3887 3887 next_pair = nvlist_next_nvpair(props, pair);
3888 3888
3889 3889 if ((nvlist_lookup_nvpair(origprops, propname,
3890 3890 &match) != 0) || !propval_equals(pair, match))
3891 3891 goto next; /* need to set received value */
3892 3892
3893 3893 /* don't clear the existing received value */
3894 3894 (void) nvlist_remove_nvpair(origprops, match);
3895 3895 /* don't bother receiving the property */
3896 3896 (void) nvlist_remove_nvpair(props, pair);
3897 3897 next:
3898 3898 pair = next_pair;
3899 3899 }
3900 3900 }
3901 3901
3902 3902 #ifdef DEBUG
3903 3903 static boolean_t zfs_ioc_recv_inject_err;
3904 3904 #endif
3905 3905
3906 3906 /*
3907 3907 * inputs:
3908 3908 * zc_name name of containing filesystem
3909 3909 * zc_nvlist_src{_size} nvlist of properties to apply
3910 3910 * zc_value name of snapshot to create
3911 3911 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3912 3912 * zc_cookie file descriptor to recv from
3913 3913 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3914 3914 * zc_guid force flag
3915 3915 * zc_cleanup_fd cleanup-on-exit file descriptor
3916 3916 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3917 3917 *
3918 3918 * outputs:
3919 3919 * zc_cookie number of bytes read
3920 3920 * zc_nvlist_dst{_size} error for each unapplied received property
3921 3921 * zc_obj zprop_errflags_t
3922 3922 * zc_action_handle handle for this guid/ds mapping
3923 3923 */
3924 3924 static int
3925 3925 zfs_ioc_recv(zfs_cmd_t *zc)
3926 3926 {
3927 3927 file_t *fp;
3928 3928 dmu_recv_cookie_t drc;
3929 3929 boolean_t force = (boolean_t)zc->zc_guid;
3930 3930 int fd;
3931 3931 int error = 0;
3932 3932 int props_error = 0;
3933 3933 nvlist_t *errors;
3934 3934 offset_t off;
3935 3935 nvlist_t *props = NULL; /* sent properties */
3936 3936 nvlist_t *origprops = NULL; /* existing properties */
3937 3937 char *origin = NULL;
3938 3938 char *tosnap;
3939 3939 char tofs[ZFS_MAXNAMELEN];
3940 3940 boolean_t first_recvd_props = B_FALSE;
3941 3941
3942 3942 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3943 3943 strchr(zc->zc_value, '@') == NULL ||
3944 3944 strchr(zc->zc_value, '%'))
3945 3945 return (SET_ERROR(EINVAL));
3946 3946
3947 3947 (void) strcpy(tofs, zc->zc_value);
3948 3948 tosnap = strchr(tofs, '@');
3949 3949 *tosnap++ = '\0';
3950 3950
3951 3951 if (zc->zc_nvlist_src != NULL &&
3952 3952 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3953 3953 zc->zc_iflags, &props)) != 0)
3954 3954 return (error);
3955 3955
3956 3956 fd = zc->zc_cookie;
3957 3957 fp = getf(fd);
3958 3958 if (fp == NULL) {
3959 3959 nvlist_free(props);
3960 3960 return (SET_ERROR(EBADF));
3961 3961 }
3962 3962
3963 3963 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3964 3964
3965 3965 if (zc->zc_string[0])
3966 3966 origin = zc->zc_string;
3967 3967
3968 3968 error = dmu_recv_begin(tofs, tosnap,
3969 3969 &zc->zc_begin_record, force, origin, &drc);
3970 3970 if (error != 0)
3971 3971 goto out;
3972 3972
3973 3973 /*
3974 3974 * Set properties before we receive the stream so that they are applied
3975 3975 * to the new data. Note that we must call dmu_recv_stream() if
3976 3976 * dmu_recv_begin() succeeds.
3977 3977 */
3978 3978 if (props != NULL && !drc.drc_newfs) {
3979 3979 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
3980 3980 SPA_VERSION_RECVD_PROPS &&
3981 3981 !dsl_prop_get_hasrecvd(tofs))
3982 3982 first_recvd_props = B_TRUE;
3983 3983
3984 3984 /*
3985 3985 * If new received properties are supplied, they are to
3986 3986 * completely replace the existing received properties, so stash
3987 3987 * away the existing ones.
3988 3988 */
3989 3989 if (dsl_prop_get_received(tofs, &origprops) == 0) {
3990 3990 nvlist_t *errlist = NULL;
3991 3991 /*
3992 3992 * Don't bother writing a property if its value won't
3993 3993 * change (and avoid the unnecessary security checks).
3994 3994 *
3995 3995 * The first receive after SPA_VERSION_RECVD_PROPS is a
3996 3996 * special case where we blow away all local properties
3997 3997 * regardless.
3998 3998 */
3999 3999 if (!first_recvd_props)
4000 4000 props_reduce(props, origprops);
4001 4001 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4002 4002 (void) nvlist_merge(errors, errlist, 0);
4003 4003 nvlist_free(errlist);
4004 4004
4005 4005 if (clear_received_props(tofs, origprops,
4006 4006 first_recvd_props ? NULL : props) != 0)
4007 4007 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4008 4008 } else {
4009 4009 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4010 4010 }
4011 4011 }
4012 4012
4013 4013 if (props != NULL) {
4014 4014 props_error = dsl_prop_set_hasrecvd(tofs);
4015 4015
4016 4016 if (props_error == 0) {
4017 4017 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4018 4018 props, errors);
4019 4019 }
4020 4020 }
4021 4021
4022 4022 if (zc->zc_nvlist_dst_size != 0 &&
4023 4023 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4024 4024 put_nvlist(zc, errors) != 0)) {
4025 4025 /*
4026 4026 * Caller made zc->zc_nvlist_dst less than the minimum expected
4027 4027 * size or supplied an invalid address.
4028 4028 */
4029 4029 props_error = SET_ERROR(EINVAL);
4030 4030 }
4031 4031
4032 4032 off = fp->f_offset;
4033 4033 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4034 4034 &zc->zc_action_handle);
4035 4035
4036 4036 if (error == 0) {
4037 4037 zfsvfs_t *zfsvfs = NULL;
4038 4038
4039 4039 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4040 4040 /* online recv */
4041 4041 int end_err;
4042 4042
4043 4043 error = zfs_suspend_fs(zfsvfs);
4044 4044 /*
4045 4045 * If the suspend fails, then the recv_end will
4046 4046 * likely also fail, and clean up after itself.
4047 4047 */
4048 4048 end_err = dmu_recv_end(&drc, zfsvfs);
4049 4049 if (error == 0)
4050 4050 error = zfs_resume_fs(zfsvfs, tofs);
4051 4051 error = error ? error : end_err;
4052 4052 VFS_RELE(zfsvfs->z_vfs);
4053 4053 } else {
4054 4054 error = dmu_recv_end(&drc, NULL);
4055 4055 }
4056 4056 }
4057 4057
4058 4058 zc->zc_cookie = off - fp->f_offset;
4059 4059 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4060 4060 fp->f_offset = off;
4061 4061
4062 4062 #ifdef DEBUG
4063 4063 if (zfs_ioc_recv_inject_err) {
4064 4064 zfs_ioc_recv_inject_err = B_FALSE;
4065 4065 error = 1;
4066 4066 }
4067 4067 #endif
4068 4068 /*
4069 4069 * On error, restore the original props.
4070 4070 */
4071 4071 if (error != 0 && props != NULL && !drc.drc_newfs) {
4072 4072 if (clear_received_props(tofs, props, NULL) != 0) {
4073 4073 /*
4074 4074 * We failed to clear the received properties.
4075 4075 * Since we may have left a $recvd value on the
4076 4076 * system, we can't clear the $hasrecvd flag.
4077 4077 */
4078 4078 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4079 4079 } else if (first_recvd_props) {
4080 4080 dsl_prop_unset_hasrecvd(tofs);
4081 4081 }
4082 4082
4083 4083 if (origprops == NULL && !drc.drc_newfs) {
4084 4084 /* We failed to stash the original properties. */
4085 4085 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4086 4086 }
4087 4087
4088 4088 /*
4089 4089 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4090 4090 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4091 4091 * explictly if we're restoring local properties cleared in the
4092 4092 * first new-style receive.
4093 4093 */
4094 4094 if (origprops != NULL &&
4095 4095 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4096 4096 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4097 4097 origprops, NULL) != 0) {
4098 4098 /*
4099 4099 * We stashed the original properties but failed to
4100 4100 * restore them.
4101 4101 */
4102 4102 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4103 4103 }
4104 4104 }
4105 4105 out:
4106 4106 nvlist_free(props);
4107 4107 nvlist_free(origprops);
4108 4108 nvlist_free(errors);
4109 4109 releasef(fd);
4110 4110
4111 4111 if (error == 0)
4112 4112 error = props_error;
4113 4113
4114 4114 return (error);
4115 4115 }
4116 4116
4117 4117 /*
4118 4118 * inputs:
4119 4119 * zc_name name of snapshot to send
4120 4120 * zc_cookie file descriptor to send stream to
4121 4121 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4122 4122 * zc_sendobj objsetid of snapshot to send
4123 4123 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4124 4124 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4125 4125 * output size in zc_objset_type.
4126 4126 *
4127 4127 * outputs: none
4128 4128 */
4129 4129 static int
4130 4130 zfs_ioc_send(zfs_cmd_t *zc)
4131 4131 {
4132 4132 int error;
4133 4133 offset_t off;
4134 4134 boolean_t estimate = (zc->zc_guid != 0);
4135 4135
4136 4136 if (zc->zc_obj != 0) {
4137 4137 dsl_pool_t *dp;
4138 4138 dsl_dataset_t *tosnap;
4139 4139
4140 4140 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4141 4141 if (error != 0)
4142 4142 return (error);
4143 4143
4144 4144 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4145 4145 if (error != 0) {
4146 4146 dsl_pool_rele(dp, FTAG);
4147 4147 return (error);
4148 4148 }
4149 4149
4150 4150 if (dsl_dir_is_clone(tosnap->ds_dir))
4151 4151 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4152 4152 dsl_dataset_rele(tosnap, FTAG);
4153 4153 dsl_pool_rele(dp, FTAG);
4154 4154 }
4155 4155
4156 4156 if (estimate) {
4157 4157 dsl_pool_t *dp;
4158 4158 dsl_dataset_t *tosnap;
4159 4159 dsl_dataset_t *fromsnap = NULL;
4160 4160
4161 4161 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4162 4162 if (error != 0)
4163 4163 return (error);
4164 4164
4165 4165 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4166 4166 if (error != 0) {
4167 4167 dsl_pool_rele(dp, FTAG);
4168 4168 return (error);
4169 4169 }
4170 4170
4171 4171 if (zc->zc_fromobj != 0) {
4172 4172 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4173 4173 FTAG, &fromsnap);
4174 4174 if (error != 0) {
4175 4175 dsl_dataset_rele(tosnap, FTAG);
4176 4176 dsl_pool_rele(dp, FTAG);
4177 4177 return (error);
4178 4178 }
4179 4179 }
4180 4180
4181 4181 error = dmu_send_estimate(tosnap, fromsnap,
4182 4182 &zc->zc_objset_type);
4183 4183
4184 4184 if (fromsnap != NULL)
4185 4185 dsl_dataset_rele(fromsnap, FTAG);
4186 4186 dsl_dataset_rele(tosnap, FTAG);
4187 4187 dsl_pool_rele(dp, FTAG);
4188 4188 } else {
4189 4189 file_t *fp = getf(zc->zc_cookie);
4190 4190 if (fp == NULL)
4191 4191 return (SET_ERROR(EBADF));
4192 4192
4193 4193 off = fp->f_offset;
4194 4194 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4195 4195 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4196 4196
4197 4197 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4198 4198 fp->f_offset = off;
4199 4199 releasef(zc->zc_cookie);
4200 4200 }
4201 4201 return (error);
4202 4202 }
4203 4203
4204 4204 /*
4205 4205 * inputs:
4206 4206 * zc_name name of snapshot on which to report progress
4207 4207 * zc_cookie file descriptor of send stream
4208 4208 *
4209 4209 * outputs:
4210 4210 * zc_cookie number of bytes written in send stream thus far
4211 4211 */
4212 4212 static int
4213 4213 zfs_ioc_send_progress(zfs_cmd_t *zc)
4214 4214 {
4215 4215 dsl_pool_t *dp;
4216 4216 dsl_dataset_t *ds;
4217 4217 dmu_sendarg_t *dsp = NULL;
4218 4218 int error;
4219 4219
4220 4220 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4221 4221 if (error != 0)
4222 4222 return (error);
4223 4223
4224 4224 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4225 4225 if (error != 0) {
4226 4226 dsl_pool_rele(dp, FTAG);
4227 4227 return (error);
4228 4228 }
4229 4229
4230 4230 mutex_enter(&ds->ds_sendstream_lock);
4231 4231
4232 4232 /*
4233 4233 * Iterate over all the send streams currently active on this dataset.
4234 4234 * If there's one which matches the specified file descriptor _and_ the
4235 4235 * stream was started by the current process, return the progress of
4236 4236 * that stream.
4237 4237 */
4238 4238 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4239 4239 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4240 4240 if (dsp->dsa_outfd == zc->zc_cookie &&
4241 4241 dsp->dsa_proc == curproc)
4242 4242 break;
4243 4243 }
4244 4244
4245 4245 if (dsp != NULL)
4246 4246 zc->zc_cookie = *(dsp->dsa_off);
4247 4247 else
4248 4248 error = SET_ERROR(ENOENT);
4249 4249
4250 4250 mutex_exit(&ds->ds_sendstream_lock);
4251 4251 dsl_dataset_rele(ds, FTAG);
4252 4252 dsl_pool_rele(dp, FTAG);
4253 4253 return (error);
4254 4254 }
4255 4255
4256 4256 static int
4257 4257 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4258 4258 {
4259 4259 int id, error;
4260 4260
4261 4261 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4262 4262 &zc->zc_inject_record);
4263 4263
4264 4264 if (error == 0)
4265 4265 zc->zc_guid = (uint64_t)id;
4266 4266
4267 4267 return (error);
4268 4268 }
4269 4269
4270 4270 static int
4271 4271 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4272 4272 {
4273 4273 return (zio_clear_fault((int)zc->zc_guid));
4274 4274 }
4275 4275
4276 4276 static int
4277 4277 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4278 4278 {
4279 4279 int id = (int)zc->zc_guid;
4280 4280 int error;
4281 4281
4282 4282 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4283 4283 &zc->zc_inject_record);
4284 4284
4285 4285 zc->zc_guid = id;
4286 4286
4287 4287 return (error);
4288 4288 }
4289 4289
4290 4290 static int
4291 4291 zfs_ioc_error_log(zfs_cmd_t *zc)
4292 4292 {
4293 4293 spa_t *spa;
4294 4294 int error;
4295 4295 size_t count = (size_t)zc->zc_nvlist_dst_size;
4296 4296
4297 4297 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4298 4298 return (error);
4299 4299
4300 4300 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4301 4301 &count);
4302 4302 if (error == 0)
4303 4303 zc->zc_nvlist_dst_size = count;
4304 4304 else
4305 4305 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4306 4306
4307 4307 spa_close(spa, FTAG);
4308 4308
4309 4309 return (error);
4310 4310 }
4311 4311
4312 4312 static int
4313 4313 zfs_ioc_clear(zfs_cmd_t *zc)
4314 4314 {
4315 4315 spa_t *spa;
4316 4316 vdev_t *vd;
4317 4317 int error;
4318 4318
4319 4319 /*
4320 4320 * On zpool clear we also fix up missing slogs
4321 4321 */
4322 4322 mutex_enter(&spa_namespace_lock);
4323 4323 spa = spa_lookup(zc->zc_name);
4324 4324 if (spa == NULL) {
4325 4325 mutex_exit(&spa_namespace_lock);
4326 4326 return (SET_ERROR(EIO));
4327 4327 }
4328 4328 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4329 4329 /* we need to let spa_open/spa_load clear the chains */
4330 4330 spa_set_log_state(spa, SPA_LOG_CLEAR);
4331 4331 }
4332 4332 spa->spa_last_open_failed = 0;
4333 4333 mutex_exit(&spa_namespace_lock);
4334 4334
4335 4335 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4336 4336 error = spa_open(zc->zc_name, &spa, FTAG);
4337 4337 } else {
4338 4338 nvlist_t *policy;
4339 4339 nvlist_t *config = NULL;
4340 4340
4341 4341 if (zc->zc_nvlist_src == NULL)
4342 4342 return (SET_ERROR(EINVAL));
4343 4343
4344 4344 if ((error = get_nvlist(zc->zc_nvlist_src,
4345 4345 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4346 4346 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4347 4347 policy, &config);
4348 4348 if (config != NULL) {
4349 4349 int err;
4350 4350
4351 4351 if ((err = put_nvlist(zc, config)) != 0)
4352 4352 error = err;
4353 4353 nvlist_free(config);
4354 4354 }
4355 4355 nvlist_free(policy);
4356 4356 }
4357 4357 }
4358 4358
4359 4359 if (error != 0)
4360 4360 return (error);
4361 4361
4362 4362 spa_vdev_state_enter(spa, SCL_NONE);
4363 4363
4364 4364 if (zc->zc_guid == 0) {
4365 4365 vd = NULL;
4366 4366 } else {
4367 4367 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4368 4368 if (vd == NULL) {
4369 4369 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4370 4370 spa_close(spa, FTAG);
4371 4371 return (SET_ERROR(ENODEV));
4372 4372 }
4373 4373 }
4374 4374
4375 4375 vdev_clear(spa, vd);
4376 4376
4377 4377 (void) spa_vdev_state_exit(spa, NULL, 0);
4378 4378
4379 4379 /*
4380 4380 * Resume any suspended I/Os.
4381 4381 */
4382 4382 if (zio_resume(spa) != 0)
4383 4383 error = SET_ERROR(EIO);
4384 4384
4385 4385 spa_close(spa, FTAG);
4386 4386
4387 4387 return (error);
4388 4388 }
4389 4389
4390 4390 static int
4391 4391 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4392 4392 {
4393 4393 spa_t *spa;
4394 4394 int error;
4395 4395
4396 4396 error = spa_open(zc->zc_name, &spa, FTAG);
4397 4397 if (error != 0)
4398 4398 return (error);
4399 4399
4400 4400 spa_vdev_state_enter(spa, SCL_NONE);
4401 4401
4402 4402 /*
4403 4403 * If a resilver is already in progress then set the
4404 4404 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4405 4405 * the scan as a side effect of the reopen. Otherwise, let
4406 4406 * vdev_open() decided if a resilver is required.
4407 4407 */
4408 4408 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4409 4409 vdev_reopen(spa->spa_root_vdev);
4410 4410 spa->spa_scrub_reopen = B_FALSE;
4411 4411
4412 4412 (void) spa_vdev_state_exit(spa, NULL, 0);
4413 4413 spa_close(spa, FTAG);
4414 4414 return (0);
4415 4415 }
4416 4416 /*
4417 4417 * inputs:
4418 4418 * zc_name name of filesystem
4419 4419 * zc_value name of origin snapshot
4420 4420 *
4421 4421 * outputs:
4422 4422 * zc_string name of conflicting snapshot, if there is one
4423 4423 */
4424 4424 static int
4425 4425 zfs_ioc_promote(zfs_cmd_t *zc)
4426 4426 {
4427 4427 char *cp;
4428 4428
4429 4429 /*
4430 4430 * We don't need to unmount *all* the origin fs's snapshots, but
4431 4431 * it's easier.
4432 4432 */
4433 4433 cp = strchr(zc->zc_value, '@');
4434 4434 if (cp)
4435 4435 *cp = '\0';
4436 4436 (void) dmu_objset_find(zc->zc_value,
4437 4437 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4438 4438 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4439 4439 }
4440 4440
4441 4441 /*
4442 4442 * Retrieve a single {user|group}{used|quota}@... property.
4443 4443 *
4444 4444 * inputs:
4445 4445 * zc_name name of filesystem
4446 4446 * zc_objset_type zfs_userquota_prop_t
4447 4447 * zc_value domain name (eg. "S-1-234-567-89")
4448 4448 * zc_guid RID/UID/GID
4449 4449 *
4450 4450 * outputs:
4451 4451 * zc_cookie property value
4452 4452 */
4453 4453 static int
4454 4454 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4455 4455 {
4456 4456 zfsvfs_t *zfsvfs;
4457 4457 int error;
4458 4458
4459 4459 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4460 4460 return (SET_ERROR(EINVAL));
4461 4461
4462 4462 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4463 4463 if (error != 0)
4464 4464 return (error);
4465 4465
4466 4466 error = zfs_userspace_one(zfsvfs,
4467 4467 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4468 4468 zfsvfs_rele(zfsvfs, FTAG);
4469 4469
4470 4470 return (error);
4471 4471 }
4472 4472
4473 4473 /*
4474 4474 * inputs:
4475 4475 * zc_name name of filesystem
4476 4476 * zc_cookie zap cursor
4477 4477 * zc_objset_type zfs_userquota_prop_t
4478 4478 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4479 4479 *
4480 4480 * outputs:
4481 4481 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4482 4482 * zc_cookie zap cursor
4483 4483 */
4484 4484 static int
4485 4485 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4486 4486 {
4487 4487 zfsvfs_t *zfsvfs;
4488 4488 int bufsize = zc->zc_nvlist_dst_size;
4489 4489
4490 4490 if (bufsize <= 0)
4491 4491 return (SET_ERROR(ENOMEM));
4492 4492
4493 4493 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4494 4494 if (error != 0)
4495 4495 return (error);
4496 4496
4497 4497 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4498 4498
4499 4499 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4500 4500 buf, &zc->zc_nvlist_dst_size);
4501 4501
4502 4502 if (error == 0) {
4503 4503 error = xcopyout(buf,
4504 4504 (void *)(uintptr_t)zc->zc_nvlist_dst,
4505 4505 zc->zc_nvlist_dst_size);
4506 4506 }
4507 4507 kmem_free(buf, bufsize);
4508 4508 zfsvfs_rele(zfsvfs, FTAG);
4509 4509
4510 4510 return (error);
4511 4511 }
4512 4512
4513 4513 /*
4514 4514 * inputs:
4515 4515 * zc_name name of filesystem
4516 4516 *
4517 4517 * outputs:
4518 4518 * none
4519 4519 */
4520 4520 static int
4521 4521 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4522 4522 {
4523 4523 objset_t *os;
4524 4524 int error = 0;
4525 4525 zfsvfs_t *zfsvfs;
4526 4526
4527 4527 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4528 4528 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4529 4529 /*
4530 4530 * If userused is not enabled, it may be because the
4531 4531 * objset needs to be closed & reopened (to grow the
4532 4532 * objset_phys_t). Suspend/resume the fs will do that.
4533 4533 */
4534 4534 error = zfs_suspend_fs(zfsvfs);
4535 4535 if (error == 0) {
4536 4536 dmu_objset_refresh_ownership(zfsvfs->z_os,
4537 4537 zfsvfs);
4538 4538 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4539 4539 }
4540 4540 }
4541 4541 if (error == 0)
4542 4542 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4543 4543 VFS_RELE(zfsvfs->z_vfs);
4544 4544 } else {
4545 4545 /* XXX kind of reading contents without owning */
4546 4546 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4547 4547 if (error != 0)
4548 4548 return (error);
4549 4549
4550 4550 error = dmu_objset_userspace_upgrade(os);
4551 4551 dmu_objset_rele(os, FTAG);
4552 4552 }
4553 4553
4554 4554 return (error);
4555 4555 }
4556 4556
4557 4557 /*
4558 4558 * We don't want to have a hard dependency
4559 4559 * against some special symbols in sharefs
4560 4560 * nfs, and smbsrv. Determine them if needed when
4561 4561 * the first file system is shared.
4562 4562 * Neither sharefs, nfs or smbsrv are unloadable modules.
4563 4563 */
4564 4564 int (*znfsexport_fs)(void *arg);
4565 4565 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4566 4566 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4567 4567
4568 4568 int zfs_nfsshare_inited;
4569 4569 int zfs_smbshare_inited;
4570 4570
4571 4571 ddi_modhandle_t nfs_mod;
4572 4572 ddi_modhandle_t sharefs_mod;
4573 4573 ddi_modhandle_t smbsrv_mod;
4574 4574 kmutex_t zfs_share_lock;
4575 4575
4576 4576 static int
4577 4577 zfs_init_sharefs()
4578 4578 {
4579 4579 int error;
4580 4580
4581 4581 ASSERT(MUTEX_HELD(&zfs_share_lock));
4582 4582 /* Both NFS and SMB shares also require sharetab support. */
4583 4583 if (sharefs_mod == NULL && ((sharefs_mod =
4584 4584 ddi_modopen("fs/sharefs",
4585 4585 KRTLD_MODE_FIRST, &error)) == NULL)) {
4586 4586 return (SET_ERROR(ENOSYS));
4587 4587 }
4588 4588 if (zshare_fs == NULL && ((zshare_fs =
4589 4589 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4590 4590 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4591 4591 return (SET_ERROR(ENOSYS));
4592 4592 }
4593 4593 return (0);
4594 4594 }
4595 4595
4596 4596 static int
4597 4597 zfs_ioc_share(zfs_cmd_t *zc)
4598 4598 {
4599 4599 int error;
4600 4600 int opcode;
4601 4601
4602 4602 switch (zc->zc_share.z_sharetype) {
4603 4603 case ZFS_SHARE_NFS:
4604 4604 case ZFS_UNSHARE_NFS:
4605 4605 if (zfs_nfsshare_inited == 0) {
4606 4606 mutex_enter(&zfs_share_lock);
4607 4607 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4608 4608 KRTLD_MODE_FIRST, &error)) == NULL)) {
4609 4609 mutex_exit(&zfs_share_lock);
4610 4610 return (SET_ERROR(ENOSYS));
4611 4611 }
4612 4612 if (znfsexport_fs == NULL &&
4613 4613 ((znfsexport_fs = (int (*)(void *))
4614 4614 ddi_modsym(nfs_mod,
4615 4615 "nfs_export", &error)) == NULL)) {
4616 4616 mutex_exit(&zfs_share_lock);
4617 4617 return (SET_ERROR(ENOSYS));
4618 4618 }
4619 4619 error = zfs_init_sharefs();
4620 4620 if (error != 0) {
4621 4621 mutex_exit(&zfs_share_lock);
4622 4622 return (SET_ERROR(ENOSYS));
4623 4623 }
4624 4624 zfs_nfsshare_inited = 1;
4625 4625 mutex_exit(&zfs_share_lock);
4626 4626 }
4627 4627 break;
4628 4628 case ZFS_SHARE_SMB:
4629 4629 case ZFS_UNSHARE_SMB:
4630 4630 if (zfs_smbshare_inited == 0) {
4631 4631 mutex_enter(&zfs_share_lock);
4632 4632 if (smbsrv_mod == NULL && ((smbsrv_mod =
4633 4633 ddi_modopen("drv/smbsrv",
4634 4634 KRTLD_MODE_FIRST, &error)) == NULL)) {
4635 4635 mutex_exit(&zfs_share_lock);
4636 4636 return (SET_ERROR(ENOSYS));
4637 4637 }
4638 4638 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4639 4639 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4640 4640 "smb_server_share", &error)) == NULL)) {
4641 4641 mutex_exit(&zfs_share_lock);
4642 4642 return (SET_ERROR(ENOSYS));
4643 4643 }
4644 4644 error = zfs_init_sharefs();
4645 4645 if (error != 0) {
4646 4646 mutex_exit(&zfs_share_lock);
4647 4647 return (SET_ERROR(ENOSYS));
4648 4648 }
4649 4649 zfs_smbshare_inited = 1;
4650 4650 mutex_exit(&zfs_share_lock);
4651 4651 }
4652 4652 break;
4653 4653 default:
4654 4654 return (SET_ERROR(EINVAL));
4655 4655 }
4656 4656
4657 4657 switch (zc->zc_share.z_sharetype) {
4658 4658 case ZFS_SHARE_NFS:
4659 4659 case ZFS_UNSHARE_NFS:
4660 4660 if (error =
4661 4661 znfsexport_fs((void *)
4662 4662 (uintptr_t)zc->zc_share.z_exportdata))
4663 4663 return (error);
4664 4664 break;
4665 4665 case ZFS_SHARE_SMB:
4666 4666 case ZFS_UNSHARE_SMB:
4667 4667 if (error = zsmbexport_fs((void *)
4668 4668 (uintptr_t)zc->zc_share.z_exportdata,
4669 4669 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4670 4670 B_TRUE: B_FALSE)) {
4671 4671 return (error);
4672 4672 }
4673 4673 break;
4674 4674 }
4675 4675
4676 4676 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4677 4677 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4678 4678 SHAREFS_ADD : SHAREFS_REMOVE;
4679 4679
4680 4680 /*
4681 4681 * Add or remove share from sharetab
4682 4682 */
4683 4683 error = zshare_fs(opcode,
4684 4684 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4685 4685 zc->zc_share.z_sharemax);
4686 4686
4687 4687 return (error);
4688 4688
4689 4689 }
4690 4690
4691 4691 ace_t full_access[] = {
4692 4692 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4693 4693 };
4694 4694
4695 4695 /*
4696 4696 * inputs:
4697 4697 * zc_name name of containing filesystem
4698 4698 * zc_obj object # beyond which we want next in-use object #
4699 4699 *
4700 4700 * outputs:
4701 4701 * zc_obj next in-use object #
4702 4702 */
4703 4703 static int
4704 4704 zfs_ioc_next_obj(zfs_cmd_t *zc)
4705 4705 {
4706 4706 objset_t *os = NULL;
4707 4707 int error;
4708 4708
4709 4709 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4710 4710 if (error != 0)
4711 4711 return (error);
4712 4712
4713 4713 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4714 4714 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4715 4715
4716 4716 dmu_objset_rele(os, FTAG);
4717 4717 return (error);
4718 4718 }
4719 4719
4720 4720 /*
4721 4721 * inputs:
4722 4722 * zc_name name of filesystem
4723 4723 * zc_value prefix name for snapshot
4724 4724 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4725 4725 *
4726 4726 * outputs:
4727 4727 * zc_value short name of new snapshot
4728 4728 */
4729 4729 static int
4730 4730 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4731 4731 {
4732 4732 char *snap_name;
4733 4733 char *hold_name;
4734 4734 int error;
4735 4735 minor_t minor;
4736 4736
4737 4737 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4738 4738 if (error != 0)
4739 4739 return (error);
4740 4740
4741 4741 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4742 4742 (u_longlong_t)ddi_get_lbolt64());
4743 4743 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4744 4744
4745 4745 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4746 4746 hold_name);
4747 4747 if (error == 0)
4748 4748 (void) strcpy(zc->zc_value, snap_name);
4749 4749 strfree(snap_name);
4750 4750 strfree(hold_name);
4751 4751 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4752 4752 return (error);
4753 4753 }
4754 4754
4755 4755 /*
4756 4756 * inputs:
4757 4757 * zc_name name of "to" snapshot
4758 4758 * zc_value name of "from" snapshot
4759 4759 * zc_cookie file descriptor to write diff data on
4760 4760 *
4761 4761 * outputs:
4762 4762 * dmu_diff_record_t's to the file descriptor
4763 4763 */
4764 4764 static int
4765 4765 zfs_ioc_diff(zfs_cmd_t *zc)
4766 4766 {
4767 4767 file_t *fp;
4768 4768 offset_t off;
4769 4769 int error;
4770 4770
4771 4771 fp = getf(zc->zc_cookie);
4772 4772 if (fp == NULL)
4773 4773 return (SET_ERROR(EBADF));
4774 4774
4775 4775 off = fp->f_offset;
4776 4776
4777 4777 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4778 4778
4779 4779 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4780 4780 fp->f_offset = off;
4781 4781 releasef(zc->zc_cookie);
4782 4782
4783 4783 return (error);
4784 4784 }
4785 4785
4786 4786 /*
4787 4787 * Remove all ACL files in shares dir
4788 4788 */
4789 4789 static int
4790 4790 zfs_smb_acl_purge(znode_t *dzp)
4791 4791 {
4792 4792 zap_cursor_t zc;
4793 4793 zap_attribute_t zap;
4794 4794 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4795 4795 int error;
4796 4796
4797 4797 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4798 4798 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4799 4799 zap_cursor_advance(&zc)) {
4800 4800 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4801 4801 NULL, 0)) != 0)
4802 4802 break;
4803 4803 }
4804 4804 zap_cursor_fini(&zc);
4805 4805 return (error);
4806 4806 }
4807 4807
4808 4808 static int
4809 4809 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4810 4810 {
4811 4811 vnode_t *vp;
4812 4812 znode_t *dzp;
4813 4813 vnode_t *resourcevp = NULL;
4814 4814 znode_t *sharedir;
4815 4815 zfsvfs_t *zfsvfs;
4816 4816 nvlist_t *nvlist;
4817 4817 char *src, *target;
4818 4818 vattr_t vattr;
4819 4819 vsecattr_t vsec;
4820 4820 int error = 0;
4821 4821
4822 4822 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4823 4823 NO_FOLLOW, NULL, &vp)) != 0)
4824 4824 return (error);
4825 4825
4826 4826 /* Now make sure mntpnt and dataset are ZFS */
4827 4827
4828 4828 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4829 4829 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4830 4830 zc->zc_name) != 0)) {
4831 4831 VN_RELE(vp);
4832 4832 return (SET_ERROR(EINVAL));
4833 4833 }
4834 4834
4835 4835 dzp = VTOZ(vp);
4836 4836 zfsvfs = dzp->z_zfsvfs;
4837 4837 ZFS_ENTER(zfsvfs);
4838 4838
4839 4839 /*
4840 4840 * Create share dir if its missing.
4841 4841 */
4842 4842 mutex_enter(&zfsvfs->z_lock);
4843 4843 if (zfsvfs->z_shares_dir == 0) {
4844 4844 dmu_tx_t *tx;
4845 4845
4846 4846 tx = dmu_tx_create(zfsvfs->z_os);
4847 4847 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4848 4848 ZFS_SHARES_DIR);
4849 4849 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4850 4850 error = dmu_tx_assign(tx, TXG_WAIT);
4851 4851 if (error != 0) {
4852 4852 dmu_tx_abort(tx);
4853 4853 } else {
4854 4854 error = zfs_create_share_dir(zfsvfs, tx);
4855 4855 dmu_tx_commit(tx);
4856 4856 }
4857 4857 if (error != 0) {
4858 4858 mutex_exit(&zfsvfs->z_lock);
4859 4859 VN_RELE(vp);
4860 4860 ZFS_EXIT(zfsvfs);
4861 4861 return (error);
4862 4862 }
4863 4863 }
4864 4864 mutex_exit(&zfsvfs->z_lock);
4865 4865
4866 4866 ASSERT(zfsvfs->z_shares_dir);
4867 4867 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4868 4868 VN_RELE(vp);
4869 4869 ZFS_EXIT(zfsvfs);
4870 4870 return (error);
4871 4871 }
4872 4872
4873 4873 switch (zc->zc_cookie) {
4874 4874 case ZFS_SMB_ACL_ADD:
4875 4875 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4876 4876 vattr.va_type = VREG;
4877 4877 vattr.va_mode = S_IFREG|0777;
4878 4878 vattr.va_uid = 0;
4879 4879 vattr.va_gid = 0;
4880 4880
4881 4881 vsec.vsa_mask = VSA_ACE;
4882 4882 vsec.vsa_aclentp = &full_access;
4883 4883 vsec.vsa_aclentsz = sizeof (full_access);
4884 4884 vsec.vsa_aclcnt = 1;
4885 4885
4886 4886 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4887 4887 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4888 4888 if (resourcevp)
4889 4889 VN_RELE(resourcevp);
4890 4890 break;
4891 4891
4892 4892 case ZFS_SMB_ACL_REMOVE:
4893 4893 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4894 4894 NULL, 0);
4895 4895 break;
4896 4896
4897 4897 case ZFS_SMB_ACL_RENAME:
4898 4898 if ((error = get_nvlist(zc->zc_nvlist_src,
4899 4899 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4900 4900 VN_RELE(vp);
4901 4901 ZFS_EXIT(zfsvfs);
4902 4902 return (error);
4903 4903 }
4904 4904 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4905 4905 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4906 4906 &target)) {
4907 4907 VN_RELE(vp);
4908 4908 VN_RELE(ZTOV(sharedir));
4909 4909 ZFS_EXIT(zfsvfs);
4910 4910 nvlist_free(nvlist);
4911 4911 return (error);
4912 4912 }
4913 4913 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4914 4914 kcred, NULL, 0);
4915 4915 nvlist_free(nvlist);
4916 4916 break;
4917 4917
4918 4918 case ZFS_SMB_ACL_PURGE:
4919 4919 error = zfs_smb_acl_purge(sharedir);
4920 4920 break;
4921 4921
4922 4922 default:
4923 4923 error = SET_ERROR(EINVAL);
4924 4924 break;
4925 4925 }
4926 4926
4927 4927 VN_RELE(vp);
4928 4928 VN_RELE(ZTOV(sharedir));
4929 4929
4930 4930 ZFS_EXIT(zfsvfs);
4931 4931
4932 4932 return (error);
4933 4933 }
4934 4934
4935 4935 /*
4936 4936 * innvl: {
4937 4937 * "holds" -> { snapname -> holdname (string), ... }
4938 4938 * (optional) "cleanup_fd" -> fd (int32)
4939 4939 * }
4940 4940 *
4941 4941 * outnvl: {
4942 4942 * snapname -> error value (int32)
4943 4943 * ...
4944 4944 * }
4945 4945 */
4946 4946 /* ARGSUSED */
4947 4947 static int
4948 4948 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
4949 4949 {
4950 4950 nvlist_t *holds;
4951 4951 int cleanup_fd = -1;
4952 4952 int error;
4953 4953 minor_t minor = 0;
4954 4954
4955 4955 error = nvlist_lookup_nvlist(args, "holds", &holds);
4956 4956 if (error != 0)
4957 4957 return (SET_ERROR(EINVAL));
4958 4958
4959 4959 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
4960 4960 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
4961 4961 if (error != 0)
4962 4962 return (error);
4963 4963 }
4964 4964
4965 4965 error = dsl_dataset_user_hold(holds, minor, errlist);
4966 4966 if (minor != 0)
4967 4967 zfs_onexit_fd_rele(cleanup_fd);
4968 4968 return (error);
4969 4969 }
4970 4970
4971 4971 /*
4972 4972 * innvl is not used.
4973 4973 *
4974 4974 * outnvl: {
4975 4975 * holdname -> time added (uint64 seconds since epoch)
4976 4976 * ...
4977 4977 * }
4978 4978 */
4979 4979 /* ARGSUSED */
4980 4980 static int
4981 4981 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
4982 4982 {
4983 4983 return (dsl_dataset_get_holds(snapname, outnvl));
4984 4984 }
4985 4985
4986 4986 /*
4987 4987 * innvl: {
4988 4988 * snapname -> { holdname, ... }
4989 4989 * ...
4990 4990 * }
4991 4991 *
4992 4992 * outnvl: {
4993 4993 * snapname -> error value (int32)
4994 4994 * ...
4995 4995 * }
4996 4996 */
4997 4997 /* ARGSUSED */
4998 4998 static int
4999 4999 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5000 5000 {
5001 5001 return (dsl_dataset_user_release(holds, errlist));
5002 5002 }
5003 5003
5004 5004 /*
5005 5005 * inputs:
5006 5006 * zc_name name of new filesystem or snapshot
5007 5007 * zc_value full name of old snapshot
5008 5008 *
5009 5009 * outputs:
5010 5010 * zc_cookie space in bytes
5011 5011 * zc_objset_type compressed space in bytes
5012 5012 * zc_perm_action uncompressed space in bytes
5013 5013 */
5014 5014 static int
5015 5015 zfs_ioc_space_written(zfs_cmd_t *zc)
5016 5016 {
5017 5017 int error;
5018 5018 dsl_pool_t *dp;
5019 5019 dsl_dataset_t *new, *old;
5020 5020
5021 5021 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5022 5022 if (error != 0)
5023 5023 return (error);
5024 5024 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5025 5025 if (error != 0) {
5026 5026 dsl_pool_rele(dp, FTAG);
5027 5027 return (error);
5028 5028 }
5029 5029 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5030 5030 if (error != 0) {
5031 5031 dsl_dataset_rele(new, FTAG);
5032 5032 dsl_pool_rele(dp, FTAG);
5033 5033 return (error);
5034 5034 }
5035 5035
5036 5036 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5037 5037 &zc->zc_objset_type, &zc->zc_perm_action);
5038 5038 dsl_dataset_rele(old, FTAG);
5039 5039 dsl_dataset_rele(new, FTAG);
5040 5040 dsl_pool_rele(dp, FTAG);
5041 5041 return (error);
5042 5042 }
5043 5043
5044 5044 /*
5045 5045 * innvl: {
5046 5046 * "firstsnap" -> snapshot name
5047 5047 * }
5048 5048 *
5049 5049 * outnvl: {
5050 5050 * "used" -> space in bytes
5051 5051 * "compressed" -> compressed space in bytes
5052 5052 * "uncompressed" -> uncompressed space in bytes
5053 5053 * }
5054 5054 */
5055 5055 static int
5056 5056 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5057 5057 {
5058 5058 int error;
5059 5059 dsl_pool_t *dp;
5060 5060 dsl_dataset_t *new, *old;
5061 5061 char *firstsnap;
5062 5062 uint64_t used, comp, uncomp;
5063 5063
5064 5064 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5065 5065 return (SET_ERROR(EINVAL));
5066 5066
5067 5067 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5068 5068 if (error != 0)
5069 5069 return (error);
5070 5070
5071 5071 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5072 5072 if (error != 0) {
5073 5073 dsl_pool_rele(dp, FTAG);
5074 5074 return (error);
5075 5075 }
5076 5076 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5077 5077 if (error != 0) {
5078 5078 dsl_dataset_rele(new, FTAG);
5079 5079 dsl_pool_rele(dp, FTAG);
5080 5080 return (error);
5081 5081 }
5082 5082
5083 5083 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5084 5084 dsl_dataset_rele(old, FTAG);
5085 5085 dsl_dataset_rele(new, FTAG);
5086 5086 dsl_pool_rele(dp, FTAG);
5087 5087 fnvlist_add_uint64(outnvl, "used", used);
5088 5088 fnvlist_add_uint64(outnvl, "compressed", comp);
5089 5089 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5090 5090 return (error);
5091 5091 }
5092 5092
5093 5093 /*
5094 5094 * innvl: {
5095 5095 * "fd" -> file descriptor to write stream to (int32)
5096 5096 * (optional) "fromsnap" -> full snap name to send an incremental from
5097 5097 * }
5098 5098 *
5099 5099 * outnvl is unused
5100 5100 */
5101 5101 /* ARGSUSED */
5102 5102 static int
5103 5103 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5104 5104 {
5105 5105 int error;
5106 5106 offset_t off;
5107 5107 char *fromname = NULL;
5108 5108 int fd;
5109 5109
5110 5110 error = nvlist_lookup_int32(innvl, "fd", &fd);
5111 5111 if (error != 0)
5112 5112 return (SET_ERROR(EINVAL));
5113 5113
5114 5114 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5115 5115
5116 5116 file_t *fp = getf(fd);
5117 5117 if (fp == NULL)
5118 5118 return (SET_ERROR(EBADF));
5119 5119
5120 5120 off = fp->f_offset;
5121 5121 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5122 5122
5123 5123 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5124 5124 fp->f_offset = off;
5125 5125 releasef(fd);
5126 5126 return (error);
5127 5127 }
5128 5128
5129 5129 /*
5130 5130 * Determine approximately how large a zfs send stream will be -- the number
5131 5131 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5132 5132 *
5133 5133 * innvl: {
5134 5134 * (optional) "fromsnap" -> full snap name to send an incremental from
5135 5135 * }
5136 5136 *
5137 5137 * outnvl: {
5138 5138 * "space" -> bytes of space (uint64)
5139 5139 * }
5140 5140 */
5141 5141 static int
5142 5142 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5143 5143 {
5144 5144 dsl_pool_t *dp;
5145 5145 dsl_dataset_t *fromsnap = NULL;
5146 5146 dsl_dataset_t *tosnap;
5147 5147 int error;
5148 5148 char *fromname;
5149 5149 uint64_t space;
5150 5150
5151 5151 error = dsl_pool_hold(snapname, FTAG, &dp);
5152 5152 if (error != 0)
5153 5153 return (error);
5154 5154
5155 5155 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5156 5156 if (error != 0) {
5157 5157 dsl_pool_rele(dp, FTAG);
5158 5158 return (error);
5159 5159 }
5160 5160
5161 5161 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5162 5162 if (error == 0) {
5163 5163 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5164 5164 if (error != 0) {
5165 5165 dsl_dataset_rele(tosnap, FTAG);
5166 5166 dsl_pool_rele(dp, FTAG);
5167 5167 return (error);
5168 5168 }
5169 5169 }
5170 5170
5171 5171 error = dmu_send_estimate(tosnap, fromsnap, &space);
5172 5172 fnvlist_add_uint64(outnvl, "space", space);
5173 5173
5174 5174 if (fromsnap != NULL)
5175 5175 dsl_dataset_rele(fromsnap, FTAG);
5176 5176 dsl_dataset_rele(tosnap, FTAG);
5177 5177 dsl_pool_rele(dp, FTAG);
5178 5178 return (error);
5179 5179 }
5180 5180
5181 5181
5182 5182 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5183 5183
5184 5184 static void
5185 5185 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5186 5186 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5187 5187 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5188 5188 {
5189 5189 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5190 5190
5191 5191 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5192 5192 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5193 5193 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5194 5194 ASSERT3P(vec->zvec_func, ==, NULL);
5195 5195
5196 5196 vec->zvec_legacy_func = func;
5197 5197 vec->zvec_secpolicy = secpolicy;
5198 5198 vec->zvec_namecheck = namecheck;
5199 5199 vec->zvec_allow_log = log_history;
5200 5200 vec->zvec_pool_check = pool_check;
5201 5201 }
5202 5202
5203 5203 /*
5204 5204 * See the block comment at the beginning of this file for details on
5205 5205 * each argument to this function.
5206 5206 */
5207 5207 static void
5208 5208 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5209 5209 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5210 5210 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5211 5211 boolean_t allow_log)
5212 5212 {
5213 5213 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5214 5214
5215 5215 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5216 5216 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5217 5217 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5218 5218 ASSERT3P(vec->zvec_func, ==, NULL);
5219 5219
5220 5220 /* if we are logging, the name must be valid */
5221 5221 ASSERT(!allow_log || namecheck != NO_NAME);
5222 5222
5223 5223 vec->zvec_name = name;
5224 5224 vec->zvec_func = func;
5225 5225 vec->zvec_secpolicy = secpolicy;
5226 5226 vec->zvec_namecheck = namecheck;
5227 5227 vec->zvec_pool_check = pool_check;
5228 5228 vec->zvec_smush_outnvlist = smush_outnvlist;
5229 5229 vec->zvec_allow_log = allow_log;
5230 5230 }
5231 5231
5232 5232 static void
5233 5233 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5234 5234 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5235 5235 zfs_ioc_poolcheck_t pool_check)
5236 5236 {
5237 5237 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5238 5238 POOL_NAME, log_history, pool_check);
5239 5239 }
5240 5240
5241 5241 static void
5242 5242 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5243 5243 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5244 5244 {
5245 5245 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5246 5246 DATASET_NAME, B_FALSE, pool_check);
5247 5247 }
5248 5248
5249 5249 static void
5250 5250 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5251 5251 {
5252 5252 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5253 5253 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5254 5254 }
5255 5255
5256 5256 static void
5257 5257 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5258 5258 zfs_secpolicy_func_t *secpolicy)
5259 5259 {
5260 5260 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5261 5261 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5262 5262 }
5263 5263
5264 5264 static void
5265 5265 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5266 5266 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5267 5267 {
5268 5268 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5269 5269 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5270 5270 }
5271 5271
5272 5272 static void
5273 5273 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5274 5274 {
5275 5275 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5276 5276 zfs_secpolicy_read);
5277 5277 }
5278 5278
5279 5279 static void
5280 5280 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5281 5281 zfs_secpolicy_func_t *secpolicy)
5282 5282 {
5283 5283 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5284 5284 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5285 5285 }
5286 5286
5287 5287 static void
5288 5288 zfs_ioctl_init(void)
5289 5289 {
5290 5290 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5291 5291 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5292 5292 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5293 5293
5294 5294 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5295 5295 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5296 5296 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5297 5297
5298 5298 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5299 5299 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5300 5300 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5301 5301
5302 5302 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5303 5303 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5304 5304 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5305 5305
5306 5306 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5307 5307 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5308 5308 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5309 5309
5310 5310 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5311 5311 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5312 5312 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5313 5313
5314 5314 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5315 5315 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5316 5316 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5317 5317
5318 5318 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5319 5319 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5320 5320 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5321 5321
5322 5322 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5323 5323 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5324 5324 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5325 5325 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5326 5326 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5327 5327 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5328 5328
5329 5329 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5330 5330 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5331 5331 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5332 5332
5333 5333 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5334 5334 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5335 5335 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5336 5336
5337 5337 /* IOCTLS that use the legacy function signature */
5338 5338
5339 5339 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5340 5340 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5341 5341
5342 5342 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5343 5343 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5344 5344 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5345 5345 zfs_ioc_pool_scan);
5346 5346 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5347 5347 zfs_ioc_pool_upgrade);
5348 5348 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5349 5349 zfs_ioc_vdev_add);
5350 5350 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5351 5351 zfs_ioc_vdev_remove);
5352 5352 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5353 5353 zfs_ioc_vdev_set_state);
5354 5354 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5355 5355 zfs_ioc_vdev_attach);
5356 5356 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5357 5357 zfs_ioc_vdev_detach);
5358 5358 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5359 5359 zfs_ioc_vdev_setpath);
5360 5360 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5361 5361 zfs_ioc_vdev_setfru);
5362 5362 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5363 5363 zfs_ioc_pool_set_props);
5364 5364 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5365 5365 zfs_ioc_vdev_split);
5366 5366 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5367 5367 zfs_ioc_pool_reguid);
5368 5368
5369 5369 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5370 5370 zfs_ioc_pool_configs, zfs_secpolicy_none);
5371 5371 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5372 5372 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5373 5373 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5374 5374 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5375 5375 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5376 5376 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5377 5377 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5378 5378 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5379 5379
5380 5380 /*
5381 5381 * pool destroy, and export don't log the history as part of
5382 5382 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5383 5383 * does the logging of those commands.
5384 5384 */
5385 5385 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5386 5386 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5387 5387 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5388 5388 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5389 5389
5390 5390 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5391 5391 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5392 5392 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5393 5393 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5394 5394
5395 5395 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5396 5396 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5397 5397 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
|
↓ open down ↓ |
5397 lines elided |
↑ open up ↑ |
5398 5398 zfs_ioc_dsobj_to_dsname,
5399 5399 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5400 5400 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5401 5401 zfs_ioc_pool_get_history,
5402 5402 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5403 5403
5404 5404 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5405 5405 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5406 5406
5407 5407 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5408 - zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5408 + zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5409 5409 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5410 5410 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5411 5411
5412 5412 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5413 5413 zfs_ioc_space_written);
5414 5414 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5415 5415 zfs_ioc_objset_recvd_props);
5416 5416 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5417 5417 zfs_ioc_next_obj);
5418 5418 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5419 5419 zfs_ioc_get_fsacl);
5420 5420 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5421 5421 zfs_ioc_objset_stats);
5422 5422 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5423 5423 zfs_ioc_objset_zplprops);
5424 5424 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5425 5425 zfs_ioc_dataset_list_next);
5426 5426 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5427 5427 zfs_ioc_snapshot_list_next);
5428 5428 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5429 5429 zfs_ioc_send_progress);
5430 5430
5431 5431 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5432 5432 zfs_ioc_diff, zfs_secpolicy_diff);
5433 5433 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5434 5434 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5435 5435 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5436 5436 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5437 5437 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5438 5438 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5439 5439 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5440 5440 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5441 5441 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5442 5442 zfs_ioc_send, zfs_secpolicy_send);
5443 5443
5444 5444 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5445 5445 zfs_secpolicy_none);
5446 5446 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5447 5447 zfs_secpolicy_destroy);
5448 5448 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5449 5449 zfs_secpolicy_rename);
5450 5450 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5451 5451 zfs_secpolicy_recv);
5452 5452 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5453 5453 zfs_secpolicy_promote);
5454 5454 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5455 5455 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5456 5456 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5457 5457 zfs_secpolicy_set_fsacl);
5458 5458
5459 5459 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5460 5460 zfs_secpolicy_share, POOL_CHECK_NONE);
5461 5461 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5462 5462 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5463 5463 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5464 5464 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5465 5465 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5466 5466 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5467 5467 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5468 5468 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5469 5469 }
5470 5470
5471 5471 int
5472 5472 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5473 5473 zfs_ioc_poolcheck_t check)
5474 5474 {
5475 5475 spa_t *spa;
5476 5476 int error;
5477 5477
5478 5478 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5479 5479
5480 5480 if (check & POOL_CHECK_NONE)
5481 5481 return (0);
5482 5482
5483 5483 error = spa_open(name, &spa, FTAG);
5484 5484 if (error == 0) {
5485 5485 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5486 5486 error = SET_ERROR(EAGAIN);
5487 5487 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5488 5488 error = SET_ERROR(EROFS);
5489 5489 spa_close(spa, FTAG);
5490 5490 }
5491 5491 return (error);
5492 5492 }
5493 5493
5494 5494 /*
5495 5495 * Find a free minor number.
5496 5496 */
5497 5497 minor_t
5498 5498 zfsdev_minor_alloc(void)
5499 5499 {
5500 5500 static minor_t last_minor;
5501 5501 minor_t m;
5502 5502
5503 5503 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5504 5504
5505 5505 for (m = last_minor + 1; m != last_minor; m++) {
5506 5506 if (m > ZFSDEV_MAX_MINOR)
5507 5507 m = 1;
5508 5508 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5509 5509 last_minor = m;
5510 5510 return (m);
5511 5511 }
5512 5512 }
5513 5513
5514 5514 return (0);
5515 5515 }
5516 5516
5517 5517 static int
5518 5518 zfs_ctldev_init(dev_t *devp)
5519 5519 {
5520 5520 minor_t minor;
5521 5521 zfs_soft_state_t *zs;
5522 5522
5523 5523 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5524 5524 ASSERT(getminor(*devp) == 0);
5525 5525
5526 5526 minor = zfsdev_minor_alloc();
5527 5527 if (minor == 0)
5528 5528 return (SET_ERROR(ENXIO));
5529 5529
5530 5530 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5531 5531 return (SET_ERROR(EAGAIN));
5532 5532
5533 5533 *devp = makedevice(getemajor(*devp), minor);
5534 5534
5535 5535 zs = ddi_get_soft_state(zfsdev_state, minor);
5536 5536 zs->zss_type = ZSST_CTLDEV;
5537 5537 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5538 5538
5539 5539 return (0);
5540 5540 }
5541 5541
5542 5542 static void
5543 5543 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5544 5544 {
5545 5545 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5546 5546
5547 5547 zfs_onexit_destroy(zo);
5548 5548 ddi_soft_state_free(zfsdev_state, minor);
5549 5549 }
5550 5550
5551 5551 void *
5552 5552 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5553 5553 {
5554 5554 zfs_soft_state_t *zp;
5555 5555
5556 5556 zp = ddi_get_soft_state(zfsdev_state, minor);
5557 5557 if (zp == NULL || zp->zss_type != which)
5558 5558 return (NULL);
5559 5559
5560 5560 return (zp->zss_data);
5561 5561 }
5562 5562
5563 5563 static int
5564 5564 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5565 5565 {
5566 5566 int error = 0;
5567 5567
5568 5568 if (getminor(*devp) != 0)
5569 5569 return (zvol_open(devp, flag, otyp, cr));
5570 5570
5571 5571 /* This is the control device. Allocate a new minor if requested. */
5572 5572 if (flag & FEXCL) {
5573 5573 mutex_enter(&zfsdev_state_lock);
5574 5574 error = zfs_ctldev_init(devp);
5575 5575 mutex_exit(&zfsdev_state_lock);
5576 5576 }
5577 5577
5578 5578 return (error);
5579 5579 }
5580 5580
5581 5581 static int
5582 5582 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5583 5583 {
5584 5584 zfs_onexit_t *zo;
5585 5585 minor_t minor = getminor(dev);
5586 5586
5587 5587 if (minor == 0)
5588 5588 return (0);
5589 5589
5590 5590 mutex_enter(&zfsdev_state_lock);
5591 5591 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5592 5592 if (zo == NULL) {
5593 5593 mutex_exit(&zfsdev_state_lock);
5594 5594 return (zvol_close(dev, flag, otyp, cr));
5595 5595 }
5596 5596 zfs_ctldev_destroy(zo, minor);
5597 5597 mutex_exit(&zfsdev_state_lock);
5598 5598
5599 5599 return (0);
5600 5600 }
5601 5601
5602 5602 static int
5603 5603 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5604 5604 {
5605 5605 zfs_cmd_t *zc;
5606 5606 uint_t vecnum;
5607 5607 int error, rc, len;
5608 5608 minor_t minor = getminor(dev);
5609 5609 const zfs_ioc_vec_t *vec;
5610 5610 char *saved_poolname = NULL;
5611 5611 nvlist_t *innvl = NULL;
5612 5612
5613 5613 if (minor != 0 &&
5614 5614 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5615 5615 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5616 5616
5617 5617 vecnum = cmd - ZFS_IOC_FIRST;
5618 5618 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5619 5619
5620 5620 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5621 5621 return (SET_ERROR(EINVAL));
5622 5622 vec = &zfs_ioc_vec[vecnum];
5623 5623
5624 5624 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5625 5625
5626 5626 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5627 5627 if (error != 0) {
5628 5628 error = SET_ERROR(EFAULT);
5629 5629 goto out;
5630 5630 }
5631 5631
5632 5632 zc->zc_iflags = flag & FKIOCTL;
5633 5633 if (zc->zc_nvlist_src_size != 0) {
5634 5634 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5635 5635 zc->zc_iflags, &innvl);
5636 5636 if (error != 0)
5637 5637 goto out;
5638 5638 }
5639 5639
5640 5640 /*
5641 5641 * Ensure that all pool/dataset names are valid before we pass down to
5642 5642 * the lower layers.
5643 5643 */
5644 5644 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5645 5645 switch (vec->zvec_namecheck) {
5646 5646 case POOL_NAME:
5647 5647 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5648 5648 error = SET_ERROR(EINVAL);
5649 5649 else
5650 5650 error = pool_status_check(zc->zc_name,
5651 5651 vec->zvec_namecheck, vec->zvec_pool_check);
5652 5652 break;
5653 5653
5654 5654 case DATASET_NAME:
5655 5655 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5656 5656 error = SET_ERROR(EINVAL);
5657 5657 else
5658 5658 error = pool_status_check(zc->zc_name,
5659 5659 vec->zvec_namecheck, vec->zvec_pool_check);
5660 5660 break;
5661 5661
5662 5662 case NO_NAME:
5663 5663 break;
5664 5664 }
5665 5665
5666 5666
5667 5667 if (error == 0 && !(flag & FKIOCTL))
5668 5668 error = vec->zvec_secpolicy(zc, innvl, cr);
5669 5669
5670 5670 if (error != 0)
5671 5671 goto out;
5672 5672
5673 5673 /* legacy ioctls can modify zc_name */
5674 5674 len = strcspn(zc->zc_name, "/@") + 1;
5675 5675 saved_poolname = kmem_alloc(len, KM_SLEEP);
5676 5676 (void) strlcpy(saved_poolname, zc->zc_name, len);
5677 5677
5678 5678 if (vec->zvec_func != NULL) {
5679 5679 nvlist_t *outnvl;
5680 5680 int puterror = 0;
5681 5681 spa_t *spa;
5682 5682 nvlist_t *lognv = NULL;
5683 5683
5684 5684 ASSERT(vec->zvec_legacy_func == NULL);
5685 5685
5686 5686 /*
5687 5687 * Add the innvl to the lognv before calling the func,
5688 5688 * in case the func changes the innvl.
5689 5689 */
5690 5690 if (vec->zvec_allow_log) {
5691 5691 lognv = fnvlist_alloc();
5692 5692 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5693 5693 vec->zvec_name);
5694 5694 if (!nvlist_empty(innvl)) {
5695 5695 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5696 5696 innvl);
5697 5697 }
5698 5698 }
5699 5699
5700 5700 outnvl = fnvlist_alloc();
5701 5701 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5702 5702
5703 5703 if (error == 0 && vec->zvec_allow_log &&
5704 5704 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5705 5705 if (!nvlist_empty(outnvl)) {
5706 5706 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5707 5707 outnvl);
5708 5708 }
5709 5709 (void) spa_history_log_nvl(spa, lognv);
5710 5710 spa_close(spa, FTAG);
5711 5711 }
5712 5712 fnvlist_free(lognv);
5713 5713
5714 5714 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5715 5715 int smusherror = 0;
5716 5716 if (vec->zvec_smush_outnvlist) {
5717 5717 smusherror = nvlist_smush(outnvl,
5718 5718 zc->zc_nvlist_dst_size);
5719 5719 }
5720 5720 if (smusherror == 0)
5721 5721 puterror = put_nvlist(zc, outnvl);
5722 5722 }
5723 5723
5724 5724 if (puterror != 0)
5725 5725 error = puterror;
5726 5726
5727 5727 nvlist_free(outnvl);
5728 5728 } else {
5729 5729 error = vec->zvec_legacy_func(zc);
5730 5730 }
5731 5731
5732 5732 out:
5733 5733 nvlist_free(innvl);
5734 5734 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5735 5735 if (error == 0 && rc != 0)
5736 5736 error = SET_ERROR(EFAULT);
5737 5737 if (error == 0 && vec->zvec_allow_log) {
5738 5738 char *s = tsd_get(zfs_allow_log_key);
5739 5739 if (s != NULL)
5740 5740 strfree(s);
5741 5741 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5742 5742 } else {
5743 5743 if (saved_poolname != NULL)
5744 5744 strfree(saved_poolname);
5745 5745 }
5746 5746
5747 5747 kmem_free(zc, sizeof (zfs_cmd_t));
5748 5748 return (error);
5749 5749 }
5750 5750
5751 5751 static int
5752 5752 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5753 5753 {
5754 5754 if (cmd != DDI_ATTACH)
5755 5755 return (DDI_FAILURE);
5756 5756
5757 5757 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5758 5758 DDI_PSEUDO, 0) == DDI_FAILURE)
5759 5759 return (DDI_FAILURE);
5760 5760
5761 5761 zfs_dip = dip;
5762 5762
5763 5763 ddi_report_dev(dip);
5764 5764
5765 5765 return (DDI_SUCCESS);
5766 5766 }
5767 5767
5768 5768 static int
5769 5769 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5770 5770 {
5771 5771 if (spa_busy() || zfs_busy() || zvol_busy())
5772 5772 return (DDI_FAILURE);
5773 5773
5774 5774 if (cmd != DDI_DETACH)
5775 5775 return (DDI_FAILURE);
5776 5776
5777 5777 zfs_dip = NULL;
5778 5778
5779 5779 ddi_prop_remove_all(dip);
5780 5780 ddi_remove_minor_node(dip, NULL);
5781 5781
5782 5782 return (DDI_SUCCESS);
5783 5783 }
5784 5784
5785 5785 /*ARGSUSED*/
5786 5786 static int
5787 5787 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5788 5788 {
5789 5789 switch (infocmd) {
5790 5790 case DDI_INFO_DEVT2DEVINFO:
5791 5791 *result = zfs_dip;
5792 5792 return (DDI_SUCCESS);
5793 5793
5794 5794 case DDI_INFO_DEVT2INSTANCE:
5795 5795 *result = (void *)0;
5796 5796 return (DDI_SUCCESS);
5797 5797 }
5798 5798
5799 5799 return (DDI_FAILURE);
5800 5800 }
5801 5801
5802 5802 /*
5803 5803 * OK, so this is a little weird.
5804 5804 *
5805 5805 * /dev/zfs is the control node, i.e. minor 0.
5806 5806 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5807 5807 *
5808 5808 * /dev/zfs has basically nothing to do except serve up ioctls,
5809 5809 * so most of the standard driver entry points are in zvol.c.
5810 5810 */
5811 5811 static struct cb_ops zfs_cb_ops = {
5812 5812 zfsdev_open, /* open */
5813 5813 zfsdev_close, /* close */
5814 5814 zvol_strategy, /* strategy */
5815 5815 nodev, /* print */
5816 5816 zvol_dump, /* dump */
5817 5817 zvol_read, /* read */
5818 5818 zvol_write, /* write */
5819 5819 zfsdev_ioctl, /* ioctl */
5820 5820 nodev, /* devmap */
5821 5821 nodev, /* mmap */
5822 5822 nodev, /* segmap */
5823 5823 nochpoll, /* poll */
5824 5824 ddi_prop_op, /* prop_op */
5825 5825 NULL, /* streamtab */
5826 5826 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5827 5827 CB_REV, /* version */
5828 5828 nodev, /* async read */
5829 5829 nodev, /* async write */
5830 5830 };
5831 5831
5832 5832 static struct dev_ops zfs_dev_ops = {
5833 5833 DEVO_REV, /* version */
5834 5834 0, /* refcnt */
5835 5835 zfs_info, /* info */
5836 5836 nulldev, /* identify */
5837 5837 nulldev, /* probe */
5838 5838 zfs_attach, /* attach */
5839 5839 zfs_detach, /* detach */
5840 5840 nodev, /* reset */
5841 5841 &zfs_cb_ops, /* driver operations */
5842 5842 NULL, /* no bus operations */
5843 5843 NULL, /* power */
5844 5844 ddi_quiesce_not_needed, /* quiesce */
5845 5845 };
5846 5846
5847 5847 static struct modldrv zfs_modldrv = {
5848 5848 &mod_driverops,
5849 5849 "ZFS storage pool",
5850 5850 &zfs_dev_ops
5851 5851 };
5852 5852
5853 5853 static struct modlinkage modlinkage = {
5854 5854 MODREV_1,
5855 5855 (void *)&zfs_modlfs,
5856 5856 (void *)&zfs_modldrv,
5857 5857 NULL
5858 5858 };
5859 5859
5860 5860 static void
5861 5861 zfs_allow_log_destroy(void *arg)
5862 5862 {
5863 5863 char *poolname = arg;
5864 5864 strfree(poolname);
5865 5865 }
5866 5866
5867 5867 int
5868 5868 _init(void)
5869 5869 {
5870 5870 int error;
5871 5871
5872 5872 spa_init(FREAD | FWRITE);
5873 5873 zfs_init();
5874 5874 zvol_init();
5875 5875 zfs_ioctl_init();
5876 5876
5877 5877 if ((error = mod_install(&modlinkage)) != 0) {
5878 5878 zvol_fini();
5879 5879 zfs_fini();
5880 5880 spa_fini();
5881 5881 return (error);
5882 5882 }
5883 5883
5884 5884 tsd_create(&zfs_fsyncer_key, NULL);
5885 5885 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5886 5886 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5887 5887
5888 5888 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5889 5889 ASSERT(error == 0);
5890 5890 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5891 5891
5892 5892 return (0);
5893 5893 }
5894 5894
5895 5895 int
5896 5896 _fini(void)
5897 5897 {
5898 5898 int error;
5899 5899
5900 5900 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5901 5901 return (SET_ERROR(EBUSY));
5902 5902
5903 5903 if ((error = mod_remove(&modlinkage)) != 0)
5904 5904 return (error);
5905 5905
5906 5906 zvol_fini();
5907 5907 zfs_fini();
5908 5908 spa_fini();
5909 5909 if (zfs_nfsshare_inited)
5910 5910 (void) ddi_modclose(nfs_mod);
5911 5911 if (zfs_smbshare_inited)
5912 5912 (void) ddi_modclose(smbsrv_mod);
5913 5913 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5914 5914 (void) ddi_modclose(sharefs_mod);
5915 5915
5916 5916 tsd_destroy(&zfs_fsyncer_key);
5917 5917 ldi_ident_release(zfs_li);
5918 5918 zfs_li = NULL;
5919 5919 mutex_destroy(&zfs_share_lock);
5920 5920
5921 5921 return (error);
5922 5922 }
5923 5923
5924 5924 int
5925 5925 _info(struct modinfo *modinfop)
5926 5926 {
5927 5927 return (mod_info(&modlinkage, modinfop));
5928 5928 }
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