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--- old/usr/src/uts/common/io/comstar/lu/stmf_sbd/sbd.c
+++ new/usr/src/uts/common/io/comstar/lu/stmf_sbd/sbd.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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
25 25 * Copyright (c) 2013 by Delphix. All rights reserved.
26 26 */
27 27
28 28 #include <sys/sysmacros.h>
29 29 #include <sys/conf.h>
30 30 #include <sys/file.h>
31 31 #include <sys/ddi.h>
32 32 #include <sys/sunddi.h>
33 33 #include <sys/modctl.h>
34 34 #include <sys/scsi/scsi.h>
35 35 #include <sys/scsi/impl/scsi_reset_notify.h>
36 36 #include <sys/disp.h>
37 37 #include <sys/byteorder.h>
38 38 #include <sys/pathname.h>
39 39 #include <sys/atomic.h>
40 40 #include <sys/nvpair.h>
41 41 #include <sys/fs/zfs.h>
42 42 #include <sys/sdt.h>
43 43 #include <sys/dkio.h>
44 44 #include <sys/zfs_ioctl.h>
45 45
46 46 #include <sys/stmf.h>
47 47 #include <sys/lpif.h>
48 48 #include <sys/stmf_ioctl.h>
49 49 #include <sys/stmf_sbd_ioctl.h>
50 50
51 51 #include "stmf_sbd.h"
52 52 #include "sbd_impl.h"
53 53
54 54 #define SBD_IS_ZVOL(zvol) (strncmp("/dev/zvol", zvol, 9))
55 55
56 56 extern sbd_status_t sbd_pgr_meta_init(sbd_lu_t *sl);
57 57 extern sbd_status_t sbd_pgr_meta_load(sbd_lu_t *sl);
58 58 extern void sbd_pgr_reset(sbd_lu_t *sl);
59 59
60 60 static int sbd_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
61 61 void **result);
62 62 static int sbd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
63 63 static int sbd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
64 64 static int sbd_open(dev_t *devp, int flag, int otype, cred_t *credp);
65 65 static int sbd_close(dev_t dev, int flag, int otype, cred_t *credp);
66 66 static int stmf_sbd_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
67 67 cred_t *credp, int *rval);
68 68 void sbd_lp_cb(stmf_lu_provider_t *lp, int cmd, void *arg, uint32_t flags);
69 69 stmf_status_t sbd_proxy_reg_lu(uint8_t *luid, void *proxy_reg_arg,
70 70 uint32_t proxy_reg_arg_len);
71 71 stmf_status_t sbd_proxy_dereg_lu(uint8_t *luid, void *proxy_reg_arg,
72 72 uint32_t proxy_reg_arg_len);
73 73 stmf_status_t sbd_proxy_msg(uint8_t *luid, void *proxy_arg,
74 74 uint32_t proxy_arg_len, uint32_t type);
75 75 int sbd_create_register_lu(sbd_create_and_reg_lu_t *slu, int struct_sz,
76 76 uint32_t *err_ret);
77 77 int sbd_create_standby_lu(sbd_create_standby_lu_t *slu, uint32_t *err_ret);
78 78 int sbd_set_lu_standby(sbd_set_lu_standby_t *stlu, uint32_t *err_ret);
79 79 int sbd_import_lu(sbd_import_lu_t *ilu, int struct_sz, uint32_t *err_ret,
80 80 int no_register, sbd_lu_t **slr);
81 81 int sbd_import_active_lu(sbd_import_lu_t *ilu, sbd_lu_t *sl, uint32_t *err_ret);
82 82 int sbd_delete_lu(sbd_delete_lu_t *dlu, int struct_sz, uint32_t *err_ret);
83 83 int sbd_modify_lu(sbd_modify_lu_t *mlu, int struct_sz, uint32_t *err_ret);
84 84 int sbd_set_global_props(sbd_global_props_t *mlu, int struct_sz,
85 85 uint32_t *err_ret);
86 86 int sbd_get_global_props(sbd_global_props_t *oslp, uint32_t oslp_sz,
87 87 uint32_t *err_ret);
88 88 int sbd_get_lu_props(sbd_lu_props_t *islp, uint32_t islp_sz,
89 89 sbd_lu_props_t *oslp, uint32_t oslp_sz, uint32_t *err_ret);
90 90 static char *sbd_get_zvol_name(sbd_lu_t *);
91 91 static int sbd_get_unmap_props(sbd_unmap_props_t *sup, sbd_unmap_props_t *osup,
92 92 uint32_t *err_ret);
93 93 sbd_status_t sbd_create_zfs_meta_object(sbd_lu_t *sl);
94 94 sbd_status_t sbd_open_zfs_meta(sbd_lu_t *sl);
95 95 sbd_status_t sbd_read_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz,
96 96 uint64_t off);
97 97 sbd_status_t sbd_write_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz,
98 98 uint64_t off);
99 99 sbd_status_t sbd_update_zfs_prop(sbd_lu_t *sl);
100 100 int sbd_is_zvol(char *path);
101 101 int sbd_zvolget(char *zvol_name, char **comstarprop);
102 102 int sbd_zvolset(char *zvol_name, char *comstarprop);
103 103 char sbd_ctoi(char c);
104 104 void sbd_close_lu(sbd_lu_t *sl);
105 105
106 106 static ldi_ident_t sbd_zfs_ident;
107 107 static stmf_lu_provider_t *sbd_lp;
108 108 static sbd_lu_t *sbd_lu_list = NULL;
109 109 static kmutex_t sbd_lock;
110 110 static dev_info_t *sbd_dip;
111 111 static uint32_t sbd_lu_count = 0;
112 112
113 113 /* Global property settings for the logical unit */
114 114 char sbd_vendor_id[] = "SUN ";
115 115 char sbd_product_id[] = "COMSTAR ";
116 116 char sbd_revision[] = "1.0 ";
117 117 char *sbd_mgmt_url = NULL;
118 118 uint16_t sbd_mgmt_url_alloc_size = 0;
119 119 krwlock_t sbd_global_prop_lock;
120 120
121 121 static char sbd_name[] = "sbd";
122 122
123 123 static struct cb_ops sbd_cb_ops = {
124 124 sbd_open, /* open */
125 125 sbd_close, /* close */
126 126 nodev, /* strategy */
127 127 nodev, /* print */
128 128 nodev, /* dump */
129 129 nodev, /* read */
130 130 nodev, /* write */
131 131 stmf_sbd_ioctl, /* ioctl */
132 132 nodev, /* devmap */
133 133 nodev, /* mmap */
134 134 nodev, /* segmap */
135 135 nochpoll, /* chpoll */
136 136 ddi_prop_op, /* cb_prop_op */
137 137 0, /* streamtab */
138 138 D_NEW | D_MP, /* cb_flag */
139 139 CB_REV, /* rev */
140 140 nodev, /* aread */
141 141 nodev /* awrite */
142 142 };
143 143
144 144 static struct dev_ops sbd_ops = {
145 145 DEVO_REV,
146 146 0,
147 147 sbd_getinfo,
148 148 nulldev, /* identify */
149 149 nulldev, /* probe */
150 150 sbd_attach,
151 151 sbd_detach,
152 152 nodev, /* reset */
153 153 &sbd_cb_ops,
154 154 NULL, /* bus_ops */
155 155 NULL /* power */
156 156 };
157 157
158 158 #define SBD_NAME "COMSTAR SBD"
159 159
160 160 static struct modldrv modldrv = {
161 161 &mod_driverops,
162 162 SBD_NAME,
163 163 &sbd_ops
164 164 };
165 165
166 166 static struct modlinkage modlinkage = {
167 167 MODREV_1,
168 168 &modldrv,
169 169 NULL
170 170 };
171 171
172 172 int
173 173 _init(void)
174 174 {
175 175 int ret;
176 176
177 177 ret = mod_install(&modlinkage);
178 178 if (ret)
179 179 return (ret);
180 180 sbd_lp = (stmf_lu_provider_t *)stmf_alloc(STMF_STRUCT_LU_PROVIDER,
181 181 0, 0);
182 182 sbd_lp->lp_lpif_rev = LPIF_REV_2;
183 183 sbd_lp->lp_instance = 0;
184 184 sbd_lp->lp_name = sbd_name;
185 185 sbd_lp->lp_cb = sbd_lp_cb;
186 186 sbd_lp->lp_alua_support = 1;
187 187 sbd_lp->lp_proxy_msg = sbd_proxy_msg;
188 188 sbd_zfs_ident = ldi_ident_from_anon();
189 189
190 190 if (stmf_register_lu_provider(sbd_lp) != STMF_SUCCESS) {
191 191 (void) mod_remove(&modlinkage);
192 192 stmf_free(sbd_lp);
193 193 return (EINVAL);
194 194 }
195 195 mutex_init(&sbd_lock, NULL, MUTEX_DRIVER, NULL);
196 196 rw_init(&sbd_global_prop_lock, NULL, RW_DRIVER, NULL);
197 197 return (0);
198 198 }
199 199
200 200 int
201 201 _fini(void)
202 202 {
203 203 int ret;
204 204
205 205 /*
206 206 * If we have registered lus, then make sure they are all offline
207 207 * if so then deregister them. This should drop the sbd_lu_count
208 208 * to zero.
209 209 */
210 210 if (sbd_lu_count) {
211 211 sbd_lu_t *slu;
212 212
213 213 /* See if all of them are offline */
214 214 mutex_enter(&sbd_lock);
215 215 for (slu = sbd_lu_list; slu != NULL; slu = slu->sl_next) {
216 216 if ((slu->sl_state != STMF_STATE_OFFLINE) ||
217 217 slu->sl_state_not_acked) {
218 218 mutex_exit(&sbd_lock);
219 219 return (EBUSY);
220 220 }
221 221 }
222 222 mutex_exit(&sbd_lock);
223 223
224 224 #if 0
225 225 /* ok start deregistering them */
226 226 while (sbd_lu_list) {
227 227 sbd_store_t *sst = sbd_lu_list->sl_sst;
228 228 if (sst->sst_deregister_lu(sst) != STMF_SUCCESS)
229 229 return (EBUSY);
230 230 }
231 231 #endif
232 232 return (EBUSY);
233 233 }
234 234 if (stmf_deregister_lu_provider(sbd_lp) != STMF_SUCCESS)
235 235 return (EBUSY);
236 236 ret = mod_remove(&modlinkage);
237 237 if (ret != 0) {
238 238 (void) stmf_register_lu_provider(sbd_lp);
239 239 return (ret);
240 240 }
241 241 stmf_free(sbd_lp);
242 242 mutex_destroy(&sbd_lock);
243 243 rw_destroy(&sbd_global_prop_lock);
244 244 ldi_ident_release(sbd_zfs_ident);
245 245 return (0);
246 246 }
247 247
248 248 int
249 249 _info(struct modinfo *modinfop)
250 250 {
251 251 return (mod_info(&modlinkage, modinfop));
252 252 }
253 253
254 254 /* ARGSUSED */
255 255 static int
256 256 sbd_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
257 257 {
258 258 switch (cmd) {
259 259 case DDI_INFO_DEVT2DEVINFO:
260 260 *result = sbd_dip;
261 261 break;
262 262 case DDI_INFO_DEVT2INSTANCE:
263 263 *result = (void *)(uintptr_t)ddi_get_instance(sbd_dip);
264 264 break;
265 265 default:
266 266 return (DDI_FAILURE);
267 267 }
268 268
269 269 return (DDI_SUCCESS);
270 270 }
271 271
272 272 static int
273 273 sbd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
274 274 {
275 275 switch (cmd) {
276 276 case DDI_ATTACH:
277 277 sbd_dip = dip;
278 278
279 279 if (ddi_create_minor_node(dip, "admin", S_IFCHR, 0,
280 280 DDI_NT_STMF_LP, 0) != DDI_SUCCESS) {
281 281 break;
282 282 }
283 283 ddi_report_dev(dip);
284 284 return (DDI_SUCCESS);
285 285 }
286 286
287 287 return (DDI_FAILURE);
288 288 }
289 289
290 290 static int
291 291 sbd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
292 292 {
293 293 switch (cmd) {
294 294 case DDI_DETACH:
295 295 ddi_remove_minor_node(dip, 0);
296 296 return (DDI_SUCCESS);
297 297 }
298 298
299 299 return (DDI_FAILURE);
300 300 }
301 301
302 302 /* ARGSUSED */
303 303 static int
304 304 sbd_open(dev_t *devp, int flag, int otype, cred_t *credp)
305 305 {
306 306 if (otype != OTYP_CHR)
307 307 return (EINVAL);
308 308 return (0);
309 309 }
310 310
311 311 /* ARGSUSED */
312 312 static int
313 313 sbd_close(dev_t dev, int flag, int otype, cred_t *credp)
314 314 {
315 315 return (0);
316 316 }
317 317
318 318 /* ARGSUSED */
319 319 static int
320 320 stmf_sbd_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
321 321 cred_t *credp, int *rval)
322 322 {
323 323 stmf_iocdata_t *iocd;
324 324 void *ibuf = NULL;
325 325 void *obuf = NULL;
326 326 sbd_lu_t *nsl;
327 327 int i;
328 328 int ret;
329 329
330 330 if (drv_priv(credp) != 0) {
331 331 return (EPERM);
332 332 }
333 333
334 334 ret = stmf_copyin_iocdata(data, mode, &iocd, &ibuf, &obuf);
335 335 if (ret)
336 336 return (ret);
337 337 iocd->stmf_error = 0;
338 338
339 339 switch (cmd) {
340 340 case SBD_IOCTL_CREATE_AND_REGISTER_LU:
341 341 if (iocd->stmf_ibuf_size <
342 342 (sizeof (sbd_create_and_reg_lu_t) - 8)) {
343 343 ret = EFAULT;
344 344 break;
345 345 }
346 346 if ((iocd->stmf_obuf_size == 0) ||
347 347 (iocd->stmf_obuf_size > iocd->stmf_ibuf_size)) {
348 348 ret = EINVAL;
349 349 break;
350 350 }
351 351 ret = sbd_create_register_lu((sbd_create_and_reg_lu_t *)
352 352 ibuf, iocd->stmf_ibuf_size, &iocd->stmf_error);
353 353 bcopy(ibuf, obuf, iocd->stmf_obuf_size);
354 354 break;
355 355 case SBD_IOCTL_SET_LU_STANDBY:
356 356 if (iocd->stmf_ibuf_size < sizeof (sbd_set_lu_standby_t)) {
357 357 ret = EFAULT;
358 358 break;
359 359 }
360 360 if (iocd->stmf_obuf_size) {
361 361 ret = EINVAL;
362 362 break;
363 363 }
364 364 ret = sbd_set_lu_standby((sbd_set_lu_standby_t *)ibuf,
365 365 &iocd->stmf_error);
366 366 break;
367 367 case SBD_IOCTL_IMPORT_LU:
368 368 if (iocd->stmf_ibuf_size <
369 369 (sizeof (sbd_import_lu_t) - 8)) {
370 370 ret = EFAULT;
371 371 break;
372 372 }
373 373 if ((iocd->stmf_obuf_size == 0) ||
374 374 (iocd->stmf_obuf_size > iocd->stmf_ibuf_size)) {
375 375 ret = EINVAL;
376 376 break;
377 377 }
378 378 ret = sbd_import_lu((sbd_import_lu_t *)ibuf,
379 379 iocd->stmf_ibuf_size, &iocd->stmf_error, 0, NULL);
380 380 bcopy(ibuf, obuf, iocd->stmf_obuf_size);
381 381 break;
382 382 case SBD_IOCTL_DELETE_LU:
383 383 if (iocd->stmf_ibuf_size < (sizeof (sbd_delete_lu_t) - 8)) {
384 384 ret = EFAULT;
385 385 break;
386 386 }
387 387 if (iocd->stmf_obuf_size) {
388 388 ret = EINVAL;
389 389 break;
390 390 }
391 391 ret = sbd_delete_lu((sbd_delete_lu_t *)ibuf,
392 392 iocd->stmf_ibuf_size, &iocd->stmf_error);
393 393 break;
394 394 case SBD_IOCTL_MODIFY_LU:
395 395 if (iocd->stmf_ibuf_size < (sizeof (sbd_modify_lu_t) - 8)) {
396 396 ret = EFAULT;
397 397 break;
398 398 }
399 399 if (iocd->stmf_obuf_size) {
400 400 ret = EINVAL;
401 401 break;
402 402 }
403 403 ret = sbd_modify_lu((sbd_modify_lu_t *)ibuf,
404 404 iocd->stmf_ibuf_size, &iocd->stmf_error);
405 405 break;
406 406 case SBD_IOCTL_SET_GLOBAL_LU:
407 407 if (iocd->stmf_ibuf_size < (sizeof (sbd_global_props_t) - 8)) {
408 408 ret = EFAULT;
409 409 break;
410 410 }
411 411 if (iocd->stmf_obuf_size) {
412 412 ret = EINVAL;
413 413 break;
414 414 }
415 415 ret = sbd_set_global_props((sbd_global_props_t *)ibuf,
416 416 iocd->stmf_ibuf_size, &iocd->stmf_error);
417 417 break;
418 418 case SBD_IOCTL_GET_GLOBAL_LU:
419 419 if (iocd->stmf_ibuf_size) {
420 420 ret = EINVAL;
421 421 break;
422 422 }
423 423 if (iocd->stmf_obuf_size < sizeof (sbd_global_props_t)) {
424 424 ret = EINVAL;
425 425 break;
426 426 }
427 427 ret = sbd_get_global_props((sbd_global_props_t *)obuf,
428 428 iocd->stmf_obuf_size, &iocd->stmf_error);
429 429 break;
430 430 case SBD_IOCTL_GET_LU_PROPS:
431 431 if (iocd->stmf_ibuf_size < (sizeof (sbd_lu_props_t) - 8)) {
432 432 ret = EFAULT;
433 433 break;
434 434 }
435 435 if (iocd->stmf_obuf_size < sizeof (sbd_lu_props_t)) {
436 436 ret = EINVAL;
437 437 break;
438 438 }
439 439 ret = sbd_get_lu_props((sbd_lu_props_t *)ibuf,
440 440 iocd->stmf_ibuf_size, (sbd_lu_props_t *)obuf,
441 441 iocd->stmf_obuf_size, &iocd->stmf_error);
442 442 break;
443 443 case SBD_IOCTL_GET_LU_LIST:
444 444 mutex_enter(&sbd_lock);
445 445 iocd->stmf_obuf_max_nentries = sbd_lu_count;
446 446 iocd->stmf_obuf_nentries = min((iocd->stmf_obuf_size >> 4),
447 447 sbd_lu_count);
448 448 for (nsl = sbd_lu_list, i = 0; nsl &&
449 449 (i < iocd->stmf_obuf_nentries); i++, nsl = nsl->sl_next) {
450 450 bcopy(nsl->sl_device_id + 4,
451 451 &(((uint8_t *)obuf)[i << 4]), 16);
452 452 }
453 453 mutex_exit(&sbd_lock);
454 454 ret = 0;
455 455 iocd->stmf_error = 0;
456 456 break;
457 457 case SBD_IOCTL_GET_UNMAP_PROPS:
458 458 if (iocd->stmf_ibuf_size < sizeof (sbd_unmap_props_t)) {
459 459 ret = EFAULT;
460 460 break;
461 461 }
462 462 if (iocd->stmf_obuf_size < sizeof (sbd_unmap_props_t)) {
463 463 ret = EINVAL;
464 464 break;
465 465 }
466 466 ret = sbd_get_unmap_props((sbd_unmap_props_t *)ibuf,
467 467 (sbd_unmap_props_t *)obuf, &iocd->stmf_error);
468 468 break;
469 469 default:
470 470 ret = ENOTTY;
471 471 }
472 472
473 473 if (ret == 0) {
474 474 ret = stmf_copyout_iocdata(data, mode, iocd, obuf);
475 475 } else if (iocd->stmf_error) {
476 476 (void) stmf_copyout_iocdata(data, mode, iocd, obuf);
477 477 }
478 478 if (obuf) {
479 479 kmem_free(obuf, iocd->stmf_obuf_size);
480 480 obuf = NULL;
481 481 }
482 482 if (ibuf) {
483 483 kmem_free(ibuf, iocd->stmf_ibuf_size);
484 484 ibuf = NULL;
485 485 }
486 486 kmem_free(iocd, sizeof (stmf_iocdata_t));
487 487 return (ret);
488 488 }
489 489
490 490 /* ARGSUSED */
491 491 void
492 492 sbd_lp_cb(stmf_lu_provider_t *lp, int cmd, void *arg, uint32_t flags)
493 493 {
494 494 nvpair_t *np;
495 495 char *s;
496 496 sbd_import_lu_t *ilu;
497 497 uint32_t ilu_sz;
498 498 uint32_t struct_sz;
499 499 uint32_t err_ret;
500 500 int iret;
501 501
502 502 if ((cmd != STMF_PROVIDER_DATA_UPDATED) || (arg == NULL)) {
503 503 return;
504 504 }
505 505
506 506 if ((flags & (STMF_PCB_STMF_ONLINING | STMF_PCB_PREG_COMPLETE)) == 0) {
507 507 return;
508 508 }
509 509
510 510 np = NULL;
511 511 ilu_sz = 1024;
512 512 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP);
513 513 while ((np = nvlist_next_nvpair((nvlist_t *)arg, np)) != NULL) {
514 514 if (nvpair_type(np) != DATA_TYPE_STRING) {
515 515 continue;
516 516 }
517 517 if (nvpair_value_string(np, &s) != 0) {
518 518 continue;
519 519 }
520 520 struct_sz = max(8, strlen(s) + 1);
521 521 struct_sz += sizeof (sbd_import_lu_t) - 8;
522 522 if (struct_sz > ilu_sz) {
523 523 kmem_free(ilu, ilu_sz);
524 524 ilu_sz = struct_sz + 32;
525 525 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP);
526 526 }
527 527 ilu->ilu_struct_size = struct_sz;
528 528 (void) strcpy(ilu->ilu_meta_fname, s);
529 529 iret = sbd_import_lu(ilu, struct_sz, &err_ret, 0, NULL);
530 530 if (iret) {
531 531 stmf_trace(0, "sbd_lp_cb: import_lu failed, ret = %d, "
532 532 "err_ret = %d", iret, err_ret);
533 533 } else {
534 534 stmf_trace(0, "Imported the LU %s", nvpair_name(np));
535 535 }
536 536 }
537 537
538 538 if (ilu) {
539 539 kmem_free(ilu, ilu_sz);
540 540 ilu = NULL;
541 541 }
542 542 }
543 543
544 544 sbd_status_t
545 545 sbd_link_lu(sbd_lu_t *sl)
546 546 {
547 547 sbd_lu_t *nsl;
548 548
549 549 mutex_enter(&sbd_lock);
550 550 mutex_enter(&sl->sl_lock);
551 551 ASSERT(sl->sl_trans_op != SL_OP_NONE);
552 552
553 553 if (sl->sl_flags & SL_LINKED) {
554 554 mutex_exit(&sbd_lock);
555 555 mutex_exit(&sl->sl_lock);
556 556 return (SBD_ALREADY);
557 557 }
558 558 for (nsl = sbd_lu_list; nsl; nsl = nsl->sl_next) {
559 559 if (strcmp(nsl->sl_name, sl->sl_name) == 0)
560 560 break;
561 561 }
562 562 if (nsl) {
563 563 mutex_exit(&sbd_lock);
564 564 mutex_exit(&sl->sl_lock);
565 565 return (SBD_ALREADY);
566 566 }
567 567 sl->sl_next = sbd_lu_list;
568 568 sbd_lu_list = sl;
569 569 sl->sl_flags |= SL_LINKED;
570 570 mutex_exit(&sbd_lock);
571 571 mutex_exit(&sl->sl_lock);
572 572 return (SBD_SUCCESS);
573 573 }
574 574
575 575 void
576 576 sbd_unlink_lu(sbd_lu_t *sl)
577 577 {
578 578 sbd_lu_t **ppnsl;
579 579
580 580 mutex_enter(&sbd_lock);
581 581 mutex_enter(&sl->sl_lock);
582 582 ASSERT(sl->sl_trans_op != SL_OP_NONE);
583 583
584 584 ASSERT(sl->sl_flags & SL_LINKED);
585 585 for (ppnsl = &sbd_lu_list; *ppnsl; ppnsl = &((*ppnsl)->sl_next)) {
586 586 if (*ppnsl == sl)
587 587 break;
588 588 }
589 589 ASSERT(*ppnsl);
590 590 *ppnsl = (*ppnsl)->sl_next;
591 591 sl->sl_flags &= ~SL_LINKED;
592 592 mutex_exit(&sbd_lock);
593 593 mutex_exit(&sl->sl_lock);
594 594 }
595 595
596 596 sbd_status_t
597 597 sbd_find_and_lock_lu(uint8_t *guid, uint8_t *meta_name, uint8_t op,
598 598 sbd_lu_t **ppsl)
599 599 {
600 600 sbd_lu_t *sl;
601 601 int found = 0;
602 602 sbd_status_t sret;
603 603
604 604 mutex_enter(&sbd_lock);
605 605 for (sl = sbd_lu_list; sl; sl = sl->sl_next) {
606 606 if (guid) {
607 607 found = bcmp(sl->sl_device_id + 4, guid, 16) == 0;
608 608 } else {
609 609 found = strcmp(sl->sl_name, (char *)meta_name) == 0;
610 610 }
611 611 if (found)
612 612 break;
613 613 }
614 614 if (!found) {
615 615 mutex_exit(&sbd_lock);
616 616 return (SBD_NOT_FOUND);
617 617 }
618 618 mutex_enter(&sl->sl_lock);
619 619 if (sl->sl_trans_op == SL_OP_NONE) {
620 620 sl->sl_trans_op = op;
621 621 *ppsl = sl;
622 622 sret = SBD_SUCCESS;
623 623 } else {
624 624 sret = SBD_BUSY;
625 625 }
626 626 mutex_exit(&sl->sl_lock);
627 627 mutex_exit(&sbd_lock);
628 628 return (sret);
629 629 }
630 630
631 631 sbd_status_t
632 632 sbd_read_meta(sbd_lu_t *sl, uint64_t offset, uint64_t size, uint8_t *buf)
633 633 {
634 634 uint64_t meta_align;
635 635 uint64_t starting_off;
636 636 uint64_t data_off;
637 637 uint64_t ending_off;
638 638 uint64_t io_size;
639 639 uint8_t *io_buf;
640 640 vnode_t *vp;
641 641 sbd_status_t ret;
642 642 ssize_t resid;
643 643 int vret;
644 644
645 645 ASSERT(sl->sl_flags & SL_META_OPENED);
646 646 if (sl->sl_flags & SL_SHARED_META) {
647 647 meta_align = (((uint64_t)1) << sl->sl_data_blocksize_shift) - 1;
648 648 vp = sl->sl_data_vp;
649 649 ASSERT(vp);
650 650 } else {
651 651 meta_align = (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1;
652 652 if ((sl->sl_flags & SL_ZFS_META) == 0) {
653 653 vp = sl->sl_meta_vp;
654 654 ASSERT(vp);
655 655 }
656 656 }
657 657 starting_off = offset & ~(meta_align);
658 658 data_off = offset & meta_align;
659 659 ending_off = (offset + size + meta_align) & (~meta_align);
660 660 if (ending_off > sl->sl_meta_size_used) {
661 661 bzero(buf, size);
662 662 if (starting_off >= sl->sl_meta_size_used) {
663 663 return (SBD_SUCCESS);
664 664 }
665 665 ending_off = (sl->sl_meta_size_used + meta_align) &
666 666 (~meta_align);
667 667 if (size > (ending_off - (starting_off + data_off))) {
668 668 size = ending_off - (starting_off + data_off);
669 669 }
670 670 }
671 671 io_size = ending_off - starting_off;
672 672 io_buf = (uint8_t *)kmem_zalloc(io_size, KM_SLEEP);
673 673 ASSERT((starting_off + io_size) <= sl->sl_total_meta_size);
674 674
675 675 /*
676 676 * Don't proceed if the device has been closed
677 677 * This can occur on an access state change to standby or
678 678 * a delete. The writer lock is acquired before closing the
679 679 * lu. If importing, reading the metadata is valid, hence
680 680 * the check on SL_OP_IMPORT_LU.
681 681 */
682 682 rw_enter(&sl->sl_access_state_lock, RW_READER);
683 683 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0 &&
684 684 sl->sl_trans_op != SL_OP_IMPORT_LU) {
685 685 rw_exit(&sl->sl_access_state_lock);
686 686 ret = SBD_FILEIO_FAILURE;
687 687 goto sbd_read_meta_failure;
688 688 }
689 689 if (sl->sl_flags & SL_ZFS_META) {
690 690 if ((ret = sbd_read_zfs_meta(sl, io_buf, io_size,
691 691 starting_off)) != SBD_SUCCESS) {
692 692 rw_exit(&sl->sl_access_state_lock);
693 693 goto sbd_read_meta_failure;
694 694 }
695 695 } else {
696 696 vret = vn_rdwr(UIO_READ, vp, (caddr_t)io_buf, (ssize_t)io_size,
697 697 (offset_t)starting_off, UIO_SYSSPACE, FRSYNC,
698 698 RLIM64_INFINITY, CRED(), &resid);
699 699
700 700 if (vret || resid) {
701 701 ret = SBD_FILEIO_FAILURE | vret;
702 702 rw_exit(&sl->sl_access_state_lock);
703 703 goto sbd_read_meta_failure;
704 704 }
705 705 }
706 706 rw_exit(&sl->sl_access_state_lock);
707 707
708 708 bcopy(io_buf + data_off, buf, size);
709 709 ret = SBD_SUCCESS;
710 710
711 711 sbd_read_meta_failure:
712 712 kmem_free(io_buf, io_size);
713 713 return (ret);
714 714 }
715 715
716 716 sbd_status_t
717 717 sbd_write_meta(sbd_lu_t *sl, uint64_t offset, uint64_t size, uint8_t *buf)
718 718 {
719 719 uint64_t meta_align;
720 720 uint64_t starting_off;
721 721 uint64_t data_off;
722 722 uint64_t ending_off;
723 723 uint64_t io_size;
724 724 uint8_t *io_buf;
725 725 vnode_t *vp;
726 726 sbd_status_t ret;
727 727 ssize_t resid;
728 728 int vret;
729 729
730 730 ASSERT(sl->sl_flags & SL_META_OPENED);
731 731 if (sl->sl_flags & SL_SHARED_META) {
732 732 meta_align = (((uint64_t)1) << sl->sl_data_blocksize_shift) - 1;
733 733 vp = sl->sl_data_vp;
734 734 ASSERT(vp);
735 735 } else {
736 736 meta_align = (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1;
737 737 if ((sl->sl_flags & SL_ZFS_META) == 0) {
738 738 vp = sl->sl_meta_vp;
739 739 ASSERT(vp);
740 740 }
741 741 }
742 742 starting_off = offset & ~(meta_align);
743 743 data_off = offset & meta_align;
744 744 ending_off = (offset + size + meta_align) & (~meta_align);
745 745 io_size = ending_off - starting_off;
746 746 io_buf = (uint8_t *)kmem_zalloc(io_size, KM_SLEEP);
747 747 ret = sbd_read_meta(sl, starting_off, io_size, io_buf);
748 748 if (ret != SBD_SUCCESS) {
749 749 goto sbd_write_meta_failure;
750 750 }
751 751 bcopy(buf, io_buf + data_off, size);
752 752 /*
753 753 * Don't proceed if the device has been closed
754 754 * This can occur on an access state change to standby or
755 755 * a delete. The writer lock is acquired before closing the
756 756 * lu. If importing, reading the metadata is valid, hence
757 757 * the check on SL_OP_IMPORT_LU.
758 758 */
759 759 rw_enter(&sl->sl_access_state_lock, RW_READER);
760 760 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0 &&
761 761 sl->sl_trans_op != SL_OP_IMPORT_LU) {
762 762 rw_exit(&sl->sl_access_state_lock);
763 763 ret = SBD_FILEIO_FAILURE;
764 764 goto sbd_write_meta_failure;
765 765 }
766 766 if (sl->sl_flags & SL_ZFS_META) {
767 767 if ((ret = sbd_write_zfs_meta(sl, io_buf, io_size,
768 768 starting_off)) != SBD_SUCCESS) {
769 769 rw_exit(&sl->sl_access_state_lock);
770 770 goto sbd_write_meta_failure;
771 771 }
772 772 } else {
773 773 vret = vn_rdwr(UIO_WRITE, vp, (caddr_t)io_buf, (ssize_t)io_size,
774 774 (offset_t)starting_off, UIO_SYSSPACE, FDSYNC,
775 775 RLIM64_INFINITY, CRED(), &resid);
776 776
777 777 if (vret || resid) {
778 778 ret = SBD_FILEIO_FAILURE | vret;
779 779 rw_exit(&sl->sl_access_state_lock);
780 780 goto sbd_write_meta_failure;
781 781 }
782 782 }
783 783 rw_exit(&sl->sl_access_state_lock);
784 784
785 785 ret = SBD_SUCCESS;
786 786
787 787 sbd_write_meta_failure:
788 788 kmem_free(io_buf, io_size);
789 789 return (ret);
790 790 }
791 791
792 792 uint8_t
793 793 sbd_calc_sum(uint8_t *buf, int size)
794 794 {
795 795 uint8_t s = 0;
796 796
797 797 while (size > 0)
798 798 s += buf[--size];
799 799
800 800 return (s);
801 801 }
802 802
803 803 uint8_t
804 804 sbd_calc_section_sum(sm_section_hdr_t *sm, uint32_t sz)
805 805 {
806 806 uint8_t s, o;
807 807
808 808 o = sm->sms_chksum;
809 809 sm->sms_chksum = 0;
810 810 s = sbd_calc_sum((uint8_t *)sm, sz);
811 811 sm->sms_chksum = o;
812 812
813 813 return (s);
814 814 }
815 815
816 816 uint32_t
817 817 sbd_strlen(char *str, uint32_t maxlen)
818 818 {
819 819 uint32_t i;
820 820
821 821 for (i = 0; i < maxlen; i++) {
822 822 if (str[i] == 0)
823 823 return (i);
824 824 }
825 825 return (i);
826 826 }
827 827
828 828 void
829 829 sbd_swap_meta_start(sbd_meta_start_t *sm)
830 830 {
831 831 if (sm->sm_magic == SBD_MAGIC)
832 832 return;
833 833 sm->sm_magic = BSWAP_64(sm->sm_magic);
834 834 sm->sm_meta_size = BSWAP_64(sm->sm_meta_size);
835 835 sm->sm_meta_size_used = BSWAP_64(sm->sm_meta_size_used);
836 836 sm->sm_ver_major = BSWAP_16(sm->sm_ver_major);
837 837 sm->sm_ver_minor = BSWAP_16(sm->sm_ver_minor);
838 838 sm->sm_ver_subminor = BSWAP_16(sm->sm_ver_subminor);
839 839 }
840 840
841 841 void
842 842 sbd_swap_section_hdr(sm_section_hdr_t *sm)
843 843 {
844 844 if (sm->sms_data_order == SMS_DATA_ORDER)
845 845 return;
846 846 sm->sms_offset = BSWAP_64(sm->sms_offset);
847 847 sm->sms_size = BSWAP_32(sm->sms_size);
848 848 sm->sms_id = BSWAP_16(sm->sms_id);
849 849 sm->sms_chksum += SMS_DATA_ORDER - sm->sms_data_order;
850 850 sm->sms_data_order = SMS_DATA_ORDER;
851 851 }
852 852
853 853 void
854 854 sbd_swap_lu_info_1_0(sbd_lu_info_1_0_t *sli)
855 855 {
856 856 sbd_swap_section_hdr(&sli->sli_sms_header);
857 857 if (sli->sli_data_order == SMS_DATA_ORDER)
858 858 return;
859 859 sli->sli_sms_header.sms_chksum += SMS_DATA_ORDER - sli->sli_data_order;
860 860 sli->sli_data_order = SMS_DATA_ORDER;
861 861 sli->sli_total_store_size = BSWAP_64(sli->sli_total_store_size);
862 862 sli->sli_total_meta_size = BSWAP_64(sli->sli_total_meta_size);
863 863 sli->sli_lu_data_offset = BSWAP_64(sli->sli_lu_data_offset);
864 864 sli->sli_lu_data_size = BSWAP_64(sli->sli_lu_data_size);
865 865 sli->sli_flags = BSWAP_32(sli->sli_flags);
866 866 sli->sli_blocksize = BSWAP_16(sli->sli_blocksize);
867 867 }
868 868
869 869 void
870 870 sbd_swap_lu_info_1_1(sbd_lu_info_1_1_t *sli)
871 871 {
872 872 sbd_swap_section_hdr(&sli->sli_sms_header);
873 873 if (sli->sli_data_order == SMS_DATA_ORDER)
874 874 return;
875 875 sli->sli_sms_header.sms_chksum += SMS_DATA_ORDER - sli->sli_data_order;
876 876 sli->sli_data_order = SMS_DATA_ORDER;
877 877 sli->sli_flags = BSWAP_32(sli->sli_flags);
878 878 sli->sli_lu_size = BSWAP_64(sli->sli_lu_size);
879 879 sli->sli_meta_fname_offset = BSWAP_64(sli->sli_meta_fname_offset);
880 880 sli->sli_data_fname_offset = BSWAP_64(sli->sli_data_fname_offset);
881 881 sli->sli_serial_offset = BSWAP_64(sli->sli_serial_offset);
882 882 sli->sli_alias_offset = BSWAP_64(sli->sli_alias_offset);
883 883 sli->sli_mgmt_url_offset = BSWAP_64(sli->sli_mgmt_url_offset);
884 884 }
885 885
886 886 sbd_status_t
887 887 sbd_load_section_hdr(sbd_lu_t *sl, sm_section_hdr_t *sms)
888 888 {
889 889 sm_section_hdr_t h;
890 890 uint64_t st;
891 891 sbd_status_t ret;
892 892
893 893 for (st = sl->sl_meta_offset + sizeof (sbd_meta_start_t);
894 894 st < sl->sl_meta_size_used; st += h.sms_size) {
895 895 if ((ret = sbd_read_meta(sl, st, sizeof (sm_section_hdr_t),
896 896 (uint8_t *)&h)) != SBD_SUCCESS) {
897 897 return (ret);
898 898 }
899 899 if (h.sms_data_order != SMS_DATA_ORDER) {
900 900 sbd_swap_section_hdr(&h);
901 901 }
902 902 if ((h.sms_data_order != SMS_DATA_ORDER) ||
903 903 (h.sms_offset != st) || (h.sms_size < sizeof (h)) ||
904 904 ((st + h.sms_size) > sl->sl_meta_size_used)) {
905 905 return (SBD_META_CORRUPTED);
906 906 }
907 907 if (h.sms_id == sms->sms_id) {
908 908 bcopy(&h, sms, sizeof (h));
909 909 return (SBD_SUCCESS);
910 910 }
911 911 }
912 912
913 913 return (SBD_NOT_FOUND);
914 914 }
915 915
916 916 sbd_status_t
917 917 sbd_load_meta_start(sbd_lu_t *sl)
918 918 {
919 919 sbd_meta_start_t *sm;
920 920 sbd_status_t ret;
921 921
922 922 /* Fake meta params initially */
923 923 sl->sl_total_meta_size = (uint64_t)-1;
924 924 sl->sl_meta_size_used = sl->sl_meta_offset + sizeof (sbd_meta_start_t);
925 925
926 926 sm = kmem_zalloc(sizeof (*sm), KM_SLEEP);
927 927 ret = sbd_read_meta(sl, sl->sl_meta_offset, sizeof (*sm),
928 928 (uint8_t *)sm);
929 929 if (ret != SBD_SUCCESS) {
930 930 goto load_meta_start_failed;
931 931 }
932 932
933 933 if (sm->sm_magic != SBD_MAGIC) {
934 934 sbd_swap_meta_start(sm);
935 935 }
936 936
937 937 if ((sm->sm_magic != SBD_MAGIC) || (sbd_calc_sum((uint8_t *)sm,
938 938 sizeof (*sm) - 1) != sm->sm_chksum)) {
939 939 ret = SBD_META_CORRUPTED;
940 940 goto load_meta_start_failed;
941 941 }
942 942
943 943 if (sm->sm_ver_major != SBD_VER_MAJOR) {
944 944 ret = SBD_NOT_SUPPORTED;
945 945 goto load_meta_start_failed;
946 946 }
947 947
948 948 sl->sl_total_meta_size = sm->sm_meta_size;
949 949 sl->sl_meta_size_used = sm->sm_meta_size_used;
950 950 ret = SBD_SUCCESS;
951 951
952 952 load_meta_start_failed:
953 953 kmem_free(sm, sizeof (*sm));
954 954 return (ret);
955 955 }
956 956
957 957 sbd_status_t
958 958 sbd_write_meta_start(sbd_lu_t *sl, uint64_t meta_size, uint64_t meta_size_used)
959 959 {
960 960 sbd_meta_start_t *sm;
961 961 sbd_status_t ret;
962 962
963 963 sm = (sbd_meta_start_t *)kmem_zalloc(sizeof (sbd_meta_start_t),
964 964 KM_SLEEP);
965 965
966 966 sm->sm_magic = SBD_MAGIC;
967 967 sm->sm_meta_size = meta_size;
968 968 sm->sm_meta_size_used = meta_size_used;
969 969 sm->sm_ver_major = SBD_VER_MAJOR;
970 970 sm->sm_ver_minor = SBD_VER_MINOR;
971 971 sm->sm_ver_subminor = SBD_VER_SUBMINOR;
972 972 sm->sm_chksum = sbd_calc_sum((uint8_t *)sm, sizeof (*sm) - 1);
973 973
974 974 ret = sbd_write_meta(sl, sl->sl_meta_offset, sizeof (*sm),
975 975 (uint8_t *)sm);
976 976 kmem_free(sm, sizeof (*sm));
977 977
978 978 return (ret);
979 979 }
980 980
981 981 sbd_status_t
982 982 sbd_read_meta_section(sbd_lu_t *sl, sm_section_hdr_t **ppsms, uint16_t sms_id)
983 983 {
984 984 sbd_status_t ret;
985 985 sm_section_hdr_t sms;
986 986 int alloced = 0;
987 987
988 988 mutex_enter(&sl->sl_metadata_lock);
989 989 if (((*ppsms) == NULL) || ((*ppsms)->sms_offset == 0)) {
990 990 bzero(&sms, sizeof (sm_section_hdr_t));
991 991 sms.sms_id = sms_id;
992 992 if ((ret = sbd_load_section_hdr(sl, &sms)) != SBD_SUCCESS) {
993 993 mutex_exit(&sl->sl_metadata_lock);
994 994 return (ret);
995 995 } else {
996 996 if ((*ppsms) == NULL) {
997 997 *ppsms = (sm_section_hdr_t *)kmem_zalloc(
998 998 sms.sms_size, KM_SLEEP);
999 999 alloced = 1;
1000 1000 }
1001 1001 bcopy(&sms, *ppsms, sizeof (sm_section_hdr_t));
1002 1002 }
1003 1003 }
1004 1004
1005 1005 ret = sbd_read_meta(sl, (*ppsms)->sms_offset, (*ppsms)->sms_size,
1006 1006 (uint8_t *)(*ppsms));
1007 1007 if (ret == SBD_SUCCESS) {
1008 1008 uint8_t s;
1009 1009 if ((*ppsms)->sms_data_order != SMS_DATA_ORDER)
1010 1010 sbd_swap_section_hdr(*ppsms);
1011 1011 if ((*ppsms)->sms_id != SMS_ID_UNUSED) {
1012 1012 s = sbd_calc_section_sum(*ppsms, (*ppsms)->sms_size);
1013 1013 if (s != (*ppsms)->sms_chksum)
1014 1014 ret = SBD_META_CORRUPTED;
1015 1015 }
1016 1016 }
1017 1017 mutex_exit(&sl->sl_metadata_lock);
1018 1018
1019 1019 if ((ret != SBD_SUCCESS) && alloced)
1020 1020 kmem_free(*ppsms, sms.sms_size);
1021 1021 return (ret);
1022 1022 }
1023 1023
1024 1024 sbd_status_t
1025 1025 sbd_load_section_hdr_unbuffered(sbd_lu_t *sl, sm_section_hdr_t *sms)
1026 1026 {
1027 1027 sbd_status_t ret;
1028 1028
1029 1029 /*
1030 1030 * Bypass buffering and re-read the meta data from permanent storage.
1031 1031 */
1032 1032 if (sl->sl_flags & SL_ZFS_META) {
1033 1033 if ((ret = sbd_open_zfs_meta(sl)) != SBD_SUCCESS) {
1034 1034 return (ret);
1035 1035 }
1036 1036 }
1037 1037 /* Re-get the meta sizes into sl */
1038 1038 if ((ret = sbd_load_meta_start(sl)) != SBD_SUCCESS) {
1039 1039 return (ret);
1040 1040 }
1041 1041 return (sbd_load_section_hdr(sl, sms));
1042 1042 }
1043 1043
1044 1044 sbd_status_t
1045 1045 sbd_write_meta_section(sbd_lu_t *sl, sm_section_hdr_t *sms)
1046 1046 {
1047 1047 sm_section_hdr_t t;
1048 1048 uint64_t off, s;
1049 1049 uint64_t unused_start;
1050 1050 sbd_status_t ret;
1051 1051 sbd_status_t write_meta_ret = SBD_SUCCESS;
1052 1052 uint8_t *cb;
1053 1053 int meta_size_changed = 0;
1054 1054 sm_section_hdr_t sms_before_unused = {0};
1055 1055
1056 1056 mutex_enter(&sl->sl_metadata_lock);
1057 1057 write_meta_section_again:
1058 1058 if (sms->sms_offset) {
1059 1059 /*
1060 1060 * If the section already exists and the size is the
1061 1061 * same as this new data then overwrite in place. If
1062 1062 * the sizes are different then mark the existing as
1063 1063 * unused and look for free space.
1064 1064 */
1065 1065 ret = sbd_read_meta(sl, sms->sms_offset, sizeof (t),
1066 1066 (uint8_t *)&t);
1067 1067 if (ret != SBD_SUCCESS) {
1068 1068 mutex_exit(&sl->sl_metadata_lock);
1069 1069 return (ret);
1070 1070 }
1071 1071 if (t.sms_data_order != SMS_DATA_ORDER) {
1072 1072 sbd_swap_section_hdr(&t);
1073 1073 }
1074 1074 if (t.sms_id != sms->sms_id) {
1075 1075 mutex_exit(&sl->sl_metadata_lock);
1076 1076 return (SBD_INVALID_ARG);
1077 1077 }
1078 1078 if (t.sms_size == sms->sms_size) {
1079 1079 ret = sbd_write_meta(sl, sms->sms_offset,
1080 1080 sms->sms_size, (uint8_t *)sms);
1081 1081 mutex_exit(&sl->sl_metadata_lock);
1082 1082 return (ret);
1083 1083 }
1084 1084 sms_before_unused = t;
1085 1085
1086 1086 t.sms_id = SMS_ID_UNUSED;
1087 1087 /*
1088 1088 * For unused sections we only use chksum of the header. for
1089 1089 * all other sections, the chksum is for the entire section.
1090 1090 */
1091 1091 t.sms_chksum = sbd_calc_section_sum(&t, sizeof (t));
1092 1092 ret = sbd_write_meta(sl, t.sms_offset, sizeof (t),
1093 1093 (uint8_t *)&t);
1094 1094 if (ret != SBD_SUCCESS) {
1095 1095 mutex_exit(&sl->sl_metadata_lock);
1096 1096 return (ret);
1097 1097 }
1098 1098 sms->sms_offset = 0;
1099 1099 } else {
1100 1100 /* Section location is unknown, search for it. */
1101 1101 t.sms_id = sms->sms_id;
1102 1102 t.sms_data_order = SMS_DATA_ORDER;
1103 1103 ret = sbd_load_section_hdr(sl, &t);
1104 1104 if (ret == SBD_SUCCESS) {
1105 1105 sms->sms_offset = t.sms_offset;
1106 1106 sms->sms_chksum =
1107 1107 sbd_calc_section_sum(sms, sms->sms_size);
1108 1108 goto write_meta_section_again;
1109 1109 } else if (ret != SBD_NOT_FOUND) {
1110 1110 mutex_exit(&sl->sl_metadata_lock);
1111 1111 return (ret);
1112 1112 }
1113 1113 }
1114 1114
1115 1115 /*
1116 1116 * At this point we know that section does not already exist.
1117 1117 * Find space large enough to hold the section or grow meta if
1118 1118 * possible.
1119 1119 */
1120 1120 unused_start = 0;
1121 1121 s = 0; /* size of space found */
1122 1122
1123 1123 /*
1124 1124 * Search all sections for unused space of sufficient size.
1125 1125 * The first one found is taken. Contiguous unused sections
1126 1126 * will be combined.
1127 1127 */
1128 1128 for (off = sl->sl_meta_offset + sizeof (sbd_meta_start_t);
1129 1129 off < sl->sl_meta_size_used; off += t.sms_size) {
1130 1130 ret = sbd_read_meta(sl, off, sizeof (t), (uint8_t *)&t);
1131 1131 if (ret != SBD_SUCCESS) {
1132 1132 mutex_exit(&sl->sl_metadata_lock);
1133 1133 return (ret);
1134 1134 }
1135 1135 if (t.sms_data_order != SMS_DATA_ORDER)
1136 1136 sbd_swap_section_hdr(&t);
1137 1137 if (t.sms_size == 0) {
1138 1138 mutex_exit(&sl->sl_metadata_lock);
1139 1139 return (SBD_META_CORRUPTED);
1140 1140 }
1141 1141 if (t.sms_id == SMS_ID_UNUSED) {
1142 1142 if (unused_start == 0)
1143 1143 unused_start = off;
1144 1144 /*
1145 1145 * Calculate size of the unused space, break out
1146 1146 * if it satisfies the requirement.
1147 1147 */
1148 1148 s = t.sms_size - unused_start + off;
1149 1149 if ((s == sms->sms_size) || (s >= (sms->sms_size +
1150 1150 sizeof (t)))) {
1151 1151 break;
1152 1152 } else {
1153 1153 s = 0;
1154 1154 }
1155 1155 } else {
1156 1156 unused_start = 0;
1157 1157 }
1158 1158 }
1159 1159
1160 1160 off = (unused_start == 0) ? sl->sl_meta_size_used : unused_start;
1161 1161 /*
1162 1162 * If none found, how much room is at the end?
1163 1163 * See if the data can be expanded.
1164 1164 */
1165 1165 if (s == 0) {
1166 1166 s = sl->sl_total_meta_size - off;
1167 1167 if (s >= sms->sms_size || !(sl->sl_flags & SL_SHARED_META)) {
1168 1168 s = sms->sms_size;
1169 1169 meta_size_changed = 1;
1170 1170 } else {
1171 1171 s = 0;
1172 1172 }
1173 1173 }
1174 1174
1175 1175 if (s == 0) {
1176 1176 mutex_exit(&sl->sl_metadata_lock);
1177 1177 return (SBD_ALLOC_FAILURE);
1178 1178 }
1179 1179
1180 1180 sms->sms_offset = off;
1181 1181 sms->sms_chksum = sbd_calc_section_sum(sms, sms->sms_size);
1182 1182 /*
1183 1183 * Since we may have to write more than one section (current +
1184 1184 * any unused), use a combined buffer.
1185 1185 */
1186 1186 cb = kmem_zalloc(s, KM_SLEEP);
1187 1187 bcopy(sms, cb, sms->sms_size);
1188 1188 if (s > sms->sms_size) {
1189 1189 t.sms_offset = off + sms->sms_size;
1190 1190 t.sms_size = s - sms->sms_size;
1191 1191 t.sms_id = SMS_ID_UNUSED;
1192 1192 t.sms_data_order = SMS_DATA_ORDER;
1193 1193 t.sms_chksum = sbd_calc_section_sum(&t, sizeof (t));
1194 1194 bcopy(&t, cb + sms->sms_size, sizeof (t));
1195 1195 }
1196 1196 /*
1197 1197 * Two write events & statuses take place. Failure writing the
1198 1198 * meta section takes precedence, can possibly be rolled back,
1199 1199 * & gets reported. Else return status from writing the meta start.
1200 1200 */
1201 1201 ret = SBD_SUCCESS; /* Set a default, it's not always loaded below. */
1202 1202 if (meta_size_changed) {
1203 1203 uint64_t old_meta_size;
1204 1204 uint64_t old_sz_used = sl->sl_meta_size_used; /* save a copy */
1205 1205 old_meta_size = sl->sl_total_meta_size; /* save a copy */
1206 1206
1207 1207 write_meta_ret = sbd_write_meta(sl, off, s, cb);
1208 1208 if (write_meta_ret == SBD_SUCCESS) {
1209 1209 sl->sl_meta_size_used = off + s;
1210 1210 if (sl->sl_total_meta_size < sl->sl_meta_size_used) {
1211 1211 uint64_t meta_align =
1212 1212 (((uint64_t)1) <<
1213 1213 sl->sl_meta_blocksize_shift) - 1;
1214 1214 sl->sl_total_meta_size =
1215 1215 (sl->sl_meta_size_used + meta_align) &
1216 1216 (~meta_align);
1217 1217 }
1218 1218 ret = sbd_write_meta_start(sl, sl->sl_total_meta_size,
1219 1219 sl->sl_meta_size_used);
1220 1220 if (ret != SBD_SUCCESS) {
1221 1221 sl->sl_meta_size_used = old_sz_used;
1222 1222 sl->sl_total_meta_size = old_meta_size;
1223 1223 }
1224 1224 } else {
1225 1225 sl->sl_meta_size_used = old_sz_used;
1226 1226 sl->sl_total_meta_size = old_meta_size;
1227 1227 }
1228 1228 } else {
1229 1229 write_meta_ret = sbd_write_meta(sl, off, s, cb);
1230 1230 }
1231 1231 if ((write_meta_ret != SBD_SUCCESS) &&
1232 1232 (sms_before_unused.sms_offset != 0)) {
1233 1233 sm_section_hdr_t new_sms;
1234 1234 sm_section_hdr_t *unused_sms;
1235 1235 /*
1236 1236 * On failure writing the meta section attempt to undo
1237 1237 * the change to unused.
1238 1238 * Re-read the meta data from permanent storage.
1239 1239 * The section id can't exist for undo to be possible.
1240 1240 * Read what should be the entire old section data and
1241 1241 * insure the old data's still present by validating
1242 1242 * against it's old checksum.
1243 1243 */
1244 1244 new_sms.sms_id = sms->sms_id;
1245 1245 new_sms.sms_data_order = SMS_DATA_ORDER;
1246 1246 if (sbd_load_section_hdr_unbuffered(sl, &new_sms) !=
1247 1247 SBD_NOT_FOUND) {
1248 1248 goto done;
1249 1249 }
1250 1250 unused_sms = kmem_zalloc(sms_before_unused.sms_size, KM_SLEEP);
1251 1251 if (sbd_read_meta(sl, sms_before_unused.sms_offset,
1252 1252 sms_before_unused.sms_size,
1253 1253 (uint8_t *)unused_sms) != SBD_SUCCESS) {
1254 1254 goto done;
1255 1255 }
1256 1256 if (unused_sms->sms_data_order != SMS_DATA_ORDER) {
1257 1257 sbd_swap_section_hdr(unused_sms);
1258 1258 }
1259 1259 if (unused_sms->sms_id != SMS_ID_UNUSED) {
1260 1260 goto done;
1261 1261 }
1262 1262 if (unused_sms->sms_offset != sms_before_unused.sms_offset) {
1263 1263 goto done;
1264 1264 }
1265 1265 if (unused_sms->sms_size != sms_before_unused.sms_size) {
1266 1266 goto done;
1267 1267 }
1268 1268 unused_sms->sms_id = sms_before_unused.sms_id;
1269 1269 if (sbd_calc_section_sum(unused_sms,
1270 1270 sizeof (sm_section_hdr_t)) !=
1271 1271 sbd_calc_section_sum(&sms_before_unused,
1272 1272 sizeof (sm_section_hdr_t))) {
1273 1273 goto done;
1274 1274 }
1275 1275 unused_sms->sms_chksum =
1276 1276 sbd_calc_section_sum(unused_sms, unused_sms->sms_size);
1277 1277 if (unused_sms->sms_chksum != sms_before_unused.sms_chksum) {
1278 1278 goto done;
1279 1279 }
1280 1280 (void) sbd_write_meta(sl, unused_sms->sms_offset,
1281 1281 sizeof (sm_section_hdr_t), (uint8_t *)unused_sms);
1282 1282 }
1283 1283 done:
1284 1284 mutex_exit(&sl->sl_metadata_lock);
1285 1285 kmem_free(cb, s);
1286 1286 if (write_meta_ret != SBD_SUCCESS) {
1287 1287 return (write_meta_ret);
1288 1288 }
1289 1289 return (ret);
1290 1290 }
1291 1291
1292 1292 sbd_status_t
1293 1293 sbd_write_lu_info(sbd_lu_t *sl)
1294 1294 {
1295 1295 sbd_lu_info_1_1_t *sli;
1296 1296 int s;
1297 1297 uint8_t *p;
1298 1298 char *zvol_name = NULL;
1299 1299 sbd_status_t ret;
1300 1300
1301 1301 mutex_enter(&sl->sl_lock);
1302 1302
1303 1303 s = sl->sl_serial_no_size;
1304 1304 if ((sl->sl_flags & (SL_SHARED_META | SL_ZFS_META)) == 0) {
1305 1305 if (sl->sl_data_filename) {
1306 1306 s += strlen(sl->sl_data_filename) + 1;
1307 1307 }
1308 1308 }
1309 1309 if (sl->sl_flags & SL_ZFS_META) {
1310 1310 zvol_name = sbd_get_zvol_name(sl);
1311 1311 s += strlen(zvol_name) + 1;
1312 1312 }
1313 1313 if (sl->sl_alias) {
1314 1314 s += strlen(sl->sl_alias) + 1;
1315 1315 }
1316 1316 if (sl->sl_mgmt_url) {
1317 1317 s += strlen(sl->sl_mgmt_url) + 1;
1318 1318 }
1319 1319 sli = (sbd_lu_info_1_1_t *)kmem_zalloc(sizeof (*sli) + s, KM_SLEEP);
1320 1320 p = sli->sli_buf;
1321 1321 if ((sl->sl_flags & (SL_SHARED_META | SL_ZFS_META)) == 0) {
1322 1322 sli->sli_flags |= SLI_SEPARATE_META;
1323 1323 (void) strcpy((char *)p, sl->sl_data_filename);
1324 1324 sli->sli_data_fname_offset =
1325 1325 (uintptr_t)p - (uintptr_t)sli->sli_buf;
1326 1326 sli->sli_flags |= SLI_DATA_FNAME_VALID;
1327 1327 p += strlen(sl->sl_data_filename) + 1;
1328 1328 }
1329 1329 if (sl->sl_flags & SL_ZFS_META) {
1330 1330 (void) strcpy((char *)p, zvol_name);
1331 1331 sli->sli_meta_fname_offset =
1332 1332 (uintptr_t)p - (uintptr_t)sli->sli_buf;
1333 1333 sli->sli_flags |= SLI_META_FNAME_VALID | SLI_ZFS_META;
1334 1334 p += strlen(zvol_name) + 1;
1335 1335 kmem_free(zvol_name, strlen(zvol_name) + 1);
1336 1336 zvol_name = NULL;
1337 1337 }
1338 1338 if (sl->sl_alias) {
1339 1339 (void) strcpy((char *)p, sl->sl_alias);
1340 1340 sli->sli_alias_offset =
1341 1341 (uintptr_t)p - (uintptr_t)sli->sli_buf;
1342 1342 sli->sli_flags |= SLI_ALIAS_VALID;
1343 1343 p += strlen(sl->sl_alias) + 1;
1344 1344 }
1345 1345 if (sl->sl_mgmt_url) {
1346 1346 (void) strcpy((char *)p, sl->sl_mgmt_url);
1347 1347 sli->sli_mgmt_url_offset =
1348 1348 (uintptr_t)p - (uintptr_t)sli->sli_buf;
1349 1349 sli->sli_flags |= SLI_MGMT_URL_VALID;
1350 1350 p += strlen(sl->sl_mgmt_url) + 1;
1351 1351 }
1352 1352 if (sl->sl_flags & SL_WRITE_PROTECTED) {
1353 1353 sli->sli_flags |= SLI_WRITE_PROTECTED;
1354 1354 }
1355 1355 if (sl->sl_flags & SL_SAVED_WRITE_CACHE_DISABLE) {
1356 1356 sli->sli_flags |= SLI_WRITEBACK_CACHE_DISABLE;
1357 1357 }
1358 1358 if (sl->sl_flags & SL_VID_VALID) {
1359 1359 bcopy(sl->sl_vendor_id, sli->sli_vid, 8);
1360 1360 sli->sli_flags |= SLI_VID_VALID;
1361 1361 }
1362 1362 if (sl->sl_flags & SL_PID_VALID) {
1363 1363 bcopy(sl->sl_product_id, sli->sli_pid, 16);
1364 1364 sli->sli_flags |= SLI_PID_VALID;
1365 1365 }
1366 1366 if (sl->sl_flags & SL_REV_VALID) {
1367 1367 bcopy(sl->sl_revision, sli->sli_rev, 4);
1368 1368 sli->sli_flags |= SLI_REV_VALID;
1369 1369 }
1370 1370 if (sl->sl_serial_no_size) {
1371 1371 bcopy(sl->sl_serial_no, p, sl->sl_serial_no_size);
1372 1372 sli->sli_serial_size = sl->sl_serial_no_size;
1373 1373 sli->sli_serial_offset =
1374 1374 (uintptr_t)p - (uintptr_t)sli->sli_buf;
1375 1375 sli->sli_flags |= SLI_SERIAL_VALID;
1376 1376 p += sli->sli_serial_size;
1377 1377 }
1378 1378 sli->sli_lu_size = sl->sl_lu_size;
1379 1379 sli->sli_data_blocksize_shift = sl->sl_data_blocksize_shift;
1380 1380 sli->sli_data_order = SMS_DATA_ORDER;
1381 1381 bcopy(sl->sl_device_id, sli->sli_device_id, 20);
1382 1382
1383 1383 sli->sli_sms_header.sms_size = sizeof (*sli) + s;
1384 1384 sli->sli_sms_header.sms_id = SMS_ID_LU_INFO_1_1;
1385 1385 sli->sli_sms_header.sms_data_order = SMS_DATA_ORDER;
1386 1386
1387 1387 mutex_exit(&sl->sl_lock);
1388 1388 ret = sbd_write_meta_section(sl, (sm_section_hdr_t *)sli);
1389 1389 kmem_free(sli, sizeof (*sli) + s);
1390 1390 return (ret);
1391 1391 }
1392 1392
1393 1393 /*
1394 1394 * Will scribble SL_UNMAP_ENABLED into sl_flags if we succeed.
1395 1395 */
1396 1396 static void
1397 1397 do_unmap_setup(sbd_lu_t *sl)
1398 1398 {
1399 1399 ASSERT((sl->sl_flags & SL_UNMAP_ENABLED) == 0);
1400 1400
1401 1401 if ((sl->sl_flags & SL_ZFS_META) == 0)
1402 1402 return; /* No UNMAP for you. */
1403 1403
1404 1404 sl->sl_flags |= SL_UNMAP_ENABLED;
1405 1405 }
1406 1406
1407 1407 int
1408 1408 sbd_populate_and_register_lu(sbd_lu_t *sl, uint32_t *err_ret)
1409 1409 {
1410 1410 stmf_lu_t *lu = sl->sl_lu;
1411 1411 stmf_status_t ret;
1412 1412
1413 1413 do_unmap_setup(sl);
1414 1414
1415 1415 lu->lu_id = (scsi_devid_desc_t *)sl->sl_device_id;
1416 1416 if (sl->sl_alias) {
1417 1417 lu->lu_alias = sl->sl_alias;
1418 1418 } else {
1419 1419 lu->lu_alias = sl->sl_name;
1420 1420 }
1421 1421 if (sl->sl_access_state == SBD_LU_STANDBY) {
1422 1422 /* call set access state */
1423 1423 ret = stmf_set_lu_access(lu, STMF_LU_STANDBY);
1424 1424 if (ret != STMF_SUCCESS) {
1425 1425 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
1426 1426 return (EIO);
1427 1427 }
1428 1428 }
1429 1429 /* set proxy_reg_cb_arg to meta filename */
1430 1430 if (sl->sl_meta_filename) {
1431 1431 lu->lu_proxy_reg_arg = sl->sl_meta_filename;
1432 1432 lu->lu_proxy_reg_arg_len = strlen(sl->sl_meta_filename) + 1;
1433 1433 } else {
1434 1434 lu->lu_proxy_reg_arg = sl->sl_data_filename;
1435 1435 lu->lu_proxy_reg_arg_len = strlen(sl->sl_data_filename) + 1;
1436 1436 }
1437 1437 lu->lu_lp = sbd_lp;
1438 1438 lu->lu_task_alloc = sbd_task_alloc;
1439 1439 lu->lu_new_task = sbd_new_task;
1440 1440 lu->lu_dbuf_xfer_done = sbd_dbuf_xfer_done;
1441 1441 lu->lu_send_status_done = sbd_send_status_done;
1442 1442 lu->lu_task_free = sbd_task_free;
1443 1443 lu->lu_abort = sbd_abort;
1444 1444 lu->lu_dbuf_free = sbd_dbuf_free;
1445 1445 lu->lu_ctl = sbd_ctl;
1446 1446 lu->lu_info = sbd_info;
1447 1447 sl->sl_state = STMF_STATE_OFFLINE;
1448 1448
1449 1449 if ((ret = stmf_register_lu(lu)) != STMF_SUCCESS) {
1450 1450 stmf_trace(0, "Failed to register with framework, ret=%llx",
1451 1451 ret);
1452 1452 if (ret == STMF_ALREADY) {
1453 1453 *err_ret = SBD_RET_GUID_ALREADY_REGISTERED;
1454 1454 }
1455 1455 return (EIO);
1456 1456 }
1457 1457
1458 1458 *err_ret = 0;
1459 1459 return (0);
1460 1460 }
1461 1461
1462 1462 int
1463 1463 sbd_open_data_file(sbd_lu_t *sl, uint32_t *err_ret, int lu_size_valid,
1464 1464 int vp_valid, int keep_open)
1465 1465 {
1466 1466 int ret;
1467 1467 int flag;
1468 1468 ulong_t nbits;
1469 1469 uint64_t supported_size;
1470 1470 vattr_t vattr;
1471 1471 enum vtype vt;
1472 1472 struct dk_cinfo dki;
1473 1473 int unused;
1474 1474
1475 1475 mutex_enter(&sl->sl_lock);
1476 1476 if (vp_valid) {
1477 1477 goto odf_over_open;
1478 1478 }
1479 1479 if (sl->sl_data_filename[0] != '/') {
1480 1480 *err_ret = SBD_RET_DATA_PATH_NOT_ABSOLUTE;
1481 1481 mutex_exit(&sl->sl_lock);
1482 1482 return (EINVAL);
1483 1483 }
1484 1484 if ((ret = lookupname(sl->sl_data_filename, UIO_SYSSPACE, FOLLOW,
1485 1485 NULLVPP, &sl->sl_data_vp)) != 0) {
1486 1486 *err_ret = SBD_RET_DATA_FILE_LOOKUP_FAILED;
1487 1487 mutex_exit(&sl->sl_lock);
1488 1488 return (ret);
1489 1489 }
1490 1490 sl->sl_data_vtype = vt = sl->sl_data_vp->v_type;
1491 1491 VN_RELE(sl->sl_data_vp);
1492 1492 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) {
1493 1493 *err_ret = SBD_RET_WRONG_DATA_FILE_TYPE;
1494 1494 mutex_exit(&sl->sl_lock);
1495 1495 return (EINVAL);
1496 1496 }
1497 1497 if (sl->sl_flags & SL_WRITE_PROTECTED) {
1498 1498 flag = FREAD | FOFFMAX;
1499 1499 } else {
1500 1500 flag = FREAD | FWRITE | FOFFMAX | FEXCL;
1501 1501 }
1502 1502 if ((ret = vn_open(sl->sl_data_filename, UIO_SYSSPACE, flag, 0,
1503 1503 &sl->sl_data_vp, 0, 0)) != 0) {
1504 1504 *err_ret = SBD_RET_DATA_FILE_OPEN_FAILED;
1505 1505 mutex_exit(&sl->sl_lock);
1506 1506 return (ret);
1507 1507 }
1508 1508 odf_over_open:
1509 1509 vattr.va_mask = AT_SIZE;
1510 1510 if ((ret = VOP_GETATTR(sl->sl_data_vp, &vattr, 0, CRED(), NULL)) != 0) {
1511 1511 *err_ret = SBD_RET_DATA_FILE_GETATTR_FAILED;
1512 1512 goto odf_close_data_and_exit;
1513 1513 }
1514 1514 if ((vt != VREG) && (vattr.va_size == 0)) {
1515 1515 /*
1516 1516 * Its a zero byte block or char device. This cannot be
1517 1517 * a raw disk.
1518 1518 */
1519 1519 *err_ret = SBD_RET_WRONG_DATA_FILE_TYPE;
1520 1520 ret = EINVAL;
1521 1521 goto odf_close_data_and_exit;
1522 1522 }
1523 1523 /* sl_data_readable size includes any metadata. */
1524 1524 sl->sl_data_readable_size = vattr.va_size;
1525 1525
1526 1526 if (VOP_PATHCONF(sl->sl_data_vp, _PC_FILESIZEBITS, &nbits,
1527 1527 CRED(), NULL) != 0) {
1528 1528 nbits = 0;
1529 1529 }
1530 1530 /* nbits cannot be greater than 64 */
1531 1531 sl->sl_data_fs_nbits = (uint8_t)nbits;
1532 1532 if (lu_size_valid) {
1533 1533 sl->sl_total_data_size = sl->sl_lu_size;
1534 1534 if (sl->sl_flags & SL_SHARED_META) {
1535 1535 sl->sl_total_data_size += SHARED_META_DATA_SIZE;
1536 1536 }
1537 1537 if ((nbits > 0) && (nbits < 64)) {
1538 1538 /*
1539 1539 * The expression below is correct only if nbits is
1540 1540 * positive and less than 64.
1541 1541 */
1542 1542 supported_size = (((uint64_t)1) << nbits) - 1;
1543 1543 if (sl->sl_total_data_size > supported_size) {
1544 1544 *err_ret = SBD_RET_SIZE_NOT_SUPPORTED_BY_FS;
1545 1545 ret = EINVAL;
1546 1546 goto odf_close_data_and_exit;
1547 1547 }
1548 1548 }
1549 1549 } else {
1550 1550 sl->sl_total_data_size = vattr.va_size;
1551 1551 if (sl->sl_flags & SL_SHARED_META) {
1552 1552 if (vattr.va_size > SHARED_META_DATA_SIZE) {
1553 1553 sl->sl_lu_size = vattr.va_size -
1554 1554 SHARED_META_DATA_SIZE;
1555 1555 } else {
1556 1556 *err_ret = SBD_RET_FILE_SIZE_ERROR;
1557 1557 ret = EINVAL;
1558 1558 goto odf_close_data_and_exit;
1559 1559 }
1560 1560 } else {
1561 1561 sl->sl_lu_size = vattr.va_size;
1562 1562 }
1563 1563 }
1564 1564 if (sl->sl_lu_size < SBD_MIN_LU_SIZE) {
1565 1565 *err_ret = SBD_RET_FILE_SIZE_ERROR;
1566 1566 ret = EINVAL;
1567 1567 goto odf_close_data_and_exit;
1568 1568 }
1569 1569 if (sl->sl_lu_size &
1570 1570 ((((uint64_t)1) << sl->sl_data_blocksize_shift) - 1)) {
1571 1571 *err_ret = SBD_RET_FILE_ALIGN_ERROR;
1572 1572 ret = EINVAL;
1573 1573 goto odf_close_data_and_exit;
1574 1574 }
1575 1575 /*
1576 1576 * Get the minor device for direct zvol access
1577 1577 */
1578 1578 if (sl->sl_flags & SL_ZFS_META) {
1579 1579 if ((ret = VOP_IOCTL(sl->sl_data_vp, DKIOCINFO, (intptr_t)&dki,
1580 1580 FKIOCTL, kcred, &unused, NULL)) != 0) {
1581 1581 cmn_err(CE_WARN, "ioctl(DKIOCINFO) failed %d", ret);
1582 1582 /* zvol reserves 0, so this would fail later */
1583 1583 sl->sl_zvol_minor = 0;
1584 1584 } else {
1585 1585 sl->sl_zvol_minor = dki.dki_unit;
1586 1586 if (sbd_zvol_get_volume_params(sl) == 0)
1587 1587 sl->sl_flags |= SL_CALL_ZVOL;
1588 1588 }
1589 1589 }
1590 1590 sl->sl_flags |= SL_MEDIA_LOADED;
1591 1591 mutex_exit(&sl->sl_lock);
1592 1592 return (0);
1593 1593
1594 1594 odf_close_data_and_exit:
1595 1595 if (!keep_open) {
1596 1596 (void) VOP_CLOSE(sl->sl_data_vp, flag, 1, 0, CRED(), NULL);
1597 1597 VN_RELE(sl->sl_data_vp);
1598 1598 }
1599 1599 mutex_exit(&sl->sl_lock);
1600 1600 return (ret);
1601 1601 }
1602 1602
1603 1603 void
1604 1604 sbd_close_lu(sbd_lu_t *sl)
1605 1605 {
1606 1606 int flag;
1607 1607
1608 1608 if (((sl->sl_flags & SL_SHARED_META) == 0) &&
1609 1609 (sl->sl_flags & SL_META_OPENED)) {
1610 1610 if (sl->sl_flags & SL_ZFS_META) {
1611 1611 rw_destroy(&sl->sl_zfs_meta_lock);
1612 1612 if (sl->sl_zfs_meta) {
1613 1613 kmem_free(sl->sl_zfs_meta, ZAP_MAXVALUELEN / 2);
1614 1614 sl->sl_zfs_meta = NULL;
1615 1615 }
1616 1616 } else {
1617 1617 flag = FREAD | FWRITE | FOFFMAX | FEXCL;
1618 1618 (void) VOP_CLOSE(sl->sl_meta_vp, flag, 1, 0,
1619 1619 CRED(), NULL);
1620 1620 VN_RELE(sl->sl_meta_vp);
1621 1621 }
1622 1622 sl->sl_flags &= ~SL_META_OPENED;
1623 1623 }
1624 1624 if (sl->sl_flags & SL_MEDIA_LOADED) {
1625 1625 if (sl->sl_flags & SL_WRITE_PROTECTED) {
1626 1626 flag = FREAD | FOFFMAX;
1627 1627 } else {
1628 1628 flag = FREAD | FWRITE | FOFFMAX | FEXCL;
1629 1629 }
1630 1630 (void) VOP_CLOSE(sl->sl_data_vp, flag, 1, 0, CRED(), NULL);
1631 1631 VN_RELE(sl->sl_data_vp);
1632 1632 sl->sl_flags &= ~SL_MEDIA_LOADED;
1633 1633 if (sl->sl_flags & SL_SHARED_META) {
1634 1634 sl->sl_flags &= ~SL_META_OPENED;
1635 1635 }
1636 1636 }
1637 1637 }
1638 1638
1639 1639 int
1640 1640 sbd_set_lu_standby(sbd_set_lu_standby_t *stlu, uint32_t *err_ret)
1641 1641 {
1642 1642 sbd_lu_t *sl;
1643 1643 sbd_status_t sret;
1644 1644 stmf_status_t stret;
1645 1645 uint8_t old_access_state;
1646 1646
1647 1647 sret = sbd_find_and_lock_lu(stlu->stlu_guid, NULL,
1648 1648 SL_OP_MODIFY_LU, &sl);
1649 1649 if (sret != SBD_SUCCESS) {
1650 1650 if (sret == SBD_BUSY) {
1651 1651 *err_ret = SBD_RET_LU_BUSY;
1652 1652 return (EBUSY);
1653 1653 } else if (sret == SBD_NOT_FOUND) {
1654 1654 *err_ret = SBD_RET_NOT_FOUND;
1655 1655 return (ENOENT);
1656 1656 }
1657 1657 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
1658 1658 return (EIO);
1659 1659 }
1660 1660
1661 1661 old_access_state = sl->sl_access_state;
1662 1662 sl->sl_access_state = SBD_LU_TRANSITION_TO_STANDBY;
1663 1663 stret = stmf_set_lu_access((stmf_lu_t *)sl->sl_lu, STMF_LU_STANDBY);
1664 1664 if (stret != STMF_SUCCESS) {
1665 1665 sl->sl_trans_op = SL_OP_NONE;
1666 1666 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
1667 1667 sl->sl_access_state = old_access_state;
1668 1668 return (EIO);
1669 1669 }
1670 1670
1671 1671 /*
1672 1672 * acquire the writer lock here to ensure we're not pulling
1673 1673 * the rug from the vn_rdwr to the backing store
1674 1674 */
1675 1675 rw_enter(&sl->sl_access_state_lock, RW_WRITER);
1676 1676 sbd_close_lu(sl);
1677 1677 rw_exit(&sl->sl_access_state_lock);
1678 1678
1679 1679 sl->sl_trans_op = SL_OP_NONE;
1680 1680 return (0);
1681 1681 }
1682 1682
1683 1683 int
1684 1684 sbd_close_delete_lu(sbd_lu_t *sl, int ret)
1685 1685 {
1686 1686
1687 1687 /*
1688 1688 * acquire the writer lock here to ensure we're not pulling
1689 1689 * the rug from the vn_rdwr to the backing store
1690 1690 */
1691 1691 rw_enter(&sl->sl_access_state_lock, RW_WRITER);
1692 1692 sbd_close_lu(sl);
1693 1693 rw_exit(&sl->sl_access_state_lock);
1694 1694
1695 1695 if (sl->sl_flags & SL_LINKED)
1696 1696 sbd_unlink_lu(sl);
1697 1697 mutex_destroy(&sl->sl_metadata_lock);
1698 1698 mutex_destroy(&sl->sl_lock);
1699 1699 rw_destroy(&sl->sl_pgr->pgr_lock);
1700 1700 rw_destroy(&sl->sl_access_state_lock);
1701 1701 if (sl->sl_serial_no_alloc_size) {
1702 1702 kmem_free(sl->sl_serial_no, sl->sl_serial_no_alloc_size);
1703 1703 }
1704 1704 if (sl->sl_data_fname_alloc_size) {
1705 1705 kmem_free(sl->sl_data_filename, sl->sl_data_fname_alloc_size);
1706 1706 }
1707 1707 if (sl->sl_alias_alloc_size) {
1708 1708 kmem_free(sl->sl_alias, sl->sl_alias_alloc_size);
1709 1709 }
1710 1710 if (sl->sl_mgmt_url_alloc_size) {
1711 1711 kmem_free(sl->sl_mgmt_url, sl->sl_mgmt_url_alloc_size);
1712 1712 }
1713 1713 stmf_free(sl->sl_lu);
1714 1714 return (ret);
1715 1715 }
1716 1716
1717 1717 int
1718 1718 sbd_create_register_lu(sbd_create_and_reg_lu_t *slu, int struct_sz,
1719 1719 uint32_t *err_ret)
1720 1720 {
1721 1721 char *namebuf;
1722 1722 sbd_lu_t *sl;
1723 1723 stmf_lu_t *lu;
1724 1724 char *p;
1725 1725 int sz;
1726 1726 int alloc_sz;
1727 1727 int ret = EIO;
1728 1728 int flag;
1729 1729 int wcd = 0;
1730 1730 uint32_t hid = 0;
1731 1731 enum vtype vt;
1732 1732
1733 1733 sz = struct_sz - sizeof (sbd_create_and_reg_lu_t) + 8 + 1;
1734 1734
1735 1735 *err_ret = 0;
1736 1736
1737 1737 /* Lets validate various offsets */
1738 1738 if (((slu->slu_meta_fname_valid) &&
1739 1739 (slu->slu_meta_fname_off >= sz)) ||
1740 1740 (slu->slu_data_fname_off >= sz) ||
1741 1741 ((slu->slu_alias_valid) &&
1742 1742 (slu->slu_alias_off >= sz)) ||
1743 1743 ((slu->slu_mgmt_url_valid) &&
1744 1744 (slu->slu_mgmt_url_off >= sz)) ||
1745 1745 ((slu->slu_serial_valid) &&
1746 1746 ((slu->slu_serial_off + slu->slu_serial_size) >= sz))) {
1747 1747 return (EINVAL);
1748 1748 }
1749 1749
1750 1750 namebuf = kmem_zalloc(sz, KM_SLEEP);
1751 1751 bcopy(slu->slu_buf, namebuf, sz - 1);
1752 1752 namebuf[sz - 1] = 0;
1753 1753
1754 1754 alloc_sz = sizeof (sbd_lu_t) + sizeof (sbd_pgr_t);
1755 1755 if (slu->slu_meta_fname_valid) {
1756 1756 alloc_sz += strlen(namebuf + slu->slu_meta_fname_off) + 1;
1757 1757 }
1758 1758 alloc_sz += strlen(namebuf + slu->slu_data_fname_off) + 1;
1759 1759 if (slu->slu_alias_valid) {
1760 1760 alloc_sz += strlen(namebuf + slu->slu_alias_off) + 1;
1761 1761 }
1762 1762 if (slu->slu_mgmt_url_valid) {
1763 1763 alloc_sz += strlen(namebuf + slu->slu_mgmt_url_off) + 1;
1764 1764 }
1765 1765 if (slu->slu_serial_valid) {
1766 1766 alloc_sz += slu->slu_serial_size;
1767 1767 }
1768 1768
1769 1769 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU, alloc_sz, 0);
1770 1770 if (lu == NULL) {
1771 1771 kmem_free(namebuf, sz);
1772 1772 return (ENOMEM);
1773 1773 }
1774 1774 sl = (sbd_lu_t *)lu->lu_provider_private;
1775 1775 bzero(sl, alloc_sz);
1776 1776 sl->sl_lu = lu;
1777 1777 sl->sl_alloc_size = alloc_sz;
1778 1778 sl->sl_pgr = (sbd_pgr_t *)(sl + 1);
1779 1779 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL);
1780 1780 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL);
1781 1781 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL);
1782 1782 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL);
1783 1783 p = ((char *)sl) + sizeof (sbd_lu_t) + sizeof (sbd_pgr_t);
1784 1784 sl->sl_data_filename = p;
1785 1785 (void) strcpy(sl->sl_data_filename, namebuf + slu->slu_data_fname_off);
1786 1786 p += strlen(sl->sl_data_filename) + 1;
1787 1787 sl->sl_meta_offset = SBD_META_OFFSET;
1788 1788 sl->sl_access_state = SBD_LU_ACTIVE;
1789 1789 if (slu->slu_meta_fname_valid) {
1790 1790 sl->sl_alias = sl->sl_name = sl->sl_meta_filename = p;
1791 1791 (void) strcpy(sl->sl_meta_filename, namebuf +
1792 1792 slu->slu_meta_fname_off);
1793 1793 p += strlen(sl->sl_meta_filename) + 1;
1794 1794 } else {
1795 1795 sl->sl_alias = sl->sl_name = sl->sl_data_filename;
1796 1796 if (sbd_is_zvol(sl->sl_data_filename)) {
1797 1797 sl->sl_flags |= SL_ZFS_META;
1798 1798 sl->sl_meta_offset = 0;
1799 1799 } else {
1800 1800 sl->sl_flags |= SL_SHARED_META;
1801 1801 sl->sl_data_offset = SHARED_META_DATA_SIZE;
1802 1802 sl->sl_total_meta_size = SHARED_META_DATA_SIZE;
1803 1803 sl->sl_meta_size_used = 0;
1804 1804 }
1805 1805 }
1806 1806 if (slu->slu_alias_valid) {
1807 1807 sl->sl_alias = p;
1808 1808 (void) strcpy(p, namebuf + slu->slu_alias_off);
1809 1809 p += strlen(sl->sl_alias) + 1;
1810 1810 }
1811 1811 if (slu->slu_mgmt_url_valid) {
1812 1812 sl->sl_mgmt_url = p;
1813 1813 (void) strcpy(p, namebuf + slu->slu_mgmt_url_off);
1814 1814 p += strlen(sl->sl_mgmt_url) + 1;
1815 1815 }
1816 1816 if (slu->slu_serial_valid) {
1817 1817 sl->sl_serial_no = (uint8_t *)p;
1818 1818 bcopy(namebuf + slu->slu_serial_off, sl->sl_serial_no,
1819 1819 slu->slu_serial_size);
1820 1820 sl->sl_serial_no_size = slu->slu_serial_size;
1821 1821 p += slu->slu_serial_size;
1822 1822 }
1823 1823 kmem_free(namebuf, sz);
1824 1824 if (slu->slu_vid_valid) {
1825 1825 bcopy(slu->slu_vid, sl->sl_vendor_id, 8);
1826 1826 sl->sl_flags |= SL_VID_VALID;
1827 1827 }
1828 1828 if (slu->slu_pid_valid) {
1829 1829 bcopy(slu->slu_pid, sl->sl_product_id, 16);
1830 1830 sl->sl_flags |= SL_PID_VALID;
1831 1831 }
1832 1832 if (slu->slu_rev_valid) {
1833 1833 bcopy(slu->slu_rev, sl->sl_revision, 4);
1834 1834 sl->sl_flags |= SL_REV_VALID;
1835 1835 }
1836 1836 if (slu->slu_write_protected) {
1837 1837 sl->sl_flags |= SL_WRITE_PROTECTED;
1838 1838 }
1839 1839 if (slu->slu_blksize_valid) {
1840 1840 if (!ISP2(slu->slu_blksize) ||
1841 1841 (slu->slu_blksize > (32 * 1024)) ||
1842 1842 (slu->slu_blksize == 0)) {
1843 1843 *err_ret = SBD_RET_INVALID_BLKSIZE;
1844 1844 ret = EINVAL;
1845 1845 goto scm_err_out;
1846 1846 }
1847 1847 while ((1 << sl->sl_data_blocksize_shift) != slu->slu_blksize) {
1848 1848 sl->sl_data_blocksize_shift++;
1849 1849 }
1850 1850 } else {
1851 1851 sl->sl_data_blocksize_shift = 9; /* 512 by default */
1852 1852 slu->slu_blksize = 512;
1853 1853 }
1854 1854
1855 1855 /* Now lets start creating meta */
1856 1856 sl->sl_trans_op = SL_OP_CREATE_REGISTER_LU;
1857 1857 if (sbd_link_lu(sl) != SBD_SUCCESS) {
1858 1858 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED;
1859 1859 ret = EALREADY;
1860 1860 goto scm_err_out;
1861 1861 }
1862 1862
1863 1863 /* 1st focus on the data store */
1864 1864 if (slu->slu_lu_size_valid) {
1865 1865 sl->sl_lu_size = slu->slu_lu_size;
1866 1866 }
1867 1867 ret = sbd_open_data_file(sl, err_ret, slu->slu_lu_size_valid, 0, 0);
1868 1868 slu->slu_ret_filesize_nbits = sl->sl_data_fs_nbits;
1869 1869 slu->slu_lu_size = sl->sl_lu_size;
1870 1870 if (ret) {
1871 1871 goto scm_err_out;
1872 1872 }
1873 1873
1874 1874 /*
1875 1875 * Check if we were explicitly asked to disable/enable write
1876 1876 * cache on the device, otherwise get current device setting.
1877 1877 */
1878 1878 if (slu->slu_writeback_cache_disable_valid) {
1879 1879 if (slu->slu_writeback_cache_disable) {
1880 1880 /*
1881 1881 * Set write cache disable on the device. If it fails,
1882 1882 * we'll support it using sync/flush.
1883 1883 */
1884 1884 (void) sbd_wcd_set(1, sl);
1885 1885 wcd = 1;
1886 1886 } else {
1887 1887 /*
1888 1888 * Set write cache enable on the device. If it fails,
1889 1889 * return an error.
1890 1890 */
1891 1891 if (sbd_wcd_set(0, sl) != SBD_SUCCESS) {
1892 1892 *err_ret = SBD_RET_WRITE_CACHE_SET_FAILED;
1893 1893 ret = EFAULT;
1894 1894 goto scm_err_out;
1895 1895 }
1896 1896 }
1897 1897 } else {
1898 1898 sbd_wcd_get(&wcd, sl);
1899 1899 }
1900 1900
1901 1901 if (wcd) {
1902 1902 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE |
1903 1903 SL_SAVED_WRITE_CACHE_DISABLE;
1904 1904 }
1905 1905
1906 1906 if (sl->sl_flags & SL_SHARED_META) {
1907 1907 goto over_meta_open;
1908 1908 }
1909 1909 if (sl->sl_flags & SL_ZFS_META) {
1910 1910 if (sbd_create_zfs_meta_object(sl) != SBD_SUCCESS) {
1911 1911 *err_ret = SBD_RET_ZFS_META_CREATE_FAILED;
1912 1912 ret = ENOMEM;
1913 1913 goto scm_err_out;
1914 1914 }
1915 1915 sl->sl_meta_blocksize_shift = 0;
1916 1916 goto over_meta_create;
1917 1917 }
1918 1918 if ((ret = lookupname(sl->sl_meta_filename, UIO_SYSSPACE, FOLLOW,
1919 1919 NULLVPP, &sl->sl_meta_vp)) != 0) {
1920 1920 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED;
1921 1921 goto scm_err_out;
1922 1922 }
1923 1923 sl->sl_meta_vtype = vt = sl->sl_meta_vp->v_type;
1924 1924 VN_RELE(sl->sl_meta_vp);
1925 1925 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) {
1926 1926 *err_ret = SBD_RET_WRONG_META_FILE_TYPE;
1927 1927 ret = EINVAL;
1928 1928 goto scm_err_out;
1929 1929 }
1930 1930 if (vt == VREG) {
1931 1931 sl->sl_meta_blocksize_shift = 0;
1932 1932 } else {
1933 1933 sl->sl_meta_blocksize_shift = 9;
1934 1934 }
1935 1935 flag = FREAD | FWRITE | FOFFMAX | FEXCL;
1936 1936 if ((ret = vn_open(sl->sl_meta_filename, UIO_SYSSPACE, flag, 0,
1937 1937 &sl->sl_meta_vp, 0, 0)) != 0) {
1938 1938 *err_ret = SBD_RET_META_FILE_OPEN_FAILED;
1939 1939 goto scm_err_out;
1940 1940 }
1941 1941 over_meta_create:
1942 1942 sl->sl_total_meta_size = sl->sl_meta_offset + sizeof (sbd_meta_start_t);
1943 1943 sl->sl_total_meta_size +=
1944 1944 (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1;
1945 1945 sl->sl_total_meta_size &=
1946 1946 ~((((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1);
1947 1947 sl->sl_meta_size_used = 0;
1948 1948 over_meta_open:
1949 1949 sl->sl_flags |= SL_META_OPENED;
1950 1950
1951 1951 sl->sl_device_id[3] = 16;
1952 1952 if (slu->slu_guid_valid) {
1953 1953 sl->sl_device_id[0] = 0xf1;
1954 1954 sl->sl_device_id[1] = 3;
1955 1955 sl->sl_device_id[2] = 0;
1956 1956 bcopy(slu->slu_guid, sl->sl_device_id + 4, 16);
1957 1957 } else {
1958 1958 if (slu->slu_host_id_valid)
1959 1959 hid = slu->slu_host_id;
1960 1960 if (!slu->slu_company_id_valid)
1961 1961 slu->slu_company_id = COMPANY_ID_SUN;
1962 1962 if (stmf_scsilib_uniq_lu_id2(slu->slu_company_id, hid,
1963 1963 (scsi_devid_desc_t *)&sl->sl_device_id[0]) !=
1964 1964 STMF_SUCCESS) {
1965 1965 *err_ret = SBD_RET_META_CREATION_FAILED;
1966 1966 ret = EIO;
1967 1967 goto scm_err_out;
1968 1968 }
1969 1969 bcopy(sl->sl_device_id + 4, slu->slu_guid, 16);
1970 1970 }
1971 1971
1972 1972 /* Lets create the meta now */
1973 1973 mutex_enter(&sl->sl_metadata_lock);
1974 1974 if (sbd_write_meta_start(sl, sl->sl_total_meta_size,
1975 1975 sizeof (sbd_meta_start_t)) != SBD_SUCCESS) {
1976 1976 mutex_exit(&sl->sl_metadata_lock);
1977 1977 *err_ret = SBD_RET_META_CREATION_FAILED;
1978 1978 ret = EIO;
1979 1979 goto scm_err_out;
1980 1980 }
1981 1981 mutex_exit(&sl->sl_metadata_lock);
1982 1982 sl->sl_meta_size_used = sl->sl_meta_offset + sizeof (sbd_meta_start_t);
1983 1983
1984 1984 if (sbd_write_lu_info(sl) != SBD_SUCCESS) {
1985 1985 *err_ret = SBD_RET_META_CREATION_FAILED;
1986 1986 ret = EIO;
1987 1987 goto scm_err_out;
1988 1988 }
1989 1989
1990 1990 if (sbd_pgr_meta_init(sl) != SBD_SUCCESS) {
1991 1991 *err_ret = SBD_RET_META_CREATION_FAILED;
1992 1992 ret = EIO;
1993 1993 goto scm_err_out;
1994 1994 }
1995 1995
1996 1996 /*
1997 1997 * Update the zvol separately as this need only be called upon
1998 1998 * completion of the metadata initialization.
1999 1999 */
2000 2000 if (sl->sl_flags & SL_ZFS_META) {
2001 2001 if (sbd_update_zfs_prop(sl) != SBD_SUCCESS) {
2002 2002 *err_ret = SBD_RET_META_CREATION_FAILED;
2003 2003 ret = EIO;
2004 2004 goto scm_err_out;
2005 2005 }
2006 2006 }
2007 2007
2008 2008 ret = sbd_populate_and_register_lu(sl, err_ret);
2009 2009 if (ret) {
2010 2010 goto scm_err_out;
2011 2011 }
2012 2012
2013 2013 sl->sl_trans_op = SL_OP_NONE;
2014 2014 atomic_inc_32(&sbd_lu_count);
2015 2015 return (0);
2016 2016
2017 2017 scm_err_out:
2018 2018 return (sbd_close_delete_lu(sl, ret));
2019 2019 }
2020 2020
2021 2021 stmf_status_t
2022 2022 sbd_proxy_msg(uint8_t *luid, void *proxy_arg, uint32_t proxy_arg_len,
2023 2023 uint32_t type)
2024 2024 {
2025 2025 switch (type) {
2026 2026 case STMF_MSG_LU_ACTIVE:
2027 2027 return (sbd_proxy_reg_lu(luid, proxy_arg,
2028 2028 proxy_arg_len));
2029 2029 case STMF_MSG_LU_REGISTER:
2030 2030 return (sbd_proxy_reg_lu(luid, proxy_arg,
2031 2031 proxy_arg_len));
2032 2032 case STMF_MSG_LU_DEREGISTER:
2033 2033 return (sbd_proxy_dereg_lu(luid, proxy_arg,
2034 2034 proxy_arg_len));
2035 2035 default:
2036 2036 return (STMF_INVALID_ARG);
2037 2037 }
2038 2038 }
2039 2039
2040 2040
2041 2041 /*
2042 2042 * register a standby logical unit
2043 2043 * proxy_reg_arg contains the meta filename
2044 2044 */
2045 2045 stmf_status_t
2046 2046 sbd_proxy_reg_lu(uint8_t *luid, void *proxy_reg_arg, uint32_t proxy_reg_arg_len)
2047 2047 {
2048 2048 sbd_lu_t *sl;
2049 2049 sbd_status_t sret;
2050 2050 sbd_create_standby_lu_t *stlu;
2051 2051 int alloc_sz;
2052 2052 uint32_t err_ret = 0;
2053 2053 stmf_status_t stret = STMF_SUCCESS;
2054 2054
2055 2055 if (luid == NULL) {
2056 2056 return (STMF_INVALID_ARG);
2057 2057 }
2058 2058
2059 2059 do {
2060 2060 sret = sbd_find_and_lock_lu(luid, NULL, SL_OP_MODIFY_LU, &sl);
2061 2061 } while (sret == SBD_BUSY);
2062 2062
2063 2063 if (sret == SBD_NOT_FOUND) {
2064 2064 alloc_sz = sizeof (*stlu) + proxy_reg_arg_len - 8;
2065 2065 stlu = (sbd_create_standby_lu_t *)kmem_zalloc(alloc_sz,
2066 2066 KM_SLEEP);
2067 2067 bcopy(luid, stlu->stlu_guid, 16);
2068 2068 if (proxy_reg_arg_len) {
2069 2069 bcopy(proxy_reg_arg, stlu->stlu_meta_fname,
2070 2070 proxy_reg_arg_len);
2071 2071 stlu->stlu_meta_fname_size = proxy_reg_arg_len;
2072 2072 }
2073 2073 if (sbd_create_standby_lu(stlu, &err_ret) != 0) {
2074 2074 cmn_err(CE_WARN,
2075 2075 "Unable to create standby logical unit for %s",
2076 2076 stlu->stlu_meta_fname);
2077 2077 stret = STMF_FAILURE;
2078 2078 }
2079 2079 kmem_free(stlu, alloc_sz);
2080 2080 return (stret);
2081 2081 } else if (sret == SBD_SUCCESS) {
2082 2082 /*
2083 2083 * if the lu is already registered, then the lu should now
2084 2084 * be in standby mode
2085 2085 */
2086 2086 sbd_it_data_t *it;
2087 2087 if (sl->sl_access_state != SBD_LU_STANDBY) {
2088 2088 mutex_enter(&sl->sl_lock);
2089 2089 sl->sl_access_state = SBD_LU_STANDBY;
2090 2090 for (it = sl->sl_it_list; it != NULL;
2091 2091 it = it->sbd_it_next) {
2092 2092 it->sbd_it_ua_conditions |=
2093 2093 SBD_UA_ASYMMETRIC_ACCESS_CHANGED;
2094 2094 it->sbd_it_flags &=
2095 2095 ~SBD_IT_HAS_SCSI2_RESERVATION;
2096 2096 sl->sl_flags &= ~SL_LU_HAS_SCSI2_RESERVATION;
2097 2097 }
2098 2098 mutex_exit(&sl->sl_lock);
2099 2099 sbd_pgr_reset(sl);
2100 2100 }
2101 2101 sl->sl_trans_op = SL_OP_NONE;
2102 2102 } else {
2103 2103 cmn_err(CE_WARN, "could not find and lock logical unit");
2104 2104 stret = STMF_FAILURE;
2105 2105 }
2106 2106 out:
2107 2107 return (stret);
2108 2108 }
2109 2109
2110 2110 /* ARGSUSED */
2111 2111 stmf_status_t
2112 2112 sbd_proxy_dereg_lu(uint8_t *luid, void *proxy_reg_arg,
2113 2113 uint32_t proxy_reg_arg_len)
2114 2114 {
2115 2115 sbd_delete_lu_t dlu = {0};
2116 2116 uint32_t err_ret;
2117 2117
2118 2118 if (luid == NULL) {
2119 2119 cmn_err(CE_WARN, "de-register lu request had null luid");
2120 2120 return (STMF_INVALID_ARG);
2121 2121 }
2122 2122
2123 2123 bcopy(luid, &dlu.dlu_guid, 16);
2124 2124
2125 2125 if (sbd_delete_lu(&dlu, (int)sizeof (dlu), &err_ret) != 0) {
2126 2126 cmn_err(CE_WARN, "failed to delete de-register lu request");
2127 2127 return (STMF_FAILURE);
2128 2128 }
2129 2129
2130 2130 return (STMF_SUCCESS);
2131 2131 }
2132 2132
2133 2133 int
2134 2134 sbd_create_standby_lu(sbd_create_standby_lu_t *slu, uint32_t *err_ret)
2135 2135 {
2136 2136 sbd_lu_t *sl;
2137 2137 stmf_lu_t *lu;
2138 2138 int ret = EIO;
2139 2139 int alloc_sz;
2140 2140
2141 2141 alloc_sz = sizeof (sbd_lu_t) + sizeof (sbd_pgr_t) +
2142 2142 slu->stlu_meta_fname_size;
2143 2143 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU, alloc_sz, 0);
2144 2144 if (lu == NULL) {
2145 2145 return (ENOMEM);
2146 2146 }
2147 2147 sl = (sbd_lu_t *)lu->lu_provider_private;
2148 2148 bzero(sl, alloc_sz);
2149 2149 sl->sl_lu = lu;
2150 2150 sl->sl_alloc_size = alloc_sz;
2151 2151
2152 2152 sl->sl_pgr = (sbd_pgr_t *)(sl + 1);
2153 2153 sl->sl_meta_filename = ((char *)sl) + sizeof (sbd_lu_t) +
2154 2154 sizeof (sbd_pgr_t);
2155 2155
2156 2156 if (slu->stlu_meta_fname_size > 0) {
2157 2157 (void) strcpy(sl->sl_meta_filename, slu->stlu_meta_fname);
2158 2158 }
2159 2159 sl->sl_name = sl->sl_meta_filename;
2160 2160
2161 2161 sl->sl_device_id[3] = 16;
2162 2162 sl->sl_device_id[0] = 0xf1;
2163 2163 sl->sl_device_id[1] = 3;
2164 2164 sl->sl_device_id[2] = 0;
2165 2165 bcopy(slu->stlu_guid, sl->sl_device_id + 4, 16);
2166 2166 lu->lu_id = (scsi_devid_desc_t *)sl->sl_device_id;
2167 2167 sl->sl_access_state = SBD_LU_STANDBY;
2168 2168
2169 2169 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL);
2170 2170 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL);
2171 2171 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL);
2172 2172 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL);
2173 2173
2174 2174 sl->sl_trans_op = SL_OP_CREATE_REGISTER_LU;
2175 2175
2176 2176 if (sbd_link_lu(sl) != SBD_SUCCESS) {
2177 2177 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED;
2178 2178 ret = EALREADY;
2179 2179 goto scs_err_out;
2180 2180 }
2181 2181
2182 2182 ret = sbd_populate_and_register_lu(sl, err_ret);
2183 2183 if (ret) {
2184 2184 goto scs_err_out;
2185 2185 }
2186 2186
2187 2187 sl->sl_trans_op = SL_OP_NONE;
2188 2188 atomic_inc_32(&sbd_lu_count);
2189 2189 return (0);
2190 2190
2191 2191 scs_err_out:
2192 2192 return (sbd_close_delete_lu(sl, ret));
2193 2193 }
2194 2194
2195 2195 int
2196 2196 sbd_load_sli_1_0(sbd_lu_t *sl, uint32_t *err_ret)
2197 2197 {
2198 2198 sbd_lu_info_1_0_t *sli = NULL;
2199 2199 sbd_status_t sret;
2200 2200
2201 2201 sret = sbd_read_meta_section(sl, (sm_section_hdr_t **)&sli,
2202 2202 SMS_ID_LU_INFO_1_0);
2203 2203
2204 2204 if (sret != SBD_SUCCESS) {
2205 2205 *err_ret = SBD_RET_NO_META;
2206 2206 return (EIO);
2207 2207 }
2208 2208 if (sli->sli_data_order != SMS_DATA_ORDER) {
2209 2209 sbd_swap_lu_info_1_0(sli);
2210 2210 if (sli->sli_data_order != SMS_DATA_ORDER) {
2211 2211 kmem_free(sli, sli->sli_sms_header.sms_size);
2212 2212 *err_ret = SBD_RET_NO_META;
2213 2213 return (EIO);
2214 2214 }
2215 2215 }
2216 2216
2217 2217 sl->sl_flags |= SL_SHARED_META;
2218 2218 sl->sl_data_blocksize_shift = 9;
2219 2219 sl->sl_data_offset = SHARED_META_DATA_SIZE;
2220 2220 sl->sl_lu_size = sli->sli_total_store_size - SHARED_META_DATA_SIZE;
2221 2221 sl->sl_total_data_size = SHARED_META_DATA_SIZE + sl->sl_lu_size;
2222 2222 bcopy(sli->sli_lu_devid, sl->sl_device_id, 20);
2223 2223
2224 2224 kmem_free(sli, sli->sli_sms_header.sms_size);
2225 2225 return (0);
2226 2226 }
2227 2227
2228 2228 int
2229 2229 sbd_import_lu(sbd_import_lu_t *ilu, int struct_sz, uint32_t *err_ret,
2230 2230 int no_register, sbd_lu_t **slr)
2231 2231 {
2232 2232 stmf_lu_t *lu;
2233 2233 sbd_lu_t *sl;
2234 2234 sbd_lu_info_1_1_t *sli = NULL;
2235 2235 int asz;
2236 2236 int ret = 0;
2237 2237 stmf_status_t stret;
2238 2238 int flag;
2239 2239 int wcd = 0;
2240 2240 int data_opened;
2241 2241 uint16_t sli_buf_sz;
2242 2242 uint8_t *sli_buf_copy = NULL;
2243 2243 enum vtype vt;
2244 2244 int standby = 0;
2245 2245 sbd_status_t sret;
2246 2246
2247 2247 if (no_register && slr == NULL) {
2248 2248 return (EINVAL);
2249 2249 }
2250 2250 ilu->ilu_meta_fname[struct_sz - sizeof (*ilu) + 8 - 1] = 0;
2251 2251 /*
2252 2252 * check whether logical unit is already registered ALUA
2253 2253 * For a standby logical unit, the meta filename is set. Use
2254 2254 * that to search for an existing logical unit.
2255 2255 */
2256 2256 sret = sbd_find_and_lock_lu(NULL, (uint8_t *)&(ilu->ilu_meta_fname),
2257 2257 SL_OP_IMPORT_LU, &sl);
2258 2258
2259 2259 if (sret == SBD_SUCCESS) {
2260 2260 if (sl->sl_access_state != SBD_LU_ACTIVE) {
2261 2261 no_register = 1;
2262 2262 standby = 1;
2263 2263 lu = sl->sl_lu;
2264 2264 if (sl->sl_alias_alloc_size) {
2265 2265 kmem_free(sl->sl_alias,
2266 2266 sl->sl_alias_alloc_size);
2267 2267 sl->sl_alias_alloc_size = 0;
2268 2268 sl->sl_alias = NULL;
2269 2269 lu->lu_alias = NULL;
2270 2270 }
2271 2271 if (sl->sl_meta_filename == NULL) {
2272 2272 sl->sl_meta_filename = sl->sl_data_filename;
2273 2273 } else if (sl->sl_data_fname_alloc_size) {
2274 2274 kmem_free(sl->sl_data_filename,
2275 2275 sl->sl_data_fname_alloc_size);
2276 2276 sl->sl_data_fname_alloc_size = 0;
2277 2277 }
2278 2278 if (sl->sl_serial_no_alloc_size) {
2279 2279 kmem_free(sl->sl_serial_no,
2280 2280 sl->sl_serial_no_alloc_size);
2281 2281 sl->sl_serial_no_alloc_size = 0;
2282 2282 }
2283 2283 if (sl->sl_mgmt_url_alloc_size) {
2284 2284 kmem_free(sl->sl_mgmt_url,
2285 2285 sl->sl_mgmt_url_alloc_size);
2286 2286 sl->sl_mgmt_url_alloc_size = 0;
2287 2287 }
2288 2288 } else {
2289 2289 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED;
2290 2290 bcopy(sl->sl_device_id + 4, ilu->ilu_ret_guid, 16);
2291 2291 sl->sl_trans_op = SL_OP_NONE;
2292 2292 return (EALREADY);
2293 2293 }
2294 2294 } else if (sret == SBD_NOT_FOUND) {
2295 2295 asz = strlen(ilu->ilu_meta_fname) + 1;
2296 2296
2297 2297 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU,
2298 2298 sizeof (sbd_lu_t) + sizeof (sbd_pgr_t) + asz, 0);
2299 2299 if (lu == NULL) {
2300 2300 return (ENOMEM);
2301 2301 }
2302 2302 sl = (sbd_lu_t *)lu->lu_provider_private;
2303 2303 bzero(sl, sizeof (*sl));
2304 2304 sl->sl_lu = lu;
2305 2305 sl->sl_pgr = (sbd_pgr_t *)(sl + 1);
2306 2306 sl->sl_meta_filename = ((char *)sl) + sizeof (*sl) +
2307 2307 sizeof (sbd_pgr_t);
2308 2308 (void) strcpy(sl->sl_meta_filename, ilu->ilu_meta_fname);
2309 2309 sl->sl_name = sl->sl_meta_filename;
2310 2310 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL);
2311 2311 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL);
2312 2312 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL);
2313 2313 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL);
2314 2314 sl->sl_trans_op = SL_OP_IMPORT_LU;
2315 2315 } else {
2316 2316 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED;
2317 2317 return (EIO);
2318 2318 }
2319 2319
2320 2320 /* we're only loading the metadata */
2321 2321 if (!no_register) {
2322 2322 if (sbd_link_lu(sl) != SBD_SUCCESS) {
2323 2323 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED;
2324 2324 bcopy(sl->sl_device_id + 4, ilu->ilu_ret_guid, 16);
2325 2325 ret = EALREADY;
2326 2326 goto sim_err_out;
2327 2327 }
2328 2328 }
2329 2329 if ((ret = lookupname(sl->sl_meta_filename, UIO_SYSSPACE, FOLLOW,
2330 2330 NULLVPP, &sl->sl_meta_vp)) != 0) {
2331 2331 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED;
2332 2332 goto sim_err_out;
2333 2333 }
2334 2334 if (sbd_is_zvol(sl->sl_meta_filename)) {
2335 2335 sl->sl_flags |= SL_ZFS_META;
2336 2336 sl->sl_data_filename = sl->sl_meta_filename;
2337 2337 }
2338 2338 sl->sl_meta_vtype = vt = sl->sl_meta_vp->v_type;
2339 2339 VN_RELE(sl->sl_meta_vp);
2340 2340 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) {
2341 2341 *err_ret = SBD_RET_WRONG_META_FILE_TYPE;
2342 2342 ret = EINVAL;
2343 2343 goto sim_err_out;
2344 2344 }
2345 2345 if (sl->sl_flags & SL_ZFS_META) {
2346 2346 if (sbd_open_zfs_meta(sl) != SBD_SUCCESS) {
2347 2347 /* let see if metadata is in the 64k block */
2348 2348 sl->sl_flags &= ~SL_ZFS_META;
2349 2349 }
2350 2350 }
2351 2351 if (!(sl->sl_flags & SL_ZFS_META)) {
2352 2352 /* metadata is always writable */
2353 2353 flag = FREAD | FWRITE | FOFFMAX | FEXCL;
2354 2354 if ((ret = vn_open(sl->sl_meta_filename, UIO_SYSSPACE, flag, 0,
2355 2355 &sl->sl_meta_vp, 0, 0)) != 0) {
2356 2356 *err_ret = SBD_RET_META_FILE_OPEN_FAILED;
2357 2357 goto sim_err_out;
2358 2358 }
2359 2359 }
2360 2360 if ((sl->sl_flags & SL_ZFS_META) || (vt == VREG)) {
2361 2361 sl->sl_meta_blocksize_shift = 0;
2362 2362 } else {
2363 2363 sl->sl_meta_blocksize_shift = 9;
2364 2364 }
2365 2365 sl->sl_meta_offset = (sl->sl_flags & SL_ZFS_META) ? 0 : SBD_META_OFFSET;
2366 2366 sl->sl_flags |= SL_META_OPENED;
2367 2367
2368 2368 mutex_enter(&sl->sl_metadata_lock);
2369 2369 sret = sbd_load_meta_start(sl);
2370 2370 mutex_exit(&sl->sl_metadata_lock);
2371 2371 if (sret != SBD_SUCCESS) {
2372 2372 if (sret == SBD_META_CORRUPTED) {
2373 2373 *err_ret = SBD_RET_NO_META;
2374 2374 } else if (sret == SBD_NOT_SUPPORTED) {
2375 2375 *err_ret = SBD_RET_VERSION_NOT_SUPPORTED;
2376 2376 } else {
2377 2377 *err_ret = SBD_RET_NO_META;
2378 2378 }
2379 2379 ret = EINVAL;
2380 2380 goto sim_err_out;
2381 2381 }
2382 2382
2383 2383 /* Now lets see if we can read the most recent LU info */
2384 2384 sret = sbd_read_meta_section(sl, (sm_section_hdr_t **)&sli,
2385 2385 SMS_ID_LU_INFO_1_1);
2386 2386 if ((sret == SBD_NOT_FOUND) && ((sl->sl_flags & SL_ZFS_META) == 0)) {
2387 2387 ret = sbd_load_sli_1_0(sl, err_ret);
2388 2388 if (ret) {
2389 2389 goto sim_err_out;
2390 2390 }
2391 2391 goto sim_sli_loaded;
2392 2392 }
2393 2393 if (sret != SBD_SUCCESS) {
2394 2394 *err_ret = SBD_RET_NO_META;
2395 2395 ret = EIO;
2396 2396 goto sim_err_out;
2397 2397 }
2398 2398 /* load sli 1.1 */
2399 2399 if (sli->sli_data_order != SMS_DATA_ORDER) {
2400 2400 sbd_swap_lu_info_1_1(sli);
2401 2401 if (sli->sli_data_order != SMS_DATA_ORDER) {
2402 2402 *err_ret = SBD_RET_NO_META;
2403 2403 ret = EIO;
2404 2404 goto sim_err_out;
2405 2405 }
2406 2406 }
2407 2407
2408 2408 sli_buf_sz = sli->sli_sms_header.sms_size -
2409 2409 sizeof (sbd_lu_info_1_1_t) + 8;
2410 2410 sli_buf_copy = kmem_alloc(sli_buf_sz + 1, KM_SLEEP);
2411 2411 bcopy(sli->sli_buf, sli_buf_copy, sli_buf_sz);
2412 2412 sli_buf_copy[sli_buf_sz] = 0;
2413 2413
2414 2414 /* Make sure all the offsets are within limits */
2415 2415 if (((sli->sli_flags & SLI_META_FNAME_VALID) &&
2416 2416 (sli->sli_meta_fname_offset > sli_buf_sz)) ||
2417 2417 ((sli->sli_flags & SLI_DATA_FNAME_VALID) &&
2418 2418 (sli->sli_data_fname_offset > sli_buf_sz)) ||
2419 2419 ((sli->sli_flags & SLI_MGMT_URL_VALID) &&
2420 2420 (sli->sli_mgmt_url_offset > sli_buf_sz)) ||
2421 2421 ((sli->sli_flags & SLI_SERIAL_VALID) &&
2422 2422 ((sli->sli_serial_offset + sli->sli_serial_size) > sli_buf_sz)) ||
2423 2423 ((sli->sli_flags & SLI_ALIAS_VALID) &&
2424 2424 (sli->sli_alias_offset > sli_buf_sz))) {
2425 2425 *err_ret = SBD_RET_NO_META;
2426 2426 ret = EIO;
2427 2427 goto sim_err_out;
2428 2428 }
2429 2429
2430 2430 sl->sl_lu_size = sli->sli_lu_size;
2431 2431 sl->sl_data_blocksize_shift = sli->sli_data_blocksize_shift;
2432 2432 bcopy(sli->sli_device_id, sl->sl_device_id, 20);
2433 2433 if (sli->sli_flags & SLI_SERIAL_VALID) {
2434 2434 sl->sl_serial_no_size = sl->sl_serial_no_alloc_size =
2435 2435 sli->sli_serial_size;
2436 2436 sl->sl_serial_no = kmem_zalloc(sli->sli_serial_size, KM_SLEEP);
2437 2437 bcopy(sli_buf_copy + sli->sli_serial_offset, sl->sl_serial_no,
2438 2438 sl->sl_serial_no_size);
2439 2439 }
2440 2440 if (sli->sli_flags & SLI_SEPARATE_META) {
2441 2441 sl->sl_total_data_size = sl->sl_lu_size;
2442 2442 if (sli->sli_flags & SLI_DATA_FNAME_VALID) {
2443 2443 sl->sl_data_fname_alloc_size = strlen((char *)
2444 2444 sli_buf_copy + sli->sli_data_fname_offset) + 1;
2445 2445 sl->sl_data_filename = kmem_zalloc(
2446 2446 sl->sl_data_fname_alloc_size, KM_SLEEP);
2447 2447 (void) strcpy(sl->sl_data_filename,
2448 2448 (char *)sli_buf_copy + sli->sli_data_fname_offset);
2449 2449 }
2450 2450 } else {
2451 2451 if (sl->sl_flags & SL_ZFS_META) {
2452 2452 sl->sl_total_data_size = sl->sl_lu_size;
2453 2453 sl->sl_data_offset = 0;
2454 2454 } else {
2455 2455 sl->sl_total_data_size =
2456 2456 sl->sl_lu_size + SHARED_META_DATA_SIZE;
2457 2457 sl->sl_data_offset = SHARED_META_DATA_SIZE;
2458 2458 sl->sl_flags |= SL_SHARED_META;
2459 2459 }
2460 2460 }
2461 2461 if (sli->sli_flags & SLI_ALIAS_VALID) {
2462 2462 sl->sl_alias_alloc_size = strlen((char *)sli_buf_copy +
2463 2463 sli->sli_alias_offset) + 1;
2464 2464 sl->sl_alias = kmem_alloc(sl->sl_alias_alloc_size, KM_SLEEP);
2465 2465 (void) strcpy(sl->sl_alias, (char *)sli_buf_copy +
2466 2466 sli->sli_alias_offset);
2467 2467 }
2468 2468 if (sli->sli_flags & SLI_MGMT_URL_VALID) {
2469 2469 sl->sl_mgmt_url_alloc_size = strlen((char *)sli_buf_copy +
2470 2470 sli->sli_mgmt_url_offset) + 1;
2471 2471 sl->sl_mgmt_url = kmem_alloc(sl->sl_mgmt_url_alloc_size,
2472 2472 KM_SLEEP);
2473 2473 (void) strcpy(sl->sl_mgmt_url, (char *)sli_buf_copy +
2474 2474 sli->sli_mgmt_url_offset);
2475 2475 }
2476 2476 if (sli->sli_flags & SLI_WRITE_PROTECTED) {
2477 2477 sl->sl_flags |= SL_WRITE_PROTECTED;
2478 2478 }
2479 2479 if (sli->sli_flags & SLI_VID_VALID) {
2480 2480 sl->sl_flags |= SL_VID_VALID;
2481 2481 bcopy(sli->sli_vid, sl->sl_vendor_id, 8);
2482 2482 }
2483 2483 if (sli->sli_flags & SLI_PID_VALID) {
2484 2484 sl->sl_flags |= SL_PID_VALID;
2485 2485 bcopy(sli->sli_pid, sl->sl_product_id, 16);
2486 2486 }
2487 2487 if (sli->sli_flags & SLI_REV_VALID) {
2488 2488 sl->sl_flags |= SL_REV_VALID;
2489 2489 bcopy(sli->sli_rev, sl->sl_revision, 4);
2490 2490 }
2491 2491 if (sli->sli_flags & SLI_WRITEBACK_CACHE_DISABLE) {
2492 2492 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE;
2493 2493 }
2494 2494 sim_sli_loaded:
2495 2495 if ((sl->sl_flags & SL_SHARED_META) == 0) {
2496 2496 data_opened = 0;
2497 2497 } else {
2498 2498 data_opened = 1;
2499 2499 sl->sl_data_filename = sl->sl_meta_filename;
2500 2500 sl->sl_data_vp = sl->sl_meta_vp;
2501 2501 sl->sl_data_vtype = sl->sl_meta_vtype;
2502 2502 }
2503 2503
2504 2504 sret = sbd_pgr_meta_load(sl);
2505 2505 if (sret != SBD_SUCCESS) {
2506 2506 *err_ret = SBD_RET_NO_META;
2507 2507 ret = EIO;
2508 2508 goto sim_err_out;
2509 2509 }
2510 2510
2511 2511 ret = sbd_open_data_file(sl, err_ret, 1, data_opened, 0);
2512 2512 if (ret) {
2513 2513 goto sim_err_out;
2514 2514 }
2515 2515
2516 2516 /*
2517 2517 * set write cache disable on the device
2518 2518 * Note: this shouldn't fail on import unless the cache capabilities
2519 2519 * of the device changed. If that happened, modify will need to
2520 2520 * be used to set the cache flag appropriately after import is done.
2521 2521 */
2522 2522 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) {
2523 2523 (void) sbd_wcd_set(1, sl);
2524 2524 wcd = 1;
2525 2525 /*
2526 2526 * if not explicitly set, attempt to set it to enable, if that fails
2527 2527 * get the current setting and use that
2528 2528 */
2529 2529 } else {
2530 2530 sret = sbd_wcd_set(0, sl);
2531 2531 if (sret != SBD_SUCCESS) {
2532 2532 sbd_wcd_get(&wcd, sl);
2533 2533 }
2534 2534 }
2535 2535
2536 2536 if (wcd) {
2537 2537 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE |
2538 2538 SL_SAVED_WRITE_CACHE_DISABLE;
2539 2539 }
2540 2540
2541 2541 /* we're only loading the metadata */
2542 2542 if (!no_register) {
2543 2543 ret = sbd_populate_and_register_lu(sl, err_ret);
2544 2544 if (ret) {
2545 2545 goto sim_err_out;
2546 2546 }
2547 2547 atomic_inc_32(&sbd_lu_count);
2548 2548 }
2549 2549
2550 2550 bcopy(sl->sl_device_id + 4, ilu->ilu_ret_guid, 16);
2551 2551 sl->sl_trans_op = SL_OP_NONE;
2552 2552
2553 2553 if (sli) {
2554 2554 kmem_free(sli, sli->sli_sms_header.sms_size);
2555 2555 sli = NULL;
2556 2556 }
2557 2557 if (sli_buf_copy) {
2558 2558 kmem_free(sli_buf_copy, sli_buf_sz + 1);
2559 2559 sli_buf_copy = NULL;
2560 2560 }
2561 2561 if (no_register && !standby) {
2562 2562 *slr = sl;
2563 2563 }
2564 2564
2565 2565 /*
2566 2566 * if this was imported from standby, set the access state
2567 2567 * to active.
2568 2568 */
2569 2569 if (standby) {
2570 2570 sbd_it_data_t *it;
2571 2571 mutex_enter(&sl->sl_lock);
2572 2572 sl->sl_access_state = SBD_LU_ACTIVE;
2573 2573 for (it = sl->sl_it_list; it != NULL;
2574 2574 it = it->sbd_it_next) {
2575 2575 it->sbd_it_ua_conditions |=
2576 2576 SBD_UA_ASYMMETRIC_ACCESS_CHANGED;
2577 2577 it->sbd_it_ua_conditions |= SBD_UA_POR;
2578 2578 it->sbd_it_flags |= SBD_IT_PGR_CHECK_FLAG;
2579 2579 }
2580 2580 mutex_exit(&sl->sl_lock);
2581 2581 /* call set access state */
2582 2582 stret = stmf_set_lu_access(lu, STMF_LU_ACTIVE);
2583 2583 if (stret != STMF_SUCCESS) {
2584 2584 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
2585 2585 sl->sl_access_state = SBD_LU_STANDBY;
2586 2586 goto sim_err_out;
2587 2587 }
2588 2588 if (sl->sl_alias) {
2589 2589 lu->lu_alias = sl->sl_alias;
2590 2590 } else {
2591 2591 lu->lu_alias = sl->sl_name;
2592 2592 }
2593 2593 }
2594 2594 sl->sl_access_state = SBD_LU_ACTIVE;
2595 2595 return (0);
2596 2596
2597 2597 sim_err_out:
2598 2598 if (sli) {
2599 2599 kmem_free(sli, sli->sli_sms_header.sms_size);
2600 2600 sli = NULL;
2601 2601 }
2602 2602 if (sli_buf_copy) {
2603 2603 kmem_free(sli_buf_copy, sli_buf_sz + 1);
2604 2604 sli_buf_copy = NULL;
2605 2605 }
2606 2606
2607 2607 if (standby) {
2608 2608 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
2609 2609 sl->sl_trans_op = SL_OP_NONE;
2610 2610 return (EIO);
2611 2611 } else {
2612 2612 return (sbd_close_delete_lu(sl, ret));
2613 2613 }
2614 2614 }
2615 2615
2616 2616 int
2617 2617 sbd_modify_lu(sbd_modify_lu_t *mlu, int struct_sz, uint32_t *err_ret)
2618 2618 {
2619 2619 sbd_lu_t *sl = NULL;
2620 2620 uint16_t alias_sz;
2621 2621 int ret = 0;
2622 2622 sbd_it_data_t *it;
2623 2623 sbd_status_t sret;
2624 2624 uint64_t old_size;
2625 2625 int modify_unregistered = 0;
2626 2626 int ua = 0;
2627 2627 sbd_import_lu_t *ilu;
2628 2628 stmf_lu_t *lu;
2629 2629 uint32_t ilu_sz;
2630 2630 uint32_t sz;
2631 2631
2632 2632 sz = struct_sz - sizeof (*mlu) + 8 + 1;
2633 2633
2634 2634 /* if there is data in the buf, null terminate it */
2635 2635 if (struct_sz > sizeof (*mlu)) {
2636 2636 mlu->mlu_buf[struct_sz - sizeof (*mlu) + 8 - 1] = 0;
2637 2637 }
2638 2638
2639 2639 *err_ret = 0;
2640 2640
2641 2641 /* Lets validate offsets */
2642 2642 if (((mlu->mlu_alias_valid) &&
2643 2643 (mlu->mlu_alias_off >= sz)) ||
2644 2644 ((mlu->mlu_mgmt_url_valid) &&
2645 2645 (mlu->mlu_mgmt_url_off >= sz)) ||
2646 2646 (mlu->mlu_by_fname) &&
2647 2647 (mlu->mlu_fname_off >= sz)) {
2648 2648 return (EINVAL);
2649 2649 }
2650 2650
2651 2651 /*
2652 2652 * We'll look for the device but if we don't find it registered,
2653 2653 * we'll still try to modify the unregistered device.
2654 2654 */
2655 2655 if (mlu->mlu_by_guid) {
2656 2656 sret = sbd_find_and_lock_lu(mlu->mlu_input_guid, NULL,
2657 2657 SL_OP_MODIFY_LU, &sl);
2658 2658 } else if (mlu->mlu_by_fname) {
2659 2659 sret = sbd_find_and_lock_lu(NULL,
2660 2660 (uint8_t *)&(mlu->mlu_buf[mlu->mlu_fname_off]),
2661 2661 SL_OP_MODIFY_LU, &sl);
2662 2662 } else {
2663 2663 return (EINVAL);
2664 2664 }
2665 2665
2666 2666
2667 2667 if (sret != SBD_SUCCESS) {
2668 2668 if (sret == SBD_BUSY) {
2669 2669 *err_ret = SBD_RET_LU_BUSY;
2670 2670 return (EBUSY);
2671 2671 } else if (sret != SBD_NOT_FOUND) {
2672 2672 return (EIO);
2673 2673 } else if (!mlu->mlu_by_fname) {
2674 2674 return (EINVAL);
2675 2675 }
2676 2676 /* Okay, try to import the device */
2677 2677 struct_sz = max(8, strlen(&(mlu->mlu_buf[mlu->mlu_fname_off]))
2678 2678 + 1);
2679 2679 struct_sz += sizeof (sbd_import_lu_t) - 8;
2680 2680 ilu_sz = struct_sz;
2681 2681 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP);
2682 2682 ilu->ilu_struct_size = struct_sz;
2683 2683 (void) strcpy(ilu->ilu_meta_fname,
2684 2684 &(mlu->mlu_buf[mlu->mlu_fname_off]));
2685 2685 ret = sbd_import_lu(ilu, struct_sz, err_ret, 1, &sl);
2686 2686 kmem_free(ilu, ilu_sz);
2687 2687 if (ret != SBD_SUCCESS) {
2688 2688 return (ENOENT);
2689 2689 }
2690 2690 modify_unregistered = 1;
2691 2691 }
2692 2692
2693 2693 if (sl->sl_access_state != SBD_LU_ACTIVE) {
2694 2694 *err_ret = SBD_RET_ACCESS_STATE_FAILED;
2695 2695 ret = EINVAL;
2696 2696 goto smm_err_out;
2697 2697 }
2698 2698
2699 2699 /* check for write cache change */
2700 2700 if (mlu->mlu_writeback_cache_disable_valid) {
2701 2701 /* set wce on device */
2702 2702 sret = sbd_wcd_set(mlu->mlu_writeback_cache_disable, sl);
2703 2703 if (!mlu->mlu_writeback_cache_disable && sret != SBD_SUCCESS) {
2704 2704 *err_ret = SBD_RET_WRITE_CACHE_SET_FAILED;
2705 2705 ret = EFAULT;
2706 2706 goto smm_err_out;
2707 2707 }
2708 2708 mutex_enter(&sl->sl_lock);
2709 2709 if (!mlu->mlu_writeback_cache_disable) {
2710 2710 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) {
2711 2711 ua = 1;
2712 2712 sl->sl_flags &= ~SL_WRITEBACK_CACHE_DISABLE;
2713 2713 sl->sl_flags &= ~SL_SAVED_WRITE_CACHE_DISABLE;
2714 2714 }
2715 2715 } else {
2716 2716 if ((sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) == 0) {
2717 2717 ua = 1;
2718 2718 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE;
2719 2719 sl->sl_flags |= SL_SAVED_WRITE_CACHE_DISABLE;
2720 2720 }
2721 2721 }
2722 2722 for (it = sl->sl_it_list; ua && it != NULL;
2723 2723 it = it->sbd_it_next) {
2724 2724 it->sbd_it_ua_conditions |=
2725 2725 SBD_UA_MODE_PARAMETERS_CHANGED;
2726 2726 }
2727 2727 mutex_exit(&sl->sl_lock);
2728 2728 }
2729 2729 ua = 0;
2730 2730
2731 2731 if (mlu->mlu_alias_valid) {
2732 2732 alias_sz = strlen((char *)mlu->mlu_buf +
2733 2733 mlu->mlu_alias_off) + 1;
2734 2734 /*
2735 2735 * Use the allocated buffer or alloc a new one.
2736 2736 * Don't copy into sl_alias if sl_alias_alloc_size is 0
2737 2737 * otherwise or you'll be writing over the data/metadata
2738 2738 * filename.
2739 2739 */
2740 2740 mutex_enter(&sl->sl_lock);
2741 2741 if (sl->sl_alias_alloc_size > 0 &&
2742 2742 sl->sl_alias_alloc_size < alias_sz) {
2743 2743 kmem_free(sl->sl_alias,
2744 2744 sl->sl_alias_alloc_size);
2745 2745 sl->sl_alias_alloc_size = 0;
2746 2746 }
2747 2747 if (sl->sl_alias_alloc_size == 0) {
2748 2748 sl->sl_alias = kmem_alloc(alias_sz, KM_SLEEP);
2749 2749 sl->sl_alias_alloc_size = alias_sz;
2750 2750 }
2751 2751 (void) strcpy(sl->sl_alias, (char *)mlu->mlu_buf +
2752 2752 mlu->mlu_alias_off);
2753 2753 lu = sl->sl_lu;
2754 2754 lu->lu_alias = sl->sl_alias;
2755 2755 mutex_exit(&sl->sl_lock);
2756 2756 }
2757 2757
2758 2758 if (mlu->mlu_mgmt_url_valid) {
2759 2759 uint16_t url_sz;
2760 2760
2761 2761 url_sz = strlen((char *)mlu->mlu_buf + mlu->mlu_mgmt_url_off);
2762 2762 if (url_sz > 0)
2763 2763 url_sz++;
2764 2764
2765 2765 mutex_enter(&sl->sl_lock);
2766 2766 if (sl->sl_mgmt_url_alloc_size > 0 &&
2767 2767 (url_sz == 0 || sl->sl_mgmt_url_alloc_size < url_sz)) {
2768 2768 kmem_free(sl->sl_mgmt_url, sl->sl_mgmt_url_alloc_size);
2769 2769 sl->sl_mgmt_url = NULL;
2770 2770 sl->sl_mgmt_url_alloc_size = 0;
2771 2771 }
2772 2772 if (url_sz > 0) {
2773 2773 if (sl->sl_mgmt_url_alloc_size == 0) {
2774 2774 sl->sl_mgmt_url = kmem_alloc(url_sz, KM_SLEEP);
2775 2775 sl->sl_mgmt_url_alloc_size = url_sz;
2776 2776 }
2777 2777 (void) strcpy(sl->sl_mgmt_url, (char *)mlu->mlu_buf +
2778 2778 mlu->mlu_mgmt_url_off);
2779 2779 }
2780 2780 for (it = sl->sl_it_list; it != NULL;
2781 2781 it = it->sbd_it_next) {
2782 2782 it->sbd_it_ua_conditions |=
2783 2783 SBD_UA_MODE_PARAMETERS_CHANGED;
2784 2784 }
2785 2785 mutex_exit(&sl->sl_lock);
2786 2786 }
2787 2787
2788 2788 if (mlu->mlu_write_protected_valid) {
2789 2789 mutex_enter(&sl->sl_lock);
2790 2790 if (mlu->mlu_write_protected) {
2791 2791 if ((sl->sl_flags & SL_WRITE_PROTECTED) == 0) {
2792 2792 ua = 1;
2793 2793 sl->sl_flags |= SL_WRITE_PROTECTED;
2794 2794 }
2795 2795 } else {
2796 2796 if (sl->sl_flags & SL_WRITE_PROTECTED) {
2797 2797 ua = 1;
2798 2798 sl->sl_flags &= ~SL_WRITE_PROTECTED;
2799 2799 }
2800 2800 }
2801 2801 for (it = sl->sl_it_list; ua && it != NULL;
2802 2802 it = it->sbd_it_next) {
2803 2803 it->sbd_it_ua_conditions |=
2804 2804 SBD_UA_MODE_PARAMETERS_CHANGED;
2805 2805 }
2806 2806 mutex_exit(&sl->sl_lock);
2807 2807 }
2808 2808
2809 2809 if (mlu->mlu_lu_size_valid) {
2810 2810 /*
2811 2811 * validate lu size and set
2812 2812 * For open file only (registered lu)
2813 2813 */
2814 2814 mutex_enter(&sl->sl_lock);
2815 2815 old_size = sl->sl_lu_size;
2816 2816 sl->sl_lu_size = mlu->mlu_lu_size;
2817 2817 mutex_exit(&sl->sl_lock);
2818 2818 ret = sbd_open_data_file(sl, err_ret, 1, 1, 1);
2819 2819 if (ret) {
2820 2820 mutex_enter(&sl->sl_lock);
2821 2821 sl->sl_lu_size = old_size;
2822 2822 mutex_exit(&sl->sl_lock);
2823 2823 goto smm_err_out;
2824 2824 }
2825 2825 if (old_size != mlu->mlu_lu_size) {
2826 2826 mutex_enter(&sl->sl_lock);
2827 2827 for (it = sl->sl_it_list; it != NULL;
2828 2828 it = it->sbd_it_next) {
2829 2829 it->sbd_it_ua_conditions |=
2830 2830 SBD_UA_CAPACITY_CHANGED;
2831 2831 }
2832 2832 mutex_exit(&sl->sl_lock);
2833 2833 }
2834 2834 }
2835 2835
2836 2836 if (sbd_write_lu_info(sl) != SBD_SUCCESS) {
2837 2837 *err_ret = SBD_RET_META_CREATION_FAILED;
2838 2838 ret = EIO;
2839 2839 }
2840 2840
2841 2841 smm_err_out:
2842 2842 if (modify_unregistered) {
2843 2843 (void) sbd_close_delete_lu(sl, 0);
2844 2844 } else {
2845 2845 sl->sl_trans_op = SL_OP_NONE;
2846 2846 }
2847 2847 return (ret);
2848 2848 }
2849 2849
2850 2850 int
2851 2851 sbd_set_global_props(sbd_global_props_t *mlu, int struct_sz,
2852 2852 uint32_t *err_ret)
2853 2853 {
2854 2854 sbd_lu_t *sl = NULL;
2855 2855 int ret = 0;
2856 2856 sbd_it_data_t *it;
2857 2857 uint32_t sz;
2858 2858
2859 2859 sz = struct_sz - sizeof (*mlu) + 8 + 1;
2860 2860
2861 2861 /* if there is data in the buf, null terminate it */
2862 2862 if (struct_sz > sizeof (*mlu)) {
2863 2863 mlu->mlu_buf[struct_sz - sizeof (*mlu) + 8 - 1] = 0;
2864 2864 }
2865 2865
2866 2866 *err_ret = 0;
2867 2867
2868 2868 /* Lets validate offsets */
2869 2869 if (((mlu->mlu_mgmt_url_valid) &&
2870 2870 (mlu->mlu_mgmt_url_off >= sz))) {
2871 2871 return (EINVAL);
2872 2872 }
2873 2873
2874 2874 if (mlu->mlu_mgmt_url_valid) {
2875 2875 uint16_t url_sz;
2876 2876
2877 2877 url_sz = strlen((char *)mlu->mlu_buf + mlu->mlu_mgmt_url_off);
2878 2878 if (url_sz > 0)
2879 2879 url_sz++;
2880 2880
2881 2881 rw_enter(&sbd_global_prop_lock, RW_WRITER);
2882 2882 if (sbd_mgmt_url_alloc_size > 0 &&
2883 2883 (url_sz == 0 || sbd_mgmt_url_alloc_size < url_sz)) {
2884 2884 kmem_free(sbd_mgmt_url, sbd_mgmt_url_alloc_size);
2885 2885 sbd_mgmt_url = NULL;
2886 2886 sbd_mgmt_url_alloc_size = 0;
2887 2887 }
2888 2888 if (url_sz > 0) {
2889 2889 if (sbd_mgmt_url_alloc_size == 0) {
2890 2890 sbd_mgmt_url = kmem_alloc(url_sz, KM_SLEEP);
2891 2891 sbd_mgmt_url_alloc_size = url_sz;
2892 2892 }
2893 2893 (void) strcpy(sbd_mgmt_url, (char *)mlu->mlu_buf +
2894 2894 mlu->mlu_mgmt_url_off);
2895 2895 }
2896 2896 /*
2897 2897 * check each lu to determine whether a UA is needed.
2898 2898 */
2899 2899 mutex_enter(&sbd_lock);
2900 2900 for (sl = sbd_lu_list; sl; sl = sl->sl_next) {
2901 2901 if (sl->sl_mgmt_url) {
2902 2902 continue;
2903 2903 }
2904 2904 mutex_enter(&sl->sl_lock);
2905 2905 for (it = sl->sl_it_list; it != NULL;
2906 2906 it = it->sbd_it_next) {
2907 2907 it->sbd_it_ua_conditions |=
2908 2908 SBD_UA_MODE_PARAMETERS_CHANGED;
2909 2909 }
2910 2910 mutex_exit(&sl->sl_lock);
2911 2911 }
2912 2912 mutex_exit(&sbd_lock);
2913 2913 rw_exit(&sbd_global_prop_lock);
2914 2914 }
2915 2915 return (ret);
2916 2916 }
2917 2917
2918 2918 /* ARGSUSED */
2919 2919 int
2920 2920 sbd_delete_locked_lu(sbd_lu_t *sl, uint32_t *err_ret,
2921 2921 stmf_state_change_info_t *ssi)
2922 2922 {
2923 2923 int i;
2924 2924 stmf_status_t ret;
2925 2925
2926 2926 if ((sl->sl_state == STMF_STATE_OFFLINE) &&
2927 2927 !sl->sl_state_not_acked) {
2928 2928 goto sdl_do_dereg;
2929 2929 }
2930 2930
2931 2931 if ((sl->sl_state != STMF_STATE_ONLINE) ||
2932 2932 sl->sl_state_not_acked) {
2933 2933 return (EBUSY);
2934 2934 }
2935 2935
2936 2936 ret = stmf_ctl(STMF_CMD_LU_OFFLINE, sl->sl_lu, ssi);
2937 2937 if ((ret != STMF_SUCCESS) && (ret != STMF_ALREADY)) {
2938 2938 return (EBUSY);
2939 2939 }
2940 2940
2941 2941 for (i = 0; i < 500; i++) {
2942 2942 if ((sl->sl_state == STMF_STATE_OFFLINE) &&
2943 2943 !sl->sl_state_not_acked) {
2944 2944 goto sdl_do_dereg;
2945 2945 }
2946 2946 delay(drv_usectohz(10000));
2947 2947 }
2948 2948 return (EBUSY);
2949 2949
2950 2950 sdl_do_dereg:;
2951 2951 if (stmf_deregister_lu(sl->sl_lu) != STMF_SUCCESS)
2952 2952 return (EBUSY);
2953 2953 atomic_dec_32(&sbd_lu_count);
2954 2954
2955 2955 return (sbd_close_delete_lu(sl, 0));
2956 2956 }
2957 2957
2958 2958 int
2959 2959 sbd_delete_lu(sbd_delete_lu_t *dlu, int struct_sz, uint32_t *err_ret)
2960 2960 {
2961 2961 sbd_lu_t *sl;
2962 2962 sbd_status_t sret;
2963 2963 stmf_state_change_info_t ssi;
2964 2964 int ret;
2965 2965
2966 2966 if (dlu->dlu_by_meta_name) {
2967 2967 ((char *)dlu)[struct_sz - 1] = 0;
2968 2968 sret = sbd_find_and_lock_lu(NULL, dlu->dlu_meta_name,
2969 2969 SL_OP_DELETE_LU, &sl);
2970 2970 } else {
2971 2971 sret = sbd_find_and_lock_lu(dlu->dlu_guid, NULL,
2972 2972 SL_OP_DELETE_LU, &sl);
2973 2973 }
2974 2974 if (sret != SBD_SUCCESS) {
2975 2975 if (sret == SBD_BUSY) {
2976 2976 *err_ret = SBD_RET_LU_BUSY;
2977 2977 return (EBUSY);
2978 2978 } else if (sret == SBD_NOT_FOUND) {
2979 2979 *err_ret = SBD_RET_NOT_FOUND;
2980 2980 return (ENOENT);
2981 2981 }
2982 2982 return (EIO);
2983 2983 }
2984 2984
2985 2985 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
2986 2986 ssi.st_additional_info = "sbd_delete_lu call (ioctl)";
2987 2987 ret = sbd_delete_locked_lu(sl, err_ret, &ssi);
2988 2988
2989 2989 if (ret) {
2990 2990 /* Once its locked, no need to grab mutex again */
2991 2991 sl->sl_trans_op = SL_OP_NONE;
2992 2992 }
2993 2993 return (ret);
2994 2994 }
2995 2995
2996 2996 sbd_status_t
2997 2997 sbd_data_read(sbd_lu_t *sl, struct scsi_task *task,
2998 2998 uint64_t offset, uint64_t size, uint8_t *buf)
2999 2999 {
3000 3000 int ret;
3001 3001 long resid;
3002 3002
3003 3003 if ((offset + size) > sl->sl_lu_size) {
3004 3004 return (SBD_IO_PAST_EOF);
3005 3005 }
3006 3006
3007 3007 offset += sl->sl_data_offset;
3008 3008
3009 3009 if ((offset + size) > sl->sl_data_readable_size) {
3010 3010 uint64_t store_end;
3011 3011 if (offset > sl->sl_data_readable_size) {
3012 3012 bzero(buf, size);
3013 3013 return (SBD_SUCCESS);
3014 3014 }
3015 3015 store_end = sl->sl_data_readable_size - offset;
3016 3016 bzero(buf + store_end, size - store_end);
3017 3017 size = store_end;
3018 3018 }
3019 3019
3020 3020 DTRACE_PROBE5(backing__store__read__start, sbd_lu_t *, sl,
3021 3021 uint8_t *, buf, uint64_t, size, uint64_t, offset,
3022 3022 scsi_task_t *, task);
3023 3023
3024 3024 /*
3025 3025 * Don't proceed if the device has been closed
3026 3026 * This can occur on an access state change to standby or
3027 3027 * a delete. The writer lock is acquired before closing the
3028 3028 * lu.
3029 3029 */
3030 3030 rw_enter(&sl->sl_access_state_lock, RW_READER);
3031 3031 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0) {
3032 3032 rw_exit(&sl->sl_access_state_lock);
3033 3033 return (SBD_FAILURE);
3034 3034 }
3035 3035 ret = vn_rdwr(UIO_READ, sl->sl_data_vp, (caddr_t)buf, (ssize_t)size,
3036 3036 (offset_t)offset, UIO_SYSSPACE, 0, RLIM64_INFINITY, CRED(),
3037 3037 &resid);
3038 3038 rw_exit(&sl->sl_access_state_lock);
3039 3039
3040 3040 DTRACE_PROBE6(backing__store__read__end, sbd_lu_t *, sl,
3041 3041 uint8_t *, buf, uint64_t, size, uint64_t, offset,
3042 3042 int, ret, scsi_task_t *, task);
3043 3043
3044 3044 over_sl_data_read:
3045 3045 if (ret || resid) {
3046 3046 stmf_trace(0, "UIO_READ failed, ret = %d, resid = %d", ret,
3047 3047 resid);
3048 3048 return (SBD_FAILURE);
3049 3049 }
3050 3050
3051 3051 return (SBD_SUCCESS);
3052 3052 }
3053 3053
3054 3054 sbd_status_t
3055 3055 sbd_data_write(sbd_lu_t *sl, struct scsi_task *task,
3056 3056 uint64_t offset, uint64_t size, uint8_t *buf)
3057 3057 {
3058 3058 int ret;
3059 3059 long resid;
3060 3060 sbd_status_t sret = SBD_SUCCESS;
3061 3061 int ioflag;
3062 3062
3063 3063 if ((offset + size) > sl->sl_lu_size) {
3064 3064 return (SBD_IO_PAST_EOF);
3065 3065 }
3066 3066
3067 3067 offset += sl->sl_data_offset;
3068 3068
3069 3069 if ((sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) &&
3070 3070 (sl->sl_flags & SL_FLUSH_ON_DISABLED_WRITECACHE)) {
3071 3071 ioflag = FSYNC;
3072 3072 } else {
3073 3073 ioflag = 0;
3074 3074 }
3075 3075
3076 3076 DTRACE_PROBE5(backing__store__write__start, sbd_lu_t *, sl,
3077 3077 uint8_t *, buf, uint64_t, size, uint64_t, offset,
3078 3078 scsi_task_t *, task);
3079 3079
3080 3080 /*
3081 3081 * Don't proceed if the device has been closed
3082 3082 * This can occur on an access state change to standby or
3083 3083 * a delete. The writer lock is acquired before closing the
3084 3084 * lu.
3085 3085 */
3086 3086 rw_enter(&sl->sl_access_state_lock, RW_READER);
3087 3087 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0) {
3088 3088 rw_exit(&sl->sl_access_state_lock);
3089 3089 return (SBD_FAILURE);
3090 3090 }
3091 3091 ret = vn_rdwr(UIO_WRITE, sl->sl_data_vp, (caddr_t)buf, (ssize_t)size,
3092 3092 (offset_t)offset, UIO_SYSSPACE, ioflag, RLIM64_INFINITY, CRED(),
3093 3093 &resid);
3094 3094 rw_exit(&sl->sl_access_state_lock);
3095 3095
3096 3096 DTRACE_PROBE6(backing__store__write__end, sbd_lu_t *, sl,
3097 3097 uint8_t *, buf, uint64_t, size, uint64_t, offset,
3098 3098 int, ret, scsi_task_t *, task);
3099 3099
3100 3100 if ((ret == 0) && (resid == 0) &&
3101 3101 (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) &&
3102 3102 (sl->sl_flags & SL_FLUSH_ON_DISABLED_WRITECACHE)) {
3103 3103 sret = sbd_flush_data_cache(sl, 1);
3104 3104 }
3105 3105 over_sl_data_write:
3106 3106
3107 3107 if ((ret || resid) || (sret != SBD_SUCCESS)) {
3108 3108 return (SBD_FAILURE);
3109 3109 } else if ((offset + size) > sl->sl_data_readable_size) {
3110 3110 uint64_t old_size, new_size;
3111 3111
3112 3112 do {
3113 3113 old_size = sl->sl_data_readable_size;
3114 3114 if ((offset + size) <= old_size)
3115 3115 break;
3116 3116 new_size = offset + size;
3117 3117 } while (atomic_cas_64(&sl->sl_data_readable_size, old_size,
3118 3118 new_size) != old_size);
3119 3119 }
3120 3120
3121 3121 return (SBD_SUCCESS);
3122 3122 }
3123 3123
3124 3124 int
3125 3125 sbd_get_global_props(sbd_global_props_t *oslp, uint32_t oslp_sz,
3126 3126 uint32_t *err_ret)
3127 3127 {
3128 3128 uint32_t sz = 0;
3129 3129 uint16_t off;
3130 3130
3131 3131 rw_enter(&sbd_global_prop_lock, RW_READER);
3132 3132 if (sbd_mgmt_url) {
3133 3133 sz += strlen(sbd_mgmt_url) + 1;
3134 3134 }
3135 3135 bzero(oslp, sizeof (*oslp) - 8);
3136 3136 oslp->mlu_buf_size_needed = sz;
3137 3137
3138 3138 if (sz > (oslp_sz - sizeof (*oslp) + 8)) {
3139 3139 *err_ret = SBD_RET_INSUFFICIENT_BUF_SPACE;
3140 3140 rw_exit(&sbd_global_prop_lock);
3141 3141 return (ENOMEM);
3142 3142 }
3143 3143
3144 3144 off = 0;
3145 3145 if (sbd_mgmt_url) {
3146 3146 oslp->mlu_mgmt_url_valid = 1;
3147 3147 oslp->mlu_mgmt_url_off = off;
3148 3148 (void) strcpy((char *)&oslp->mlu_buf[off], sbd_mgmt_url);
3149 3149 off += strlen(sbd_mgmt_url) + 1;
3150 3150 }
3151 3151
3152 3152 rw_exit(&sbd_global_prop_lock);
3153 3153 return (0);
3154 3154 }
3155 3155
3156 3156 static int
3157 3157 sbd_get_unmap_props(sbd_unmap_props_t *sup,
3158 3158 sbd_unmap_props_t *osup, uint32_t *err_ret)
3159 3159 {
3160 3160 sbd_status_t sret;
3161 3161 sbd_lu_t *sl = NULL;
3162 3162
3163 3163 if (sup->sup_guid_valid) {
3164 3164 sret = sbd_find_and_lock_lu(sup->sup_guid,
3165 3165 NULL, SL_OP_LU_PROPS, &sl);
3166 3166 } else {
3167 3167 sret = sbd_find_and_lock_lu(NULL,
3168 3168 (uint8_t *)sup->sup_zvol_path, SL_OP_LU_PROPS,
3169 3169 &sl);
3170 3170 }
3171 3171 if (sret != SBD_SUCCESS) {
3172 3172 if (sret == SBD_BUSY) {
3173 3173 *err_ret = SBD_RET_LU_BUSY;
3174 3174 return (EBUSY);
3175 3175 } else if (sret == SBD_NOT_FOUND) {
3176 3176 *err_ret = SBD_RET_NOT_FOUND;
3177 3177 return (ENOENT);
3178 3178 }
3179 3179 return (EIO);
3180 3180 }
3181 3181
3182 3182 sup->sup_found_lu = 1;
3183 3183 sup->sup_guid_valid = 1;
3184 3184 bcopy(sl->sl_device_id + 4, sup->sup_guid, 16);
3185 3185 if (sl->sl_flags & SL_UNMAP_ENABLED)
3186 3186 sup->sup_unmap_enabled = 1;
3187 3187 else
3188 3188 sup->sup_unmap_enabled = 0;
3189 3189
3190 3190 *osup = *sup;
3191 3191 sl->sl_trans_op = SL_OP_NONE;
3192 3192
3193 3193 return (0);
3194 3194 }
3195 3195
3196 3196 int
3197 3197 sbd_get_lu_props(sbd_lu_props_t *islp, uint32_t islp_sz,
3198 3198 sbd_lu_props_t *oslp, uint32_t oslp_sz, uint32_t *err_ret)
3199 3199 {
3200 3200 sbd_status_t sret;
3201 3201 sbd_lu_t *sl = NULL;
3202 3202 uint32_t sz;
3203 3203 uint16_t off;
3204 3204
3205 3205 if (islp->slp_input_guid) {
3206 3206 sret = sbd_find_and_lock_lu(islp->slp_guid, NULL,
3207 3207 SL_OP_LU_PROPS, &sl);
3208 3208 } else {
3209 3209 ((char *)islp)[islp_sz - 1] = 0;
3210 3210 sret = sbd_find_and_lock_lu(NULL, islp->slp_buf,
3211 3211 SL_OP_LU_PROPS, &sl);
3212 3212 }
3213 3213 if (sret != SBD_SUCCESS) {
3214 3214 if (sret == SBD_BUSY) {
3215 3215 *err_ret = SBD_RET_LU_BUSY;
3216 3216 return (EBUSY);
3217 3217 } else if (sret == SBD_NOT_FOUND) {
3218 3218 *err_ret = SBD_RET_NOT_FOUND;
3219 3219 return (ENOENT);
3220 3220 }
3221 3221 return (EIO);
3222 3222 }
3223 3223
3224 3224 sz = strlen(sl->sl_name) + 1;
3225 3225 if ((sl->sl_flags & (SL_ZFS_META | SL_SHARED_META)) == 0) {
3226 3226 if (sl->sl_data_filename) {
3227 3227 sz += strlen(sl->sl_data_filename) + 1;
3228 3228 }
3229 3229 }
3230 3230 sz += sl->sl_serial_no_size;
3231 3231 if (sl->sl_alias) {
3232 3232 sz += strlen(sl->sl_alias) + 1;
3233 3233 }
3234 3234
3235 3235 rw_enter(&sbd_global_prop_lock, RW_READER);
3236 3236 if (sl->sl_mgmt_url) {
3237 3237 sz += strlen(sl->sl_mgmt_url) + 1;
3238 3238 } else if (sbd_mgmt_url) {
3239 3239 sz += strlen(sbd_mgmt_url) + 1;
3240 3240 }
3241 3241 bzero(oslp, sizeof (*oslp) - 8);
3242 3242 oslp->slp_buf_size_needed = sz;
3243 3243
3244 3244 if (sz > (oslp_sz - sizeof (*oslp) + 8)) {
3245 3245 sl->sl_trans_op = SL_OP_NONE;
3246 3246 *err_ret = SBD_RET_INSUFFICIENT_BUF_SPACE;
3247 3247 rw_exit(&sbd_global_prop_lock);
3248 3248 return (ENOMEM);
3249 3249 }
3250 3250
3251 3251 off = 0;
3252 3252 (void) strcpy((char *)oslp->slp_buf, sl->sl_name);
3253 3253 oslp->slp_meta_fname_off = off;
3254 3254 off += strlen(sl->sl_name) + 1;
3255 3255 if ((sl->sl_flags & (SL_ZFS_META | SL_SHARED_META)) == 0) {
3256 3256 oslp->slp_meta_fname_valid = 1;
3257 3257 oslp->slp_separate_meta = 1;
3258 3258 if (sl->sl_data_filename) {
3259 3259 oslp->slp_data_fname_valid = 1;
3260 3260 oslp->slp_data_fname_off = off;
3261 3261 (void) strcpy((char *)&oslp->slp_buf[off],
3262 3262 sl->sl_data_filename);
3263 3263 off += strlen(sl->sl_data_filename) + 1;
3264 3264 }
3265 3265 } else {
3266 3266 oslp->slp_data_fname_valid = 1;
3267 3267 oslp->slp_data_fname_off = oslp->slp_meta_fname_off;
3268 3268 if (sl->sl_flags & SL_ZFS_META) {
3269 3269 oslp->slp_zfs_meta = 1;
3270 3270 }
3271 3271 }
3272 3272 if (sl->sl_alias) {
3273 3273 oslp->slp_alias_valid = 1;
3274 3274 oslp->slp_alias_off = off;
3275 3275 (void) strcpy((char *)&oslp->slp_buf[off], sl->sl_alias);
3276 3276 off += strlen(sl->sl_alias) + 1;
3277 3277 }
3278 3278 if (sl->sl_mgmt_url) {
3279 3279 oslp->slp_mgmt_url_valid = 1;
3280 3280 oslp->slp_mgmt_url_off = off;
3281 3281 (void) strcpy((char *)&oslp->slp_buf[off], sl->sl_mgmt_url);
3282 3282 off += strlen(sl->sl_mgmt_url) + 1;
3283 3283 } else if (sbd_mgmt_url) {
3284 3284 oslp->slp_mgmt_url_valid = 1;
3285 3285 oslp->slp_mgmt_url_off = off;
3286 3286 (void) strcpy((char *)&oslp->slp_buf[off], sbd_mgmt_url);
3287 3287 off += strlen(sbd_mgmt_url) + 1;
3288 3288 }
3289 3289 if (sl->sl_serial_no_size) {
3290 3290 oslp->slp_serial_off = off;
3291 3291 bcopy(sl->sl_serial_no, &oslp->slp_buf[off],
3292 3292 sl->sl_serial_no_size);
3293 3293 oslp->slp_serial_size = sl->sl_serial_no_size;
3294 3294 oslp->slp_serial_valid = 1;
3295 3295 off += sl->sl_serial_no_size;
3296 3296 }
3297 3297
3298 3298 oslp->slp_lu_size = sl->sl_lu_size;
3299 3299 oslp->slp_blksize = ((uint16_t)1) << sl->sl_data_blocksize_shift;
3300 3300
3301 3301 oslp->slp_access_state = sl->sl_access_state;
3302 3302
3303 3303 if (sl->sl_flags & SL_VID_VALID) {
3304 3304 oslp->slp_lu_vid = 1;
3305 3305 bcopy(sl->sl_vendor_id, oslp->slp_vid, 8);
3306 3306 } else {
3307 3307 bcopy(sbd_vendor_id, oslp->slp_vid, 8);
3308 3308 }
3309 3309 if (sl->sl_flags & SL_PID_VALID) {
3310 3310 oslp->slp_lu_pid = 1;
3311 3311 bcopy(sl->sl_product_id, oslp->slp_pid, 16);
3312 3312 } else {
3313 3313 bcopy(sbd_product_id, oslp->slp_pid, 16);
3314 3314 }
3315 3315 if (sl->sl_flags & SL_REV_VALID) {
3316 3316 oslp->slp_lu_rev = 1;
3317 3317 bcopy(sl->sl_revision, oslp->slp_rev, 4);
3318 3318 } else {
3319 3319 bcopy(sbd_revision, oslp->slp_rev, 4);
3320 3320 }
3321 3321 bcopy(sl->sl_device_id + 4, oslp->slp_guid, 16);
3322 3322
3323 3323 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE)
3324 3324 oslp->slp_writeback_cache_disable_cur = 1;
3325 3325 if (sl->sl_flags & SL_SAVED_WRITE_CACHE_DISABLE)
3326 3326 oslp->slp_writeback_cache_disable_saved = 1;
3327 3327 if (sl->sl_flags & SL_WRITE_PROTECTED)
3328 3328 oslp->slp_write_protected = 1;
3329 3329
3330 3330 sl->sl_trans_op = SL_OP_NONE;
3331 3331
3332 3332 rw_exit(&sbd_global_prop_lock);
3333 3333 return (0);
3334 3334 }
3335 3335
3336 3336 /*
3337 3337 * Returns an allocated string with the "<pool>/..." form of the zvol name.
3338 3338 */
3339 3339 static char *
3340 3340 sbd_get_zvol_name(sbd_lu_t *sl)
3341 3341 {
3342 3342 char *src;
3343 3343 char *p;
3344 3344
3345 3345 if (sl->sl_data_filename)
3346 3346 src = sl->sl_data_filename;
3347 3347 else
3348 3348 src = sl->sl_meta_filename;
3349 3349 /* There has to be a better way */
3350 3350 if (SBD_IS_ZVOL(src) != 0) {
3351 3351 ASSERT(0);
3352 3352 }
3353 3353 src += 14; /* Past /dev/zvol/dsk/ */
3354 3354 if (*src == '/')
3355 3355 src++; /* or /dev/zvol/rdsk/ */
3356 3356 p = (char *)kmem_alloc(strlen(src) + 1, KM_SLEEP);
3357 3357 (void) strcpy(p, src);
3358 3358 return (p);
3359 3359 }
3360 3360
3361 3361 /*
3362 3362 * this function creates a local metadata zvol property
3363 3363 */
3364 3364 sbd_status_t
3365 3365 sbd_create_zfs_meta_object(sbd_lu_t *sl)
3366 3366 {
3367 3367 /*
3368 3368 * -allocate 1/2 the property size, the zfs property
3369 3369 * is 8k in size and stored as ascii hex string, all
3370 3370 * we needed is 4k buffer to store the binary data.
3371 3371 * -initialize reader/write lock
3372 3372 */
3373 3373 if ((sl->sl_zfs_meta = kmem_zalloc(ZAP_MAXVALUELEN / 2, KM_SLEEP))
3374 3374 == NULL)
3375 3375 return (SBD_FAILURE);
3376 3376 rw_init(&sl->sl_zfs_meta_lock, NULL, RW_DRIVER, NULL);
3377 3377 return (SBD_SUCCESS);
3378 3378 }
3379 3379
3380 3380 char
3381 3381 sbd_ctoi(char c)
3382 3382 {
3383 3383 if ((c >= '0') && (c <= '9'))
3384 3384 c -= '0';
3385 3385 else if ((c >= 'A') && (c <= 'F'))
3386 3386 c = c - 'A' + 10;
3387 3387 else if ((c >= 'a') && (c <= 'f'))
3388 3388 c = c - 'a' + 10;
3389 3389 else
3390 3390 c = -1;
3391 3391 return (c);
3392 3392 }
3393 3393
3394 3394 /*
3395 3395 * read zvol property and convert to binary
3396 3396 */
3397 3397 sbd_status_t
3398 3398 sbd_open_zfs_meta(sbd_lu_t *sl)
3399 3399 {
3400 3400 char *meta = NULL, cl, ch;
3401 3401 int i;
3402 3402 char *tmp, *ptr;
3403 3403 uint64_t rc = SBD_SUCCESS;
3404 3404 int len;
3405 3405 char *file;
3406 3406
3407 3407 if (sl->sl_zfs_meta == NULL) {
3408 3408 if (sbd_create_zfs_meta_object(sl) == SBD_FAILURE)
3409 3409 return (SBD_FAILURE);
3410 3410 } else {
3411 3411 bzero(sl->sl_zfs_meta, (ZAP_MAXVALUELEN / 2));
3412 3412 }
3413 3413
3414 3414 rw_enter(&sl->sl_zfs_meta_lock, RW_WRITER);
3415 3415 file = sbd_get_zvol_name(sl);
3416 3416 if (sbd_zvolget(file, &meta)) {
3417 3417 rc = SBD_FAILURE;
3418 3418 goto done;
3419 3419 }
3420 3420 tmp = meta;
3421 3421 /* convert ascii hex to binary meta */
3422 3422 len = strlen(meta);
3423 3423 ptr = sl->sl_zfs_meta;
3424 3424 for (i = 0; i < len; i += 2) {
3425 3425 ch = sbd_ctoi(*tmp++);
3426 3426 cl = sbd_ctoi(*tmp++);
3427 3427 if (ch == -1 || cl == -1) {
3428 3428 rc = SBD_FAILURE;
3429 3429 break;
3430 3430 }
3431 3431 *ptr++ = (ch << 4) + cl;
3432 3432 }
3433 3433 done:
3434 3434 rw_exit(&sl->sl_zfs_meta_lock);
3435 3435 if (meta)
3436 3436 kmem_free(meta, len + 1);
3437 3437 kmem_free(file, strlen(file) + 1);
3438 3438 return (rc);
3439 3439 }
3440 3440
3441 3441 sbd_status_t
3442 3442 sbd_read_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, uint64_t off)
3443 3443 {
3444 3444 ASSERT(sl->sl_zfs_meta);
3445 3445 rw_enter(&sl->sl_zfs_meta_lock, RW_READER);
3446 3446 bcopy(&sl->sl_zfs_meta[off], buf, sz);
3447 3447 rw_exit(&sl->sl_zfs_meta_lock);
3448 3448 return (SBD_SUCCESS);
3449 3449 }
3450 3450
3451 3451 sbd_status_t
3452 3452 sbd_write_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, uint64_t off)
3453 3453 {
3454 3454 ASSERT(sl->sl_zfs_meta);
3455 3455 if ((off + sz) > (ZAP_MAXVALUELEN / 2 - 1)) {
3456 3456 return (SBD_META_CORRUPTED);
3457 3457 }
3458 3458 if ((off + sz) > sl->sl_meta_size_used) {
3459 3459 sl->sl_meta_size_used = off + sz;
3460 3460 if (sl->sl_total_meta_size < sl->sl_meta_size_used) {
3461 3461 uint64_t meta_align =
3462 3462 (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1;
3463 3463 sl->sl_total_meta_size = (sl->sl_meta_size_used +
3464 3464 meta_align) & (~meta_align);
3465 3465 }
3466 3466 }
3467 3467 rw_enter(&sl->sl_zfs_meta_lock, RW_WRITER);
3468 3468 bcopy(buf, &sl->sl_zfs_meta[off], sz);
3469 3469 rw_exit(&sl->sl_zfs_meta_lock);
3470 3470 /*
3471 3471 * During creation of a logical unit, sbd_update_zfs_prop will be
3472 3472 * called separately to avoid multiple calls as each meta section
3473 3473 * create/update will result in a call to sbd_write_zfs_meta().
3474 3474 * We only need to update the zvol once during create.
3475 3475 */
3476 3476 mutex_enter(&sl->sl_lock);
3477 3477 if (sl->sl_trans_op != SL_OP_CREATE_REGISTER_LU) {
3478 3478 mutex_exit(&sl->sl_lock);
3479 3479 return (sbd_update_zfs_prop(sl));
3480 3480 }
3481 3481 mutex_exit(&sl->sl_lock);
3482 3482 return (SBD_SUCCESS);
3483 3483 }
3484 3484
3485 3485 sbd_status_t
3486 3486 sbd_update_zfs_prop(sbd_lu_t *sl)
3487 3487 {
3488 3488 char *ptr, *ah_meta;
3489 3489 char *dp = NULL;
3490 3490 int i, num;
3491 3491 char *file;
3492 3492 sbd_status_t ret = SBD_SUCCESS;
3493 3493
3494 3494 ASSERT(sl->sl_zfs_meta);
3495 3495 ptr = ah_meta = kmem_zalloc(ZAP_MAXVALUELEN, KM_SLEEP);
3496 3496 rw_enter(&sl->sl_zfs_meta_lock, RW_READER);
3497 3497 /* convert local copy to ascii hex */
3498 3498 dp = sl->sl_zfs_meta;
3499 3499 for (i = 0; i < sl->sl_total_meta_size; i++, dp++) {
3500 3500 num = ((*dp) >> 4) & 0xF;
3501 3501 *ah_meta++ = (num < 10) ? (num + '0') : (num + ('a' - 10));
3502 3502 num = (*dp) & 0xF;
3503 3503 *ah_meta++ = (num < 10) ? (num + '0') : (num + ('a' - 10));
3504 3504 }
3505 3505 *ah_meta = NULL;
3506 3506 file = sbd_get_zvol_name(sl);
3507 3507 if (sbd_zvolset(file, (char *)ptr)) {
3508 3508 ret = SBD_META_CORRUPTED;
3509 3509 }
3510 3510 rw_exit(&sl->sl_zfs_meta_lock);
3511 3511 kmem_free(ptr, ZAP_MAXVALUELEN);
3512 3512 kmem_free(file, strlen(file) + 1);
3513 3513 return (ret);
3514 3514 }
3515 3515
3516 3516 int
3517 3517 sbd_is_zvol(char *path)
3518 3518 {
3519 3519 int is_zfs = 0;
3520 3520
3521 3521 if (SBD_IS_ZVOL(path) == 0)
3522 3522 is_zfs = 1;
3523 3523
3524 3524 return (is_zfs);
3525 3525 }
3526 3526
3527 3527 /*
3528 3528 * set write cache disable
3529 3529 * wcd - 1 = disable, 0 = enable
3530 3530 */
3531 3531 sbd_status_t
3532 3532 sbd_wcd_set(int wcd, sbd_lu_t *sl)
3533 3533 {
3534 3534 /* translate to wce bit */
3535 3535 int wce = wcd ? 0 : 1;
3536 3536 int ret;
3537 3537 sbd_status_t sret = SBD_SUCCESS;
3538 3538
3539 3539 mutex_enter(&sl->sl_lock);
3540 3540 sl->sl_flags &= ~SL_WRITEBACK_CACHE_SET_UNSUPPORTED;
3541 3541
3542 3542 if (sl->sl_data_vp->v_type == VREG) {
3543 3543 sl->sl_flags |= SL_FLUSH_ON_DISABLED_WRITECACHE;
3544 3544 goto done;
3545 3545 }
3546 3546
3547 3547 ret = VOP_IOCTL(sl->sl_data_vp, DKIOCSETWCE, (intptr_t)&wce, FKIOCTL,
3548 3548 kcred, NULL, NULL);
3549 3549 if (ret == 0) {
3550 3550 sl->sl_flags &= ~SL_WRITEBACK_CACHE_SET_UNSUPPORTED;
3551 3551 sl->sl_flags &= ~SL_FLUSH_ON_DISABLED_WRITECACHE;
3552 3552 } else {
3553 3553 sl->sl_flags |= SL_WRITEBACK_CACHE_SET_UNSUPPORTED;
3554 3554 sl->sl_flags |= SL_FLUSH_ON_DISABLED_WRITECACHE;
3555 3555 sret = SBD_FAILURE;
3556 3556 goto done;
3557 3557 }
3558 3558
3559 3559 done:
3560 3560 mutex_exit(&sl->sl_lock);
3561 3561 return (sret);
3562 3562 }
3563 3563
3564 3564 /*
3565 3565 * get write cache disable
3566 3566 * wcd - 1 = disable, 0 = enable
3567 3567 */
3568 3568 void
3569 3569 sbd_wcd_get(int *wcd, sbd_lu_t *sl)
3570 3570 {
3571 3571 int wce;
3572 3572 int ret;
3573 3573
3574 3574 if (sl->sl_data_vp->v_type == VREG) {
3575 3575 *wcd = 0;
3576 3576 return;
3577 3577 }
3578 3578
3579 3579 ret = VOP_IOCTL(sl->sl_data_vp, DKIOCGETWCE, (intptr_t)&wce, FKIOCTL,
3580 3580 kcred, NULL, NULL);
3581 3581 /* if write cache get failed, assume disabled */
3582 3582 if (ret) {
3583 3583 *wcd = 1;
3584 3584 } else {
3585 3585 /* translate to wcd bit */
3586 3586 *wcd = wce ? 0 : 1;
3587 3587 }
3588 3588 }
3589 3589
3590 3590 int
3591 3591 sbd_zvolget(char *zvol_name, char **comstarprop)
3592 3592 {
3593 3593 ldi_handle_t zfs_lh;
3594 3594 nvlist_t *nv = NULL, *nv2;
3595 3595 zfs_cmd_t *zc;
3596 3596 char *ptr;
3597 3597 int size = 1024;
3598 3598 int unused;
3599 3599 int rc;
3600 3600
3601 3601 if ((rc = ldi_open_by_name("/dev/zfs", FREAD | FWRITE, kcred,
3602 3602 &zfs_lh, sbd_zfs_ident)) != 0) {
3603 3603 cmn_err(CE_WARN, "ldi_open %d", rc);
3604 3604 return (ENXIO);
3605 3605 }
3606 3606
3607 3607 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
3608 3608 (void) strlcpy(zc->zc_name, zvol_name, sizeof (zc->zc_name));
3609 3609 again:
3610 3610 zc->zc_nvlist_dst = (uint64_t)(intptr_t)kmem_alloc(size,
3611 3611 KM_SLEEP);
3612 3612 zc->zc_nvlist_dst_size = size;
3613 3613 rc = ldi_ioctl(zfs_lh, ZFS_IOC_OBJSET_STATS, (intptr_t)zc,
3614 3614 FKIOCTL, kcred, &unused);
3615 3615 /*
3616 3616 * ENOMEM means the list is larger than what we've allocated
3617 3617 * ldi_ioctl will fail with ENOMEM only once
3618 3618 */
3619 3619 if (rc == ENOMEM) {
3620 3620 int newsize;
3621 3621 newsize = zc->zc_nvlist_dst_size;
3622 3622 kmem_free((void *)(uintptr_t)zc->zc_nvlist_dst, size);
3623 3623 size = newsize;
3624 3624 goto again;
3625 3625 } else if (rc != 0) {
3626 3626 goto out;
3627 3627 }
3628 3628 rc = nvlist_unpack((char *)(uintptr_t)zc->zc_nvlist_dst,
3629 3629 zc->zc_nvlist_dst_size, &nv, 0);
3630 3630 ASSERT(rc == 0); /* nvlist_unpack should not fail */
3631 3631 if ((rc = nvlist_lookup_nvlist(nv, "stmf_sbd_lu", &nv2)) == 0) {
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3632 3632 rc = nvlist_lookup_string(nv2, ZPROP_VALUE, &ptr);
3633 3633 if (rc != 0) {
3634 3634 cmn_err(CE_WARN, "couldn't get value");
3635 3635 } else {
3636 3636 *comstarprop = kmem_alloc(strlen(ptr) + 1,
3637 3637 KM_SLEEP);
3638 3638 (void) strcpy(*comstarprop, ptr);
3639 3639 }
3640 3640 }
3641 3641 out:
3642 - if (nv != NULL)
3643 - nvlist_free(nv);
3642 + nvlist_free(nv);
3644 3643 kmem_free((void *)(uintptr_t)zc->zc_nvlist_dst, size);
3645 3644 kmem_free(zc, sizeof (zfs_cmd_t));
3646 3645 (void) ldi_close(zfs_lh, FREAD|FWRITE, kcred);
3647 3646
3648 3647 return (rc);
3649 3648 }
3650 3649
3651 3650 int
3652 3651 sbd_zvolset(char *zvol_name, char *comstarprop)
3653 3652 {
3654 3653 ldi_handle_t zfs_lh;
3655 3654 nvlist_t *nv;
3656 3655 char *packed = NULL;
3657 3656 size_t len;
3658 3657 zfs_cmd_t *zc;
3659 3658 int unused;
3660 3659 int rc;
3661 3660
3662 3661 if ((rc = ldi_open_by_name("/dev/zfs", FREAD | FWRITE, kcred,
3663 3662 &zfs_lh, sbd_zfs_ident)) != 0) {
3664 3663 cmn_err(CE_WARN, "ldi_open %d", rc);
3665 3664 return (ENXIO);
3666 3665 }
3667 3666 (void) nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP);
3668 3667 (void) nvlist_add_string(nv, "stmf_sbd_lu", comstarprop);
3669 3668 if ((rc = nvlist_pack(nv, &packed, &len, NV_ENCODE_NATIVE, KM_SLEEP))) {
3670 3669 goto out;
3671 3670 }
3672 3671
3673 3672 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
3674 3673 (void) strlcpy(zc->zc_name, zvol_name, sizeof (zc->zc_name));
3675 3674 zc->zc_nvlist_src = (uint64_t)(intptr_t)packed;
3676 3675 zc->zc_nvlist_src_size = len;
3677 3676 rc = ldi_ioctl(zfs_lh, ZFS_IOC_SET_PROP, (intptr_t)zc,
3678 3677 FKIOCTL, kcred, &unused);
3679 3678 if (rc != 0) {
3680 3679 cmn_err(CE_NOTE, "ioctl failed %d", rc);
3681 3680 }
3682 3681 kmem_free(zc, sizeof (zfs_cmd_t));
3683 3682 if (packed)
3684 3683 kmem_free(packed, len);
3685 3684 out:
3686 3685 nvlist_free(nv);
3687 3686 (void) ldi_close(zfs_lh, FREAD|FWRITE, kcred);
3688 3687 return (rc);
3689 3688 }
3690 3689
3691 3690 /*
3692 3691 * Unmap a region in a volume. Currently only supported for zvols.
3693 3692 */
3694 3693 int
3695 3694 sbd_unmap(sbd_lu_t *sl, uint64_t offset, uint64_t length)
3696 3695 {
3697 3696 vnode_t *vp;
3698 3697 int unused;
3699 3698 dkioc_free_t df;
3700 3699
3701 3700 /* Right now, we only support UNMAP on zvols. */
3702 3701 if (!(sl->sl_flags & SL_ZFS_META))
3703 3702 return (EIO);
3704 3703
3705 3704 df.df_flags = (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) ?
3706 3705 DF_WAIT_SYNC : 0;
3707 3706 df.df_start = offset;
3708 3707 df.df_length = length;
3709 3708
3710 3709 /* Use the data vnode we have to send a fop_ioctl(). */
3711 3710 vp = sl->sl_data_vp;
3712 3711 if (vp == NULL) {
3713 3712 cmn_err(CE_WARN, "Cannot unmap - no vnode pointer.");
3714 3713 return (EIO);
3715 3714 }
3716 3715
3717 3716 return (VOP_IOCTL(vp, DKIOCFREE, (intptr_t)(&df), FKIOCTL, kcred,
3718 3717 &unused, NULL));
3719 3718 }
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