Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/io/lvm/mirror/mirror.c @ 6901:307e592cef33
6510471 svm overlap chain book keeping does not scale well
| author | jkennedy |
|---|---|
| date | Wed, 18 Jun 2008 08:22:31 -0700 |
| parents | cac85bf517af |
| children | 8599a7568728 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
|
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5 * Common Development and Distribution License (the "License"). |
|
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6 * You may not use this file except in compliance with the License. |
| 0 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
|
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22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 0 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 #include <sys/param.h> | |
| 29 #include <sys/systm.h> | |
| 30 #include <sys/conf.h> | |
| 31 #include <sys/file.h> | |
| 32 #include <sys/user.h> | |
| 33 #include <sys/uio.h> | |
| 34 #include <sys/t_lock.h> | |
| 35 #include <sys/buf.h> | |
| 36 #include <sys/dkio.h> | |
| 37 #include <sys/vtoc.h> | |
| 38 #include <sys/kmem.h> | |
| 39 #include <vm/page.h> | |
| 40 #include <sys/cmn_err.h> | |
| 41 #include <sys/sysmacros.h> | |
| 42 #include <sys/types.h> | |
| 43 #include <sys/mkdev.h> | |
| 44 #include <sys/stat.h> | |
| 45 #include <sys/open.h> | |
| 46 #include <sys/modctl.h> | |
| 47 #include <sys/ddi.h> | |
| 48 #include <sys/sunddi.h> | |
| 49 #include <sys/debug.h> | |
| 50 #include <sys/dklabel.h> | |
| 51 #include <vm/hat.h> | |
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52 #include <sys/lvm/mdvar.h> |
| 0 | 53 #include <sys/lvm/md_mirror.h> |
| 54 #include <sys/lvm/md_convert.h> | |
| 55 #include <sys/lvm/md_mddb.h> | |
| 56 #include <sys/esunddi.h> | |
| 57 | |
| 58 #include <sys/sysevent/eventdefs.h> | |
| 59 #include <sys/sysevent/svm.h> | |
| 60 #include <sys/lvm/mdmn_commd.h> | |
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61 #include <sys/avl.h> |
| 0 | 62 |
| 63 md_ops_t mirror_md_ops; | |
| 64 #ifndef lint | |
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65 char _depends_on[] = "drv/md"; |
| 0 | 66 md_ops_t *md_interface_ops = &mirror_md_ops; |
| 67 #endif | |
| 68 | |
| 69 extern mdq_anchor_t md_done_daemon; | |
| 70 extern mdq_anchor_t md_mstr_daemon; | |
| 71 extern mdq_anchor_t md_mirror_daemon; | |
| 72 extern mdq_anchor_t md_mirror_io_daemon; | |
| 73 extern mdq_anchor_t md_mirror_rs_daemon; | |
| 74 extern mdq_anchor_t md_mhs_daemon; | |
| 75 | |
| 76 extern unit_t md_nunits; | |
| 77 extern set_t md_nsets; | |
| 78 extern md_set_t md_set[]; | |
| 79 | |
| 80 extern int md_status; | |
| 81 extern clock_t md_hz; | |
| 82 | |
| 83 extern md_krwlock_t md_unit_array_rw; | |
| 84 extern kmutex_t md_mx; | |
| 85 extern kcondvar_t md_cv; | |
| 86 extern int md_mtioctl_cnt; | |
| 87 | |
| 88 daemon_request_t mirror_timeout; | |
| 89 static daemon_request_t hotspare_request; | |
| 90 static daemon_request_t mn_hs_request[MD_MAXSETS]; /* Multinode hs req */ | |
| 91 | |
| 92 int md_mirror_mcs_buf_off; | |
| 93 | |
| 94 /* Flags for mdmn_ksend_message to allow debugging */ | |
| 95 int md_mirror_msg_flags; | |
| 96 | |
| 97 #ifdef DEBUG | |
| 98 /* Flag to switch on debug messages */ | |
| 99 int mirror_debug_flag = 0; | |
| 100 #endif | |
| 101 | |
| 102 /* | |
| 103 * Struct used to hold count of DMR reads and the timestamp of last DMR read | |
| 104 * It is used to verify, using a debugger, that the DMR read ioctl has been | |
| 105 * executed. | |
| 106 */ | |
| 107 dmr_stats_t mirror_dmr_stats = {0, 0}; | |
| 108 | |
| 109 /* | |
| 110 * Mutex protecting list of non-failfast drivers. | |
| 111 */ | |
| 112 static kmutex_t non_ff_drv_mutex; | |
|
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113 extern char **non_ff_drivers; |
| 0 | 114 |
| 115 extern major_t md_major; | |
| 116 | |
| 117 /* | |
| 118 * Write-On-Write memory pool. | |
| 119 */ | |
| 120 static void copy_write_cont(wowhdr_t *wowhdr); | |
| 121 static kmem_cache_t *mirror_wowblk_cache = NULL; | |
| 122 static int md_wowbuf_size = 16384; | |
| 123 static size_t md_wowblk_size; | |
| 124 | |
| 125 /* | |
| 126 * This is a flag that allows: | |
| 127 * - disabling the write-on-write mechanism. | |
| 128 * - logging occurrences of write-on-write | |
| 129 * - switching wow handling procedure processing | |
| 130 * Counter for occurences of WOW. | |
| 131 */ | |
| 132 static uint_t md_mirror_wow_flg = 0; | |
| 133 static int md_mirror_wow_cnt = 0; | |
| 134 | |
| 135 /* | |
| 136 * Tunable to enable/disable dirty region | |
| 137 * processing when closing down a mirror. | |
| 138 */ | |
| 139 static int new_resync = 1; | |
| 140 kmem_cache_t *mirror_parent_cache = NULL; | |
| 141 kmem_cache_t *mirror_child_cache = NULL; | |
| 142 | |
| 143 extern int md_ff_disable; /* disable failfast */ | |
| 144 | |
| 145 static int mirror_map_write(mm_unit_t *, md_mcs_t *, md_mps_t *, int); | |
| 146 static void mirror_read_strategy(buf_t *, int, void *); | |
| 147 static void mirror_write_strategy(buf_t *, int, void *); | |
| 148 static void become_owner(daemon_queue_t *); | |
| 149 static int mirror_done(struct buf *cb); | |
| 150 static int mirror_done_common(struct buf *cb); | |
| 151 static void clear_retry_error(struct buf *cb); | |
| 152 | |
| 153 /* | |
| 154 * patchables | |
| 155 */ | |
| 156 int md_min_rr_size = 200; /* 2000 blocks, or 100k */ | |
| 157 int md_def_num_rr = 1000; /* Default number of dirty regions */ | |
| 158 | |
| 159 /* | |
| 160 * patchable to change delay before rescheduling mirror ownership request. | |
| 161 * Value is clock ticks, default 0.5 seconds | |
| 162 */ | |
| 163 clock_t md_mirror_owner_to = 500000; | |
| 164 | |
| 165 /*ARGSUSED1*/ | |
| 166 static int | |
| 167 mirror_parent_constructor(void *p, void *d1, int d2) | |
| 168 { | |
| 169 mutex_init(&((md_mps_t *)p)->ps_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 170 return (0); | |
| 171 } | |
| 172 | |
| 173 static void | |
| 174 mirror_parent_init(md_mps_t *ps) | |
| 175 { | |
| 176 bzero(ps, offsetof(md_mps_t, ps_mx)); | |
| 177 } | |
| 178 | |
| 179 /*ARGSUSED1*/ | |
| 180 static void | |
| 181 mirror_parent_destructor(void *p, void *d) | |
| 182 { | |
| 183 mutex_destroy(&((md_mps_t *)p)->ps_mx); | |
| 184 } | |
| 185 | |
| 186 /*ARGSUSED1*/ | |
| 187 static int | |
| 188 mirror_child_constructor(void *p, void *d1, int d2) | |
| 189 { | |
| 190 bioinit(&((md_mcs_t *)p)->cs_buf); | |
| 191 return (0); | |
| 192 } | |
| 193 | |
| 194 void | |
| 195 mirror_child_init(md_mcs_t *cs) | |
| 196 { | |
| 197 cs->cs_ps = NULL; | |
| 198 cs->cs_mdunit = 0; | |
| 199 md_bioreset(&cs->cs_buf); | |
| 200 } | |
| 201 | |
| 202 /*ARGSUSED1*/ | |
| 203 static void | |
| 204 mirror_child_destructor(void *p, void *d) | |
| 205 { | |
| 206 biofini(&((md_mcs_t *)p)->cs_buf); | |
| 207 } | |
| 208 | |
| 209 static void | |
| 210 mirror_wowblk_init(wowhdr_t *p) | |
| 211 { | |
| 212 bzero(p, md_wowblk_size); | |
| 213 } | |
| 214 | |
| 215 static void | |
| 216 send_poke_hotspares_msg(daemon_request_t *drq) | |
| 217 { | |
| 218 int rval; | |
| 219 md_mn_msg_pokehsp_t pokehsp; | |
| 220 md_mn_kresult_t *kresult; | |
| 221 set_t setno = (set_t)drq->dq.qlen; | |
| 222 | |
| 223 pokehsp.pokehsp_setno = setno; | |
| 224 | |
| 225 kresult = kmem_alloc(sizeof (md_mn_kresult_t), KM_SLEEP); | |
| 226 rval = mdmn_ksend_message(setno, MD_MN_MSG_POKE_HOTSPARES, | |
| 227 MD_MSGF_NO_LOG | MD_MSGF_NO_BCAST, (char *)&pokehsp, | |
| 228 sizeof (pokehsp), kresult); | |
| 229 | |
| 230 if (!MDMN_KSEND_MSG_OK(rval, kresult)) { | |
| 231 mdmn_ksend_show_error(rval, kresult, "POKE_HOTSPARES"); | |
| 232 cmn_err(CE_PANIC, | |
| 233 "ksend_message failure: POKE_HOTSPARES"); | |
| 234 } | |
| 235 kmem_free(kresult, sizeof (md_mn_kresult_t)); | |
| 236 | |
| 237 /* Allow further requests to use this set's queue structure */ | |
| 238 mutex_enter(&drq->dr_mx); | |
| 239 drq->dr_pending = 0; | |
| 240 mutex_exit(&drq->dr_mx); | |
| 241 } | |
| 242 | |
| 243 /* | |
| 244 * Send a poke_hotspares message to the master node. To avoid swamping the | |
| 245 * commd handler with requests we only send a message if there is not one | |
| 246 * already outstanding. We punt the request to a separate thread context as | |
| 247 * cannot afford to block waiting on the request to be serviced. This is | |
| 248 * essential when a reconfig cycle is in progress as any open() of a multinode | |
| 249 * metadevice may result in a livelock. | |
| 250 */ | |
| 251 static void | |
| 252 send_poke_hotspares(set_t setno) | |
| 253 { | |
| 254 daemon_request_t *drq = &mn_hs_request[setno]; | |
| 255 | |
| 256 mutex_enter(&drq->dr_mx); | |
| 257 if (drq->dr_pending == 0) { | |
| 258 drq->dr_pending = 1; | |
| 259 drq->dq.qlen = (int)setno; | |
| 260 daemon_request(&md_mhs_daemon, | |
| 261 send_poke_hotspares_msg, (daemon_queue_t *)drq, REQ_OLD); | |
| 262 } | |
| 263 mutex_exit(&drq->dr_mx); | |
| 264 } | |
| 265 | |
| 266 void | |
| 267 mirror_set_sm_state( | |
| 268 mm_submirror_t *sm, | |
| 269 mm_submirror_ic_t *smic, | |
| 270 sm_state_t newstate, | |
| 271 int force) | |
| 272 { | |
| 273 int compcnt; | |
| 274 int i; | |
| 275 int errcnt; | |
| 276 sm_state_t origstate; | |
| 277 md_m_shared_t *shared; | |
| 278 | |
| 279 if (force) { | |
| 280 sm->sm_state = newstate; | |
| 281 uniqtime32(&sm->sm_timestamp); | |
| 282 return; | |
| 283 } | |
| 284 | |
| 285 origstate = newstate; | |
| 286 | |
| 287 compcnt = (*(smic->sm_get_component_count))(sm->sm_dev, sm); | |
| 288 for (i = 0, errcnt = 0; i < compcnt; i++) { | |
| 289 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
| 290 (sm->sm_dev, sm, i); | |
| 291 if (shared->ms_state & (CS_ERRED | CS_LAST_ERRED)) | |
| 292 newstate |= SMS_COMP_ERRED; | |
| 293 if (shared->ms_state & (CS_RESYNC)) | |
| 294 newstate |= SMS_COMP_RESYNC; | |
| 295 if (shared->ms_state & CS_ERRED) | |
| 296 errcnt++; | |
| 297 } | |
| 298 | |
| 299 if ((newstate & (SMS_COMP_ERRED | SMS_COMP_RESYNC)) != 0) | |
| 300 newstate &= ~origstate; | |
| 301 | |
| 302 if (errcnt == compcnt) | |
| 303 newstate |= SMS_ALL_ERRED; | |
| 304 else | |
| 305 newstate &= ~SMS_ALL_ERRED; | |
| 306 | |
| 307 sm->sm_state = newstate; | |
| 308 uniqtime32(&sm->sm_timestamp); | |
| 309 } | |
| 310 | |
| 311 static int | |
| 312 mirror_geterror(mm_unit_t *un, int *smi, int *cip, int clr_error, | |
| 313 int frm_probe) | |
| 314 { | |
| 315 mm_submirror_t *sm; | |
| 316 mm_submirror_ic_t *smic; | |
| 317 md_m_shared_t *shared; | |
| 318 int ci; | |
| 319 int i; | |
| 320 int compcnt; | |
| 321 int open_comp; /* flag for open component */ | |
| 322 | |
| 323 for (i = *smi; i < NMIRROR; i++) { | |
| 324 sm = &un->un_sm[i]; | |
| 325 smic = &un->un_smic[i]; | |
| 326 | |
| 327 if (!SMS_IS(sm, SMS_INUSE)) | |
| 328 continue; | |
| 329 | |
| 330 compcnt = (*(smic->sm_get_component_count)) (sm->sm_dev, un); | |
| 331 for (ci = *cip; ci < compcnt; ci++) { | |
| 332 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
| 333 (sm->sm_dev, sm, ci); | |
| 334 /* | |
| 335 * if called from any routine but probe, we check for | |
| 336 * MDM_S_ISOPEN flag. Since probe does a pseduo open, | |
| 337 * it sets MDM_S_PROBEOPEN flag and we test for this | |
| 338 * flag. They are both exclusive tests. | |
| 339 */ | |
| 340 open_comp = (frm_probe) ? | |
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341 (shared->ms_flags & MDM_S_PROBEOPEN): |
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342 (shared->ms_flags & MDM_S_ISOPEN); |
| 0 | 343 if ((shared->ms_flags & MDM_S_IOERR || !open_comp) && |
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344 ((shared->ms_state == CS_OKAY) || |
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345 (shared->ms_state == CS_RESYNC))) { |
| 0 | 346 if (clr_error) { |
| 347 shared->ms_flags &= ~MDM_S_IOERR; | |
| 348 } | |
| 349 *cip = ci; | |
| 350 *smi = i; | |
| 351 return (1); | |
| 352 } | |
| 353 | |
| 354 if (clr_error && (shared->ms_flags & MDM_S_IOERR)) { | |
| 355 shared->ms_flags &= ~MDM_S_IOERR; | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 *cip = 0; | |
| 360 } | |
| 361 return (0); | |
| 362 } | |
| 363 | |
| 364 /*ARGSUSED*/ | |
| 365 static void | |
| 366 mirror_run_queue(void *d) | |
| 367 { | |
| 368 if (!(md_status & MD_GBL_DAEMONS_LIVE)) | |
| 369 md_daemon(1, &md_done_daemon); | |
| 370 } | |
| 371 /* | |
| 372 * check_comp_4_hotspares | |
| 373 * | |
| 374 * This function attempts to allocate a hotspare for this component if the | |
| 375 * component is in error. In a MN set, the function can be called in 2 modes. | |
| 376 * It can be called either when a component error has been detected or when a | |
| 377 * new hotspare has been allocated. In this case, MD_HOTSPARE_XMIT is set | |
| 378 * in flags and the request is sent to all nodes. | |
| 379 * The handler on each of the nodes then calls this function with | |
| 380 * MD_HOTSPARE_XMIT unset and the hotspare allocation is then performed. | |
| 381 * | |
| 382 * For non-MN sets the function simply attempts to allocate a hotspare. | |
| 383 * | |
| 384 * On entry, the following locks are held | |
| 385 * mirror_md_ops.md_link_rw (if flags has MD_HOTSPARE_LINKHELD set) | |
| 386 * md_unit_writerlock | |
| 387 * | |
| 388 * Returns 0 if ok | |
| 389 * 1 if the unit containing the component has been cleared while | |
| 390 * the mdmn_ksend_message() was being executed | |
| 391 */ | |
| 392 extern int | |
| 393 check_comp_4_hotspares( | |
| 394 mm_unit_t *un, | |
| 395 int smi, | |
| 396 int ci, | |
| 397 uint_t flags, | |
| 398 mddb_recid_t hs_id, /* Only used by MN disksets */ | |
| 399 IOLOCK *lockp /* can be NULL */ | |
| 400 ) | |
| 401 { | |
| 402 mm_submirror_t *sm; | |
| 403 mm_submirror_ic_t *smic; | |
| 404 md_m_shared_t *shared; | |
| 405 mddb_recid_t recids[6]; | |
| 406 minor_t mnum; | |
| 407 intptr_t (*hs_dev)(); | |
| 408 void (*hs_done)(); | |
| 409 void *hs_data; | |
| 410 md_error_t mde = mdnullerror; | |
| 411 set_t setno; | |
| 412 md_mn_msg_allochsp_t allochspmsg; | |
| 413 md_mn_kresult_t *kresult; | |
| 414 mm_unit_t *new_un; | |
| 415 int rval; | |
| 416 | |
| 417 mnum = MD_SID(un); | |
| 418 setno = MD_UN2SET(un); | |
| 419 sm = &un->un_sm[smi]; | |
| 420 smic = &un->un_smic[smi]; | |
| 421 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
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422 (sm->sm_dev, sm, ci); |
| 0 | 423 |
| 424 if (shared->ms_state != CS_ERRED) | |
| 425 return (0); | |
| 426 | |
| 427 /* Don't start a new component resync if a resync is already running. */ | |
| 428 if (MD_STATUS(un) & MD_UN_RESYNC_ACTIVE) | |
| 429 return (0); | |
| 430 | |
| 431 if (MD_MNSET_SETNO(setno) && (flags & MD_HOTSPARE_XMIT)) { | |
| 432 uint_t msgflags; | |
| 433 md_mn_msgtype_t msgtype; | |
| 434 | |
| 435 /* Send allocate hotspare message to all nodes */ | |
| 436 | |
| 437 allochspmsg.msg_allochsp_mnum = un->c.un_self_id; | |
| 438 allochspmsg.msg_allochsp_sm = smi; | |
| 439 allochspmsg.msg_allochsp_comp = ci; | |
| 440 allochspmsg.msg_allochsp_hs_id = shared->ms_hs_id; | |
| 441 | |
| 442 /* | |
| 443 * Before calling mdmn_ksend_message(), release locks | |
| 444 * Can never be in the context of an ioctl. | |
| 445 */ | |
| 446 md_unit_writerexit(MDI_UNIT(mnum)); | |
| 447 if (flags & MD_HOTSPARE_LINKHELD) | |
| 448 rw_exit(&mirror_md_ops.md_link_rw.lock); | |
| 449 #ifdef DEBUG | |
| 450 if (mirror_debug_flag) | |
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451 printf("send alloc hotspare, flags=" |
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452 "0x%x %x, %x, %x, %x\n", flags, |
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453 allochspmsg.msg_allochsp_mnum, |
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454 allochspmsg.msg_allochsp_sm, |
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455 allochspmsg.msg_allochsp_comp, |
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456 allochspmsg.msg_allochsp_hs_id); |
| 0 | 457 #endif |
| 458 if (flags & MD_HOTSPARE_WMUPDATE) { | |
| 459 msgtype = MD_MN_MSG_ALLOCATE_HOTSPARE2; | |
| 460 /* | |
| 461 * When coming from an update of watermarks, there | |
| 462 * must already be a message logged that triggered | |
| 463 * this action. So, no need to log this message, too. | |
| 464 */ | |
| 465 msgflags = MD_MSGF_NO_LOG; | |
| 466 } else { | |
| 467 msgtype = MD_MN_MSG_ALLOCATE_HOTSPARE; | |
| 468 msgflags = MD_MSGF_DEFAULT_FLAGS; | |
| 469 } | |
| 470 | |
| 471 kresult = kmem_alloc(sizeof (md_mn_kresult_t), KM_SLEEP); | |
| 472 rval = mdmn_ksend_message(setno, msgtype, msgflags, | |
| 473 (char *)&allochspmsg, sizeof (allochspmsg), | |
| 474 kresult); | |
| 475 | |
| 476 if (!MDMN_KSEND_MSG_OK(rval, kresult)) { | |
| 477 #ifdef DEBUG | |
| 478 if (mirror_debug_flag) | |
| 479 mdmn_ksend_show_error(rval, kresult, | |
| 480 "ALLOCATE HOTSPARE"); | |
| 481 #endif | |
| 482 /* | |
| 483 * If message is sent ok but exitval indicates an error | |
| 484 * it must be because the mirror has been cleared. In | |
| 485 * this case re-obtain lock and return an error | |
| 486 */ | |
| 487 if ((rval == 0) && (kresult->kmmr_exitval != 0)) { | |
| 488 if (flags & MD_HOTSPARE_LINKHELD) { | |
| 489 rw_enter(&mirror_md_ops.md_link_rw.lock, | |
| 490 RW_READER); | |
| 491 } | |
| 492 kmem_free(kresult, sizeof (md_mn_kresult_t)); | |
| 493 return (1); | |
| 494 } | |
| 495 cmn_err(CE_PANIC, | |
| 496 "ksend_message failure: ALLOCATE_HOTSPARE"); | |
| 497 } | |
| 498 kmem_free(kresult, sizeof (md_mn_kresult_t)); | |
| 499 | |
| 500 /* | |
| 501 * re-obtain the locks | |
| 502 */ | |
| 503 if (flags & MD_HOTSPARE_LINKHELD) | |
| 504 rw_enter(&mirror_md_ops.md_link_rw.lock, RW_READER); | |
| 505 new_un = md_unit_writerlock(MDI_UNIT(mnum)); | |
| 506 | |
| 507 /* | |
| 508 * As we had to release the locks in order to send the | |
| 509 * message to all nodes, we need to check to see if the | |
| 510 * unit has changed. If it has we release the writerlock | |
| 511 * and return fail. | |
| 512 */ | |
| 513 if ((new_un != un) || (un->c.un_type != MD_METAMIRROR)) { | |
| 514 md_unit_writerexit(MDI_UNIT(mnum)); | |
| 515 return (1); | |
| 516 } | |
| 517 } else { | |
| 518 if (MD_MNSET_SETNO(setno)) { | |
| 519 /* | |
| 520 * If 2 or more nodes simultaneously see a | |
| 521 * component failure, these nodes will each | |
| 522 * send an ALLOCATE_HOTSPARE[2] message. | |
| 523 * The first message will allocate the hotspare | |
| 524 * and the subsequent messages should do nothing. | |
| 525 * | |
| 526 * If a slave node doesn't have a hotspare allocated | |
| 527 * at the time the message is initiated, then the | |
| 528 * passed in hs_id will be 0. If the node | |
| 529 * executing this routine has a component shared | |
| 530 * ms_hs_id of non-zero, but the message shows a | |
| 531 * hs_id of 0, then just return since a hotspare | |
| 532 * has already been allocated for this failing | |
| 533 * component. When the slave node returns from | |
| 534 * the ksend_message the hotspare will have | |
| 535 * already been allocated. | |
| 536 * | |
| 537 * If the slave node does send an hs_id of non-zero, | |
| 538 * and the slave node's hs_id matches this node's | |
| 539 * ms_hs_id, then the hotspare has error'd and | |
| 540 * should be replaced. | |
| 541 * | |
| 542 * If the slave node sends an hs_id of non-zero and | |
| 543 * this node has a different shared ms_hs_id, then | |
| 544 * just return since this hotspare has already | |
| 545 * been hotspared. | |
| 546 */ | |
| 547 if (shared->ms_hs_id != 0) { | |
| 548 if (hs_id == 0) { | |
| 549 #ifdef DEBUG | |
| 550 if (mirror_debug_flag) { | |
| 551 printf("check_comp_4_hotspares" | |
| 552 "(NOXMIT), short circuit " | |
| 553 "hs_id=0x%x, " | |
| 554 "ms_hs_id=0x%x\n", | |
| 555 hs_id, shared->ms_hs_id); | |
| 556 } | |
| 557 #endif | |
| 558 return (0); | |
| 559 } | |
| 560 if (hs_id != shared->ms_hs_id) { | |
| 561 #ifdef DEBUG | |
| 562 if (mirror_debug_flag) { | |
| 563 printf("check_comp_4_hotspares" | |
| 564 "(NOXMIT), short circuit2 " | |
| 565 "hs_id=0x%x, " | |
| 566 "ms_hs_id=0x%x\n", | |
| 567 hs_id, shared->ms_hs_id); | |
| 568 } | |
| 569 #endif | |
| 570 return (0); | |
| 571 } | |
| 572 } | |
| 573 } | |
| 574 | |
| 575 sm = &un->un_sm[smi]; | |
| 576 hs_dev = md_get_named_service(sm->sm_dev, 0, | |
| 577 "hotspare device", 0); | |
| 578 if ((*hs_dev)(sm->sm_dev, 0, ci, recids, 6, &hs_done, | |
| 579 &hs_data) != 0) | |
| 580 return (0); | |
| 581 | |
| 582 /* | |
| 583 * set_sm_comp_state() commits the modified records. | |
| 584 * As we don't transmit the changes, no need to drop the lock. | |
| 585 */ | |
| 586 set_sm_comp_state(un, smi, ci, CS_RESYNC, recids, | |
| 587 MD_STATE_NO_XMIT, (IOLOCK *)NULL); | |
| 588 | |
| 589 (*hs_done)(sm->sm_dev, hs_data); | |
| 590 | |
| 591 mirror_check_failfast(mnum); | |
| 592 | |
| 593 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_HOTSPARED, SVM_TAG_METADEVICE, | |
| 594 setno, MD_SID(un)); | |
| 595 | |
| 596 /* | |
| 597 * For a multi-node set we need to reset the un_rs_type, | |
| 598 * un_rs_resync_done and un_rs_resync_2_do fields as the | |
| 599 * hot-spare resync must copy all applicable data. | |
| 600 */ | |
| 601 if (MD_MNSET_SETNO(setno)) { | |
| 602 un->un_rs_type = MD_RS_NONE; | |
| 603 un->un_rs_resync_done = 0; | |
| 604 un->un_rs_resync_2_do = 0; | |
| 605 } | |
| 606 | |
| 607 /* | |
| 608 * Must drop writer lock since mirror_resync_unit will | |
| 609 * open devices and must be able to grab readerlock. | |
| 610 * Don't need to drop IOLOCK since any descendent routines | |
| 611 * calling ksend_messages will drop the IOLOCK as needed. | |
| 612 * | |
| 613 */ | |
| 614 if (lockp) { | |
| 615 md_ioctl_writerexit(lockp); | |
| 616 } else { | |
| 617 md_unit_writerexit(MDI_UNIT(mnum)); | |
| 618 } | |
| 619 | |
| 620 /* start resync */ | |
| 621 (void) mirror_resync_unit(mnum, NULL, &mde, lockp); | |
| 622 | |
| 623 if (lockp) { | |
| 624 new_un = md_ioctl_writerlock(lockp, MDI_UNIT(mnum)); | |
| 625 } else { | |
| 626 new_un = md_unit_writerlock(MDI_UNIT(mnum)); | |
| 627 } | |
| 628 } | |
| 629 return (0); | |
| 630 } | |
| 631 | |
| 632 /* | |
| 633 * check_unit_4_hotspares | |
| 634 * | |
| 635 * For a given mirror, allocate hotspares, if available for any components | |
| 636 * that are in error | |
| 637 * | |
| 638 * Returns 0 if ok | |
| 639 * 1 if check_comp_4_hotspares returns non-zero. This will only | |
| 640 * happen for a MN unit where the unit has been cleared while | |
| 641 * the allocate hotspare message is sent to all nodes. | |
| 642 */ | |
| 643 static int | |
| 644 check_unit_4_hotspares(mm_unit_t *un, int flags) | |
| 645 { | |
| 646 mm_submirror_t *sm; | |
| 647 mm_submirror_ic_t *smic; | |
| 648 int ci; | |
| 649 int i; | |
| 650 int compcnt; | |
| 651 | |
| 652 if (MD_STATUS(un) & MD_UN_RESYNC_ACTIVE) | |
| 653 return (0); | |
| 654 | |
| 655 for (i = 0; i < NMIRROR; i++) { | |
| 656 sm = &un->un_sm[i]; | |
| 657 smic = &un->un_smic[i]; | |
| 658 if (!SMS_IS(sm, SMS_INUSE)) | |
| 659 continue; | |
| 660 compcnt = (*(smic->sm_get_component_count)) (sm->sm_dev, sm); | |
| 661 for (ci = 0; ci < compcnt; ci++) { | |
| 662 md_m_shared_t *shared; | |
| 663 | |
| 664 shared = (md_m_shared_t *) | |
|
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665 (*(smic->sm_shared_by_indx))(sm->sm_dev, sm, ci); |
| 0 | 666 /* |
| 667 * Never called from ioctl context, so pass in | |
| 668 * (IOLOCK *)NULL. Pass through flags from calling | |
| 669 * routine, also setting XMIT flag. | |
| 670 */ | |
| 671 if (check_comp_4_hotspares(un, i, ci, | |
|
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672 (MD_HOTSPARE_XMIT | flags), |
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673 shared->ms_hs_id, (IOLOCK *)NULL) != 0) |
| 0 | 674 return (1); |
| 675 } | |
| 676 } | |
| 677 return (0); | |
| 678 } | |
| 679 | |
| 680 static void | |
| 681 check_4_hotspares(daemon_request_t *drq) | |
| 682 { | |
| 683 mdi_unit_t *ui; | |
| 684 mm_unit_t *un; | |
| 685 md_link_t *next; | |
| 686 int x; | |
| 687 | |
| 688 mutex_enter(&drq->dr_mx); /* clear up front so can poke */ | |
| 689 drq->dr_pending = 0; /* again in low level routine if */ | |
| 690 mutex_exit(&drq->dr_mx); /* something found to do */ | |
| 691 | |
| 692 /* | |
| 693 * Used to have a problem here. The disksets weren't marked as being | |
| 694 * MNHOLD. This opened a window where we could be searching for | |
| 695 * hotspares and have the disk set unloaded (released) from under | |
| 696 * us causing a panic in stripe_component_count(). | |
| 697 * The way to prevent that is to mark the set MNHOLD which prevents | |
| 698 * any diskset from being released while we are scanning the mirrors, | |
| 699 * submirrors and components. | |
| 700 */ | |
| 701 | |
| 702 for (x = 0; x < md_nsets; x++) | |
| 703 md_holdset_enter(x); | |
| 704 | |
| 705 rw_enter(&mirror_md_ops.md_link_rw.lock, RW_READER); | |
| 706 for (next = mirror_md_ops.md_head; next != NULL; next = next->ln_next) { | |
| 707 ui = MDI_UNIT(next->ln_id); | |
| 708 | |
| 709 un = (mm_unit_t *)md_unit_readerlock(ui); | |
| 710 | |
| 711 /* | |
| 712 * Only check the unit if we are the master for this set | |
| 713 * For an MN set, poke_hotspares() is only effective on the | |
| 714 * master | |
| 715 */ | |
| 716 if (MD_MNSET_SETNO(MD_UN2SET(un)) && | |
| 717 md_set[MD_UN2SET(un)].s_am_i_master == 0) { | |
| 718 md_unit_readerexit(ui); | |
| 719 continue; | |
| 720 } | |
| 721 if (MD_STATUS(un) & MD_UN_RESYNC_ACTIVE) { | |
| 722 md_unit_readerexit(ui); | |
| 723 continue; | |
| 724 } | |
| 725 md_unit_readerexit(ui); | |
| 726 | |
| 727 un = (mm_unit_t *)md_unit_writerlock(ui); | |
| 728 /* | |
| 729 * check_unit_4_hotspares will exit 1 if the unit has been | |
| 730 * removed during the process of allocating the hotspare. | |
| 731 * This can only happen for a MN metadevice. If unit no longer | |
| 732 * exists, no need to release writerlock | |
| 733 */ | |
| 734 if (check_unit_4_hotspares(un, MD_HOTSPARE_LINKHELD) == 0) | |
| 735 md_unit_writerexit(ui); | |
| 736 else { | |
| 737 /* | |
| 738 * If check_unit_4_hotspares failed, queue another | |
| 739 * request and break out of this one | |
| 740 */ | |
| 741 (void) poke_hotspares(); | |
| 742 break; | |
| 743 } | |
| 744 } | |
| 745 rw_exit(&mirror_md_ops.md_link_rw.lock); | |
| 746 | |
| 747 for (x = 0; x < md_nsets; x++) | |
| 748 md_holdset_exit(x); | |
| 749 } | |
| 750 | |
| 751 /* | |
| 752 * poke_hotspares | |
| 753 * | |
| 754 * If there is not a pending poke_hotspares request pending, queue a requent | |
| 755 * to call check_4_hotspares(). This will scan all mirrors and attempt to | |
| 756 * allocate hotspares for all components in error. | |
| 757 */ | |
| 758 int | |
| 759 poke_hotspares() | |
| 760 { | |
| 761 mutex_enter(&hotspare_request.dr_mx); | |
| 762 if (hotspare_request.dr_pending == 0) { | |
| 763 hotspare_request.dr_pending = 1; | |
| 764 daemon_request(&md_mhs_daemon, | |
|
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765 check_4_hotspares, (daemon_queue_t *)&hotspare_request, |
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766 REQ_OLD); |
| 0 | 767 } |
| 768 mutex_exit(&hotspare_request.dr_mx); | |
| 769 return (0); | |
| 770 } | |
| 771 | |
| 772 static void | |
| 773 free_all_ecomps(err_comp_t *ecomp) | |
| 774 { | |
| 775 err_comp_t *d; | |
| 776 | |
| 777 while (ecomp != NULL) { | |
| 778 d = ecomp; | |
| 779 ecomp = ecomp->ec_next; | |
| 780 kmem_free(d, sizeof (err_comp_t)); | |
| 781 } | |
| 782 } | |
| 783 | |
| 784 /* | |
| 785 * NAME: mirror_openfail_console_info | |
| 786 * | |
| 787 * DESCRIPTION: Prints a informative message to the console when mirror | |
| 788 * cannot be opened. | |
| 789 * | |
| 790 * PARAMETERS: mm_unit_t un - pointer to mirror unit structure | |
| 791 * int smi - submirror index | |
| 792 * int ci - component index | |
| 793 */ | |
| 794 | |
| 795 void | |
| 796 mirror_openfail_console_info(mm_unit_t *un, int smi, int ci) | |
| 797 { | |
| 798 void (*get_dev)(); | |
| 799 ms_cd_info_t cd; | |
| 800 md_dev64_t tmpdev; | |
| 801 | |
| 802 tmpdev = un->un_sm[smi].sm_dev; | |
| 803 get_dev = (void (*)())md_get_named_service(tmpdev, 0, "get device", 0); | |
| 804 if (get_dev != NULL) { | |
| 805 (void) (*get_dev)(tmpdev, smi, ci, &cd); | |
| 806 cmn_err(CE_WARN, "md %s: open error on %s", | |
|
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807 md_shortname(MD_SID(un)), md_devname(MD_UN2SET(un), |
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808 cd.cd_dev, NULL, 0)); |
| 0 | 809 } else { |
| 810 cmn_err(CE_WARN, "md %s: open error", | |
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811 md_shortname(MD_SID(un))); |
| 0 | 812 } |
| 813 } | |
| 814 | |
| 815 static int | |
| 816 mirror_close_all_devs(mm_unit_t *un, int md_cflags) | |
| 817 { | |
| 818 int i; | |
| 819 md_dev64_t dev; | |
| 820 | |
| 821 for (i = 0; i < NMIRROR; i++) { | |
| 822 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) | |
| 823 continue; | |
| 824 dev = un->un_sm[i].sm_dev; | |
| 825 md_layered_close(dev, md_cflags); | |
| 826 } | |
| 827 return (0); | |
| 828 } | |
| 829 | |
| 830 /* | |
| 831 * Keep track of drivers that don't support failfast. We use this so that | |
| 832 * we only log one diagnostic message for each of these drivers, no matter | |
| 833 * how many times we run the mirror_check_failfast function. | |
| 834 * Return 1 if this is a new driver that does not support failfast, | |
| 835 * return 0 if we have already seen this non-failfast driver. | |
| 836 */ | |
| 837 static int | |
| 838 new_non_ff_driver(const char *s) | |
| 839 { | |
| 840 mutex_enter(&non_ff_drv_mutex); | |
| 841 if (non_ff_drivers == NULL) { | |
|
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842 non_ff_drivers = (char **)kmem_alloc(2 * sizeof (char *), |
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843 KM_NOSLEEP); |
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844 if (non_ff_drivers == NULL) { |
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845 mutex_exit(&non_ff_drv_mutex); |
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846 return (1); |
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847 } |
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848 |
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849 non_ff_drivers[0] = (char *)kmem_alloc(strlen(s) + 1, |
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850 KM_NOSLEEP); |
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851 if (non_ff_drivers[0] == NULL) { |
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852 kmem_free(non_ff_drivers, 2 * sizeof (char *)); |
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853 non_ff_drivers = NULL; |
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854 mutex_exit(&non_ff_drv_mutex); |
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855 return (1); |
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856 } |
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857 |
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858 (void) strcpy(non_ff_drivers[0], s); |
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859 non_ff_drivers[1] = NULL; |
| 0 | 860 |
| 861 } else { | |
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862 int i; |
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863 char **tnames; |
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864 char **tmp; |
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865 |
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866 for (i = 0; non_ff_drivers[i] != NULL; i++) { |
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867 if (strcmp(s, non_ff_drivers[i]) == 0) { |
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868 mutex_exit(&non_ff_drv_mutex); |
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869 return (0); |
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870 } |
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871 } |
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872 |
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873 /* allow for new element and null */ |
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874 i += 2; |
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875 tnames = (char **)kmem_alloc(i * sizeof (char *), KM_NOSLEEP); |
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876 if (tnames == NULL) { |
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877 mutex_exit(&non_ff_drv_mutex); |
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|
878 return (1); |
| 0 | 879 } |
|
6901
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|
880 |
|
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881 for (i = 0; non_ff_drivers[i] != NULL; i++) |
|
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882 tnames[i] = non_ff_drivers[i]; |
|
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|
883 |
|
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884 tnames[i] = (char *)kmem_alloc(strlen(s) + 1, KM_NOSLEEP); |
|
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885 if (tnames[i] == NULL) { |
|
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|
886 /* adjust i so that it is the right count to free */ |
|
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887 kmem_free(tnames, (i + 2) * sizeof (char *)); |
|
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888 mutex_exit(&non_ff_drv_mutex); |
|
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|
889 return (1); |
|
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|
890 } |
|
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|
891 |
|
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|
892 (void) strcpy(tnames[i++], s); |
|
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893 tnames[i] = NULL; |
|
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|
894 |
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|
895 tmp = non_ff_drivers; |
|
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|
896 non_ff_drivers = tnames; |
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|
897 /* i now represents the count we previously alloced */ |
|
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898 kmem_free(tmp, i * sizeof (char *)); |
| 0 | 899 } |
| 900 mutex_exit(&non_ff_drv_mutex); | |
| 901 | |
| 902 return (1); | |
| 903 } | |
| 904 | |
| 905 /* | |
| 906 * Check for the "ddi-failfast-supported" devtree property on each submirror | |
| 907 * component to indicate if we should do I/O to that submirror with the | |
| 908 * B_FAILFAST flag set or not. This check is made at various state transitions | |
| 909 * in the mirror code (e.g. open, enable, hotspare, etc.). Sometimes we | |
| 910 * only need to check one drive (e.g. hotspare) but since the check is | |
| 911 * fast and infrequent and sometimes needs to be done on all components we | |
| 912 * just check all components on each call. | |
| 913 */ | |
| 914 void | |
| 915 mirror_check_failfast(minor_t mnum) | |
| 916 { | |
| 917 int i; | |
| 918 mm_unit_t *un; | |
| 919 | |
| 920 if (md_ff_disable) | |
|
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921 return; |
| 0 | 922 |
| 923 un = MD_UNIT(mnum); | |
| 924 | |
| 925 for (i = 0; i < NMIRROR; i++) { | |
|
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926 int ci; |
|
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|
927 int cnt; |
|
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928 int ff = 1; |
|
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|
929 mm_submirror_t *sm; |
|
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|
930 mm_submirror_ic_t *smic; |
|
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|
931 void (*get_dev)(); |
|
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|
932 |
|
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933 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) |
|
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|
934 continue; |
|
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|
935 |
|
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|
936 sm = &un->un_sm[i]; |
|
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937 smic = &un->un_smic[i]; |
|
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|
938 |
|
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939 get_dev = (void (*)())md_get_named_service(sm->sm_dev, 0, |
|
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940 "get device", 0); |
|
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|
941 |
|
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942 cnt = (*(smic->sm_get_component_count))(sm->sm_dev, sm); |
|
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|
943 for (ci = 0; ci < cnt; ci++) { |
|
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|
944 int found = 0; |
|
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|
945 dev_t ci_dev; |
|
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|
946 major_t major; |
|
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|
947 dev_info_t *devi; |
|
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|
948 ms_cd_info_t cd; |
|
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|
949 |
|
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|
950 /* |
|
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|
951 * this already returns the hs |
|
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|
952 * dev if the device is spared |
|
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|
953 */ |
|
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|
954 (void) (*get_dev)(sm->sm_dev, sm, ci, &cd); |
|
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|
955 |
|
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|
956 ci_dev = md_dev64_to_dev(cd.cd_dev); |
|
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|
957 major = getmajor(ci_dev); |
|
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|
958 |
|
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|
959 if (major == md_major) { |
|
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|
960 /* |
|
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|
961 * this component must be a soft |
|
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|
962 * partition; get the real dev |
|
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|
963 */ |
|
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|
964 minor_t dev_mnum; |
|
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|
965 mdi_unit_t *ui; |
|
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|
966 mp_unit_t *un; |
|
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|
967 set_t setno; |
|
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|
968 side_t side; |
|
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|
969 md_dev64_t tmpdev; |
|
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|
970 |
|
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|
971 ui = MDI_UNIT(getminor(ci_dev)); |
|
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|
972 |
|
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|
973 /* grab necessary lock */ |
|
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|
974 un = (mp_unit_t *)md_unit_readerlock(ui); |
|
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|
975 |
|
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|
976 dev_mnum = MD_SID(un); |
|
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|
977 setno = MD_MIN2SET(dev_mnum); |
|
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|
978 side = mddb_getsidenum(setno); |
|
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|
979 |
|
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changeset
|
980 tmpdev = un->un_dev; |
|
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|
981 |
|
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diff
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|
982 /* Get dev by device id */ |
|
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|
983 if (md_devid_found(setno, side, |
|
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|
984 un->un_key) == 1) { |
|
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|
985 tmpdev = md_resolve_bydevid(dev_mnum, |
|
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changeset
|
986 tmpdev, un->un_key); |
|
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changeset
|
987 } |
|
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changeset
|
988 |
|
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changeset
|
989 md_unit_readerexit(ui); |
|
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changeset
|
990 |
|
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|
991 ci_dev = md_dev64_to_dev(tmpdev); |
|
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|
992 major = getmajor(ci_dev); |
|
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|
993 } |
|
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changeset
|
994 |
|
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|
995 if (ci_dev != NODEV32 && |
|
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|
996 (devi = e_ddi_hold_devi_by_dev(ci_dev, 0)) |
|
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|
997 != NULL) { |
|
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|
998 ddi_prop_op_t prop_op = PROP_LEN_AND_VAL_BUF; |
|
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|
999 int propvalue = 0; |
|
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|
1000 int proplength = sizeof (int); |
|
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|
1001 int error; |
|
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|
1002 struct cb_ops *cb; |
|
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|
1003 |
|
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|
1004 if ((cb = devopsp[major]->devo_cb_ops) != |
|
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|
1005 NULL) { |
|
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|
1006 error = (*cb->cb_prop_op) |
|
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|
1007 (DDI_DEV_T_ANY, devi, prop_op, |
|
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|
1008 DDI_PROP_NOTPROM|DDI_PROP_DONTPASS, |
|
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|
1009 "ddi-failfast-supported", |
|
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|
1010 (caddr_t)&propvalue, &proplength); |
|
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|
1011 |
|
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|
1012 if (error == DDI_PROP_SUCCESS) |
|
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|
1013 found = 1; |
|
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|
1014 } |
|
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|
1015 |
|
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|
1016 if (!found && new_non_ff_driver( |
|
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|
1017 ddi_driver_name(devi))) { |
|
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|
1018 cmn_err(CE_NOTE, "!md: B_FAILFAST I/O" |
|
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|
1019 "disabled on %s", |
|
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|
1020 ddi_driver_name(devi)); |
|
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changeset
|
1021 } |
|
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changeset
|
1022 |
|
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|
1023 ddi_release_devi(devi); |
|
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|
1024 } |
|
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changeset
|
1025 |
|
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|
1026 /* |
|
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|
1027 * All components must support |
|
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|
1028 * failfast in the submirror. |
|
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|
1029 */ |
|
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|
1030 if (!found) { |
|
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|
1031 ff = 0; |
|
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1032 break; |
|
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1033 } |
| 0 | 1034 } |
| 1035 | |
|
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1036 if (ff) { |
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1037 sm->sm_flags |= MD_SM_FAILFAST; |
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1038 } else { |
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1039 sm->sm_flags &= ~MD_SM_FAILFAST; |
| 0 | 1040 } |
| 1041 } | |
| 1042 } | |
| 1043 | |
| 1044 /* | |
| 1045 * Return true if the submirror is unavailable. | |
| 1046 * If any of the submirror components are opened then the submirror cannot | |
| 1047 * be unavailable (MD_INACCESSIBLE). | |
| 1048 * If any of the components are already in the errored state, then the submirror | |
| 1049 * cannot be unavailable (MD_INACCESSIBLE). | |
| 1050 */ | |
| 1051 static bool_t | |
| 1052 submirror_unavailable(mm_unit_t *un, int smi, int from_probe) | |
| 1053 { | |
| 1054 mm_submirror_t *sm; | |
| 1055 mm_submirror_ic_t *smic; | |
| 1056 md_m_shared_t *shared; | |
| 1057 int ci; | |
| 1058 int compcnt; | |
| 1059 | |
| 1060 sm = &un->un_sm[smi]; | |
| 1061 smic = &un->un_smic[smi]; | |
| 1062 | |
| 1063 compcnt = (*(smic->sm_get_component_count)) (sm->sm_dev, un); | |
| 1064 for (ci = 0; ci < compcnt; ci++) { | |
| 1065 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
| 1066 (sm->sm_dev, sm, ci); | |
| 1067 if (from_probe) { | |
| 1068 if (shared->ms_flags & MDM_S_PROBEOPEN) | |
| 1069 return (B_FALSE); | |
| 1070 } else { | |
| 1071 if (shared->ms_flags & MDM_S_ISOPEN) | |
| 1072 return (B_FALSE); | |
| 1073 } | |
| 1074 if (shared->ms_state == CS_ERRED || | |
| 1075 shared->ms_state == CS_LAST_ERRED) | |
| 1076 return (B_FALSE); | |
| 1077 } | |
| 1078 | |
| 1079 return (B_TRUE); | |
| 1080 } | |
| 1081 | |
| 1082 static int | |
| 1083 mirror_open_all_devs(minor_t mnum, int md_oflags, IOLOCK *lockp) | |
| 1084 { | |
| 1085 int i; | |
| 1086 mm_unit_t *un; | |
| 1087 mdi_unit_t *ui; | |
| 1088 int err; | |
| 1089 int smi; | |
| 1090 int ci; | |
| 1091 err_comp_t *c; | |
| 1092 err_comp_t *ecomps = NULL; | |
| 1093 int smmask = 0; | |
| 1094 set_t setno; | |
| 1095 int sm_cnt; | |
| 1096 int sm_unavail_cnt; | |
| 1097 | |
| 1098 mirror_check_failfast(mnum); | |
| 1099 | |
| 1100 un = MD_UNIT(mnum); | |
| 1101 ui = MDI_UNIT(mnum); | |
| 1102 setno = MD_UN2SET(un); | |
| 1103 | |
| 1104 for (i = 0; i < NMIRROR; i++) { | |
| 1105 md_dev64_t tmpdev = un->un_sm[i].sm_dev; | |
| 1106 | |
| 1107 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) | |
| 1108 continue; | |
| 1109 if (md_layered_open(mnum, &tmpdev, md_oflags)) | |
| 1110 smmask |= SMI2BIT(i); | |
| 1111 un->un_sm[i].sm_dev = tmpdev; | |
| 1112 } | |
| 1113 | |
| 1114 /* | |
| 1115 * If smmask is clear, all submirrors are accessible. Clear the | |
| 1116 * MD_INACCESSIBLE bit in this case. This bit is also cleared for the | |
| 1117 * mirror device. If smmask is set, we have to determine which of the | |
| 1118 * submirrors are in error. If no submirror is accessible we mark the | |
| 1119 * whole mirror as MD_INACCESSIBLE. | |
| 1120 */ | |
| 1121 if (smmask == 0) { | |
| 1122 if (lockp) { | |
| 1123 md_ioctl_readerexit(lockp); | |
| 1124 (void) md_ioctl_writerlock(lockp, ui); | |
| 1125 } else { | |
| 1126 md_unit_readerexit(ui); | |
| 1127 (void) md_unit_writerlock(ui); | |
| 1128 } | |
| 1129 ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 1130 if (lockp) { | |
| 1131 md_ioctl_writerexit(lockp); | |
| 1132 (void) md_ioctl_readerlock(lockp, ui); | |
| 1133 } else { | |
| 1134 md_unit_writerexit(ui); | |
| 1135 (void) md_unit_readerlock(ui); | |
| 1136 } | |
| 1137 | |
| 1138 for (i = 0; i < NMIRROR; i++) { | |
| 1139 md_dev64_t tmpdev; | |
| 1140 mdi_unit_t *sm_ui; | |
| 1141 | |
| 1142 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) | |
| 1143 continue; | |
| 1144 | |
| 1145 tmpdev = un->un_sm[i].sm_dev; | |
| 1146 sm_ui = MDI_UNIT(getminor(md_dev64_to_dev(tmpdev))); | |
| 1147 (void) md_unit_writerlock(sm_ui); | |
| 1148 sm_ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 1149 md_unit_writerexit(sm_ui); | |
| 1150 } | |
| 1151 | |
| 1152 return (0); | |
| 1153 } | |
| 1154 | |
| 1155 for (i = 0; i < NMIRROR; i++) { | |
| 1156 md_dev64_t tmpdev; | |
| 1157 | |
| 1158 if (!(smmask & SMI2BIT(i))) | |
| 1159 continue; | |
| 1160 | |
| 1161 tmpdev = un->un_sm[i].sm_dev; | |
| 1162 err = md_layered_open(mnum, &tmpdev, MD_OFLG_CONT_ERRS); | |
| 1163 un->un_sm[i].sm_dev = tmpdev; | |
| 1164 ASSERT(err == 0); | |
| 1165 } | |
| 1166 | |
| 1167 if (lockp) { | |
| 1168 md_ioctl_readerexit(lockp); | |
| 1169 un = (mm_unit_t *)md_ioctl_writerlock(lockp, ui); | |
| 1170 } else { | |
| 1171 md_unit_readerexit(ui); | |
| 1172 un = (mm_unit_t *)md_unit_writerlock(ui); | |
| 1173 } | |
| 1174 | |
| 1175 /* | |
| 1176 * We want to make sure the unavailable flag is not masking a real | |
| 1177 * error on the submirror. | |
| 1178 * For each submirror, | |
| 1179 * if all of the submirror components couldn't be opened and there | |
| 1180 * are no errors on the submirror, then set the unavailable flag | |
| 1181 * otherwise, clear unavailable. | |
| 1182 */ | |
| 1183 sm_cnt = 0; | |
| 1184 sm_unavail_cnt = 0; | |
| 1185 for (i = 0; i < NMIRROR; i++) { | |
| 1186 md_dev64_t tmpdev; | |
| 1187 mdi_unit_t *sm_ui; | |
| 1188 | |
| 1189 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) | |
| 1190 continue; | |
| 1191 | |
| 1192 sm_cnt++; | |
| 1193 tmpdev = un->un_sm[i].sm_dev; | |
| 1194 sm_ui = MDI_UNIT(getminor(md_dev64_to_dev(tmpdev))); | |
| 1195 | |
| 1196 (void) md_unit_writerlock(sm_ui); | |
| 1197 if (submirror_unavailable(un, i, 0)) { | |
| 1198 sm_ui->ui_tstate |= MD_INACCESSIBLE; | |
| 1199 sm_unavail_cnt++; | |
| 1200 } else { | |
| 1201 sm_ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 1202 } | |
| 1203 md_unit_writerexit(sm_ui); | |
| 1204 } | |
| 1205 | |
| 1206 /* | |
| 1207 * If all of the submirrors are unavailable, the mirror is also | |
| 1208 * unavailable. | |
| 1209 */ | |
| 1210 if (sm_cnt == sm_unavail_cnt) { | |
| 1211 ui->ui_tstate |= MD_INACCESSIBLE; | |
| 1212 } else { | |
| 1213 ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 1214 } | |
| 1215 | |
| 1216 smi = 0; | |
| 1217 ci = 0; | |
| 1218 while (mirror_geterror(un, &smi, &ci, 1, 0) != 0) { | |
| 1219 if (mirror_other_sources(un, smi, ci, 1) == 1) { | |
| 1220 | |
| 1221 free_all_ecomps(ecomps); | |
| 1222 (void) mirror_close_all_devs(un, md_oflags); | |
| 1223 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_OPEN_FAIL, | |
| 1224 SVM_TAG_METADEVICE, setno, MD_SID(un)); | |
| 1225 mirror_openfail_console_info(un, smi, ci); | |
| 1226 if (lockp) { | |
| 1227 md_ioctl_writerexit(lockp); | |
| 1228 (void) md_ioctl_readerlock(lockp, ui); | |
| 1229 } else { | |
| 1230 md_unit_writerexit(ui); | |
| 1231 (void) md_unit_readerlock(ui); | |
| 1232 } | |
| 1233 return (ENXIO); | |
| 1234 } | |
| 1235 | |
| 1236 /* track all component states that need changing */ | |
| 1237 c = (err_comp_t *)kmem_alloc(sizeof (err_comp_t), KM_SLEEP); | |
| 1238 c->ec_next = ecomps; | |
| 1239 c->ec_smi = smi; | |
| 1240 c->ec_ci = ci; | |
| 1241 ecomps = c; | |
| 1242 ci++; | |
| 1243 } | |
| 1244 | |
| 1245 /* Make all state changes and commit them */ | |
| 1246 for (c = ecomps; c != NULL; c = c->ec_next) { | |
| 1247 /* | |
| 1248 * If lockp is set, then entering kernel through ioctl. | |
| 1249 * For a MN set, the only ioctl path is via a commd message | |
| 1250 * (ALLOCATE_HOTSPARE or *RESYNC* messages) that is already | |
| 1251 * being sent to each node. | |
| 1252 * In this case, set NO_XMIT so that set_sm_comp_state | |
| 1253 * won't attempt to send a message on a message. | |
| 1254 * | |
| 1255 * In !MN sets, the xmit flag is ignored, so it doesn't matter | |
| 1256 * which flag is passed. | |
| 1257 */ | |
| 1258 if (lockp) { | |
| 1259 set_sm_comp_state(un, c->ec_smi, c->ec_ci, CS_ERRED, 0, | |
| 1260 MD_STATE_NO_XMIT, lockp); | |
| 1261 } else { | |
| 1262 set_sm_comp_state(un, c->ec_smi, c->ec_ci, CS_ERRED, 0, | |
| 1263 (MD_STATE_XMIT | MD_STATE_OCHELD), lockp); | |
| 1264 } | |
| 1265 /* | |
| 1266 * For a MN set, the NOTIFY is done when the state change is | |
| 1267 * processed on each node | |
| 1268 */ | |
| 1269 if (!MD_MNSET_SETNO(setno)) { | |
| 1270 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_ERRED, | |
| 1271 SVM_TAG_METADEVICE, setno, MD_SID(un)); | |
| 1272 } | |
| 1273 } | |
| 1274 | |
| 1275 if (lockp) { | |
| 1276 md_ioctl_writerexit(lockp); | |
| 1277 (void) md_ioctl_readerlock(lockp, ui); | |
| 1278 } else { | |
| 1279 md_unit_writerexit(ui); | |
| 1280 (void) md_unit_readerlock(ui); | |
| 1281 } | |
| 1282 | |
| 1283 free_all_ecomps(ecomps); | |
| 1284 | |
| 1285 /* allocate hotspares for all errored components */ | |
| 1286 if (MD_MNSET_SETNO(setno)) { | |
| 1287 /* | |
| 1288 * If we're called from an ioctl (lockp set) then we cannot | |
| 1289 * directly call send_poke_hotspares as this will block until | |
| 1290 * the message gets despatched to all nodes. If the cluster is | |
| 1291 * going through a reconfig cycle then the message will block | |
| 1292 * until the cycle is complete, and as we originate from a | |
| 1293 * service call from commd we will livelock. | |
| 1294 */ | |
| 1295 if (lockp == NULL) { | |
| 1296 md_unit_readerexit(ui); | |
| 1297 send_poke_hotspares(setno); | |
| 1298 (void) md_unit_readerlock(ui); | |
| 1299 } | |
| 1300 } else { | |
| 1301 (void) poke_hotspares(); | |
| 1302 } | |
| 1303 return (0); | |
| 1304 } | |
| 1305 | |
| 1306 void | |
|
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1307 mirror_overlap_tree_remove(md_mps_t *ps) |
| 0 | 1308 { |
| 1309 mm_unit_t *un; | |
| 1310 | |
| 1311 if (panicstr) | |
| 1312 return; | |
| 1313 | |
|
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1314 VERIFY(ps->ps_flags & MD_MPS_ON_OVERLAP); |
| 0 | 1315 un = ps->ps_un; |
| 1316 | |
|
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1317 mutex_enter(&un->un_overlap_tree_mx); |
|
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1318 avl_remove(&un->un_overlap_root, ps); |
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1319 ps->ps_flags &= ~MD_MPS_ON_OVERLAP; |
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1320 if (un->un_overlap_tree_flag != 0) { |
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1321 un->un_overlap_tree_flag = 0; |
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1322 cv_broadcast(&un->un_overlap_tree_cv); |
| 0 | 1323 } |
|
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1324 mutex_exit(&un->un_overlap_tree_mx); |
| 0 | 1325 } |
| 1326 | |
| 1327 | |
| 1328 /* | |
| 1329 * wait_for_overlaps: | |
| 1330 * ----------------- | |
| 1331 * Check that given i/o request does not cause an overlap with already pending | |
| 1332 * i/o. If it does, block until the overlapped i/o completes. | |
| 1333 * | |
| 1334 * The flag argument has MD_OVERLAP_ALLOW_REPEAT set if it is ok for the parent | |
|
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1335 * structure to be already in the overlap tree and MD_OVERLAP_NO_REPEAT if |
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1336 * it must not already be in the tree. |
| 0 | 1337 */ |
| 1338 static void | |
| 1339 wait_for_overlaps(md_mps_t *ps, int flags) | |
| 1340 { | |
| 1341 mm_unit_t *un; | |
|
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1342 avl_index_t where; |
|
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1343 md_mps_t *ps1; |
| 0 | 1344 |
| 1345 if (panicstr) | |
| 1346 return; | |
| 1347 | |
| 1348 un = ps->ps_un; | |
|
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1349 mutex_enter(&un->un_overlap_tree_mx); |
| 0 | 1350 if ((flags & MD_OVERLAP_ALLOW_REPEAT) && |
| 1351 (ps->ps_flags & MD_MPS_ON_OVERLAP)) { | |
|
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1352 mutex_exit(&un->un_overlap_tree_mx); |
| 0 | 1353 return; |
| 1354 } | |
|
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1355 |
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1356 VERIFY(!(ps->ps_flags & MD_MPS_ON_OVERLAP)); |
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1357 |
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1358 do { |
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1359 ps1 = avl_find(&un->un_overlap_root, ps, &where); |
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1360 if (ps1 == NULL) { |
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1361 /* |
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1362 * The candidate range does not overlap with any |
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1363 * range in the tree. Insert it and be done. |
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1364 */ |
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1365 avl_insert(&un->un_overlap_root, ps, where); |
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1366 ps->ps_flags |= MD_MPS_ON_OVERLAP; |
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1367 } else { |
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1368 /* |
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1369 * The candidate range would overlap. Set the flag |
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1370 * indicating we need to be woken up, and sleep |
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1371 * until another thread removes a range. If upon |
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1372 * waking up we find this mps was put on the tree |
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1373 * by another thread, the loop terminates. |
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1374 */ |
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1375 un->un_overlap_tree_flag = 1; |
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1376 cv_wait(&un->un_overlap_tree_cv, |
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1377 &un->un_overlap_tree_mx); |
| 0 | 1378 } |
|
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1379 } while (!(ps->ps_flags & MD_MPS_ON_OVERLAP)); |
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1380 mutex_exit(&un->un_overlap_tree_mx); |
| 0 | 1381 } |
| 1382 | |
| 1383 /* | |
| 1384 * This function is called from mirror_done to check whether any pages have | |
| 1385 * been modified while a mirrored write was in progress. Returns 0 if | |
| 1386 * all pages associated with bp are clean, 1 otherwise. | |
| 1387 */ | |
| 1388 static int | |
| 1389 any_pages_dirty(struct buf *bp) | |
| 1390 { | |
| 1391 int rval; | |
| 1392 | |
| 1393 rval = biomodified(bp); | |
| 1394 if (rval == -1) | |
| 1395 rval = 0; | |
| 1396 | |
| 1397 return (rval); | |
| 1398 } | |
| 1399 | |
| 1400 #define MAX_EXTRAS 10 | |
| 1401 | |
| 1402 void | |
| 1403 mirror_commit( | |
| 1404 mm_unit_t *un, | |
| 1405 int smmask, | |
| 1406 mddb_recid_t *extras | |
| 1407 ) | |
| 1408 { | |
| 1409 mm_submirror_t *sm; | |
| 1410 md_unit_t *su; | |
| 1411 int i; | |
| 1412 | |
| 1413 /* 2=mirror,null id */ | |
| 1414 mddb_recid_t recids[NMIRROR+2+MAX_EXTRAS]; | |
| 1415 | |
| 1416 int ri = 0; | |
| 1417 | |
| 1418 if (md_get_setstatus(MD_UN2SET(un)) & MD_SET_STALE) | |
| 1419 return; | |
| 1420 | |
| 1421 /* Add two, this includes the mirror unit and the null recid */ | |
| 1422 if (extras != NULL) { | |
| 1423 int nrecids = 0; | |
| 1424 while (extras[nrecids] != 0) { | |
| 1425 nrecids++; | |
| 1426 } | |
| 1427 ASSERT(nrecids <= MAX_EXTRAS); | |
| 1428 } | |
| 1429 | |
| 1430 if (un != NULL) | |
| 1431 recids[ri++] = un->c.un_record_id; | |
| 1432 for (i = 0; i < NMIRROR; i++) { | |
| 1433 if (!(smmask & SMI2BIT(i))) | |
| 1434 continue; | |
| 1435 sm = &un->un_sm[i]; | |
| 1436 if (!SMS_IS(sm, SMS_INUSE)) | |
| 1437 continue; | |
| 1438 if (md_getmajor(sm->sm_dev) != md_major) | |
| 1439 continue; | |
| 1440 su = MD_UNIT(md_getminor(sm->sm_dev)); | |
| 1441 recids[ri++] = su->c.un_record_id; | |
| 1442 } | |
| 1443 | |
| 1444 if (extras != NULL) | |
| 1445 while (*extras != 0) { | |
| 1446 recids[ri++] = *extras; | |
| 1447 extras++; | |
| 1448 } | |
| 1449 | |
| 1450 if (ri == 0) | |
| 1451 return; | |
| 1452 recids[ri] = 0; | |
| 1453 | |
| 1454 /* | |
| 1455 * Ok to hold ioctl lock across record commit to mddb as | |
| 1456 * long as the record(s) being committed aren't resync records. | |
| 1457 */ | |
| 1458 mddb_commitrecs_wrapper(recids); | |
| 1459 } | |
| 1460 | |
| 1461 | |
| 1462 /* | |
| 1463 * This routine is used to set a bit in the writable_bm bitmap | |
| 1464 * which represents each submirror in a metamirror which | |
| 1465 * is writable. The first writable submirror index is assigned | |
| 1466 * to the sm_index. The number of writable submirrors are returned in nunits. | |
| 1467 * | |
| 1468 * This routine returns the submirror's unit number. | |
| 1469 */ | |
| 1470 | |
| 1471 static void | |
| 1472 select_write_units(struct mm_unit *un, md_mps_t *ps) | |
| 1473 { | |
| 1474 | |
| 1475 int i; | |
| 1476 unsigned writable_bm = 0; | |
| 1477 unsigned nunits = 0; | |
| 1478 | |
| 1479 for (i = 0; i < NMIRROR; i++) { | |
| 1480 if (SUBMIRROR_IS_WRITEABLE(un, i)) { | |
| 1481 /* set bit of all writable units */ | |
| 1482 writable_bm |= SMI2BIT(i); | |
| 1483 nunits++; | |
| 1484 } | |
| 1485 } | |
| 1486 ps->ps_writable_sm = writable_bm; | |
| 1487 ps->ps_active_cnt = nunits; | |
| 1488 ps->ps_current_sm = 0; | |
| 1489 } | |
| 1490 | |
| 1491 static | |
| 1492 unsigned | |
| 1493 select_write_after_read_units(struct mm_unit *un, md_mps_t *ps) | |
| 1494 { | |
| 1495 | |
| 1496 int i; | |
| 1497 unsigned writable_bm = 0; | |
| 1498 unsigned nunits = 0; | |
| 1499 | |
| 1500 for (i = 0; i < NMIRROR; i++) { | |
| 1501 if (SUBMIRROR_IS_WRITEABLE(un, i) && | |
| 1502 un->un_sm[i].sm_flags & MD_SM_RESYNC_TARGET) { | |
| 1503 writable_bm |= SMI2BIT(i); | |
| 1504 nunits++; | |
| 1505 } | |
| 1506 } | |
| 1507 if ((writable_bm & ps->ps_allfrom_sm) != 0) { | |
| 1508 writable_bm &= ~ps->ps_allfrom_sm; | |
| 1509 nunits--; | |
| 1510 } | |
| 1511 ps->ps_writable_sm = writable_bm; | |
| 1512 ps->ps_active_cnt = nunits; | |
| 1513 ps->ps_current_sm = 0; | |
| 1514 return (nunits); | |
| 1515 } | |
| 1516 | |
| 1517 static md_dev64_t | |
| 1518 select_read_unit( | |
| 1519 mm_unit_t *un, | |
| 1520 diskaddr_t blkno, | |
| 1521 u_longlong_t reqcount, | |
| 1522 u_longlong_t *cando, | |
| 1523 int must_be_opened, | |
| 1524 md_m_shared_t **shared, | |
| 1525 md_mcs_t *cs) | |
| 1526 { | |
| 1527 int i; | |
| 1528 md_m_shared_t *s; | |
| 1529 uint_t lasterrcnt = 0; | |
| 1530 md_dev64_t dev = 0; | |
| 1531 u_longlong_t cnt; | |
| 1532 u_longlong_t mincnt; | |
| 1533 mm_submirror_t *sm; | |
| 1534 mm_submirror_ic_t *smic; | |
| 1535 mdi_unit_t *ui; | |
| 1536 | |
| 1537 mincnt = reqcount; | |
| 1538 for (i = 0; i < NMIRROR; i++) { | |
| 1539 if (!SUBMIRROR_IS_READABLE(un, i)) | |
| 1540 continue; | |
| 1541 sm = &un->un_sm[i]; | |
| 1542 smic = &un->un_smic[i]; | |
| 1543 cnt = reqcount; | |
| 1544 | |
| 1545 /* | |
| 1546 * If the current submirror is marked as inaccessible, do not | |
| 1547 * try to access it. | |
| 1548 */ | |
| 1549 ui = MDI_UNIT(getminor(expldev(sm->sm_dev))); | |
| 1550 (void) md_unit_readerlock(ui); | |
| 1551 if (ui->ui_tstate & MD_INACCESSIBLE) { | |
| 1552 md_unit_readerexit(ui); | |
| 1553 continue; | |
| 1554 } | |
| 1555 md_unit_readerexit(ui); | |
| 1556 | |
| 1557 s = (md_m_shared_t *)(*(smic->sm_shared_by_blk)) | |
| 1558 (sm->sm_dev, sm, blkno, &cnt); | |
| 1559 | |
| 1560 if (must_be_opened && !(s->ms_flags & MDM_S_ISOPEN)) | |
| 1561 continue; | |
| 1562 if (s->ms_state == CS_OKAY) { | |
| 1563 *cando = cnt; | |
| 1564 if (shared != NULL) | |
| 1565 *shared = s; | |
| 1566 | |
| 1567 if (un->un_sm[i].sm_flags & MD_SM_FAILFAST && | |
| 1568 cs != NULL) { | |
| 1569 cs->cs_buf.b_flags |= B_FAILFAST; | |
| 1570 } | |
| 1571 | |
| 1572 return (un->un_sm[i].sm_dev); | |
| 1573 } | |
| 1574 if (s->ms_state != CS_LAST_ERRED) | |
| 1575 continue; | |
| 1576 | |
| 1577 /* don't use B_FAILFAST since we're Last Erred */ | |
| 1578 | |
| 1579 if (mincnt > cnt) | |
| 1580 mincnt = cnt; | |
| 1581 if (s->ms_lasterrcnt > lasterrcnt) { | |
| 1582 lasterrcnt = s->ms_lasterrcnt; | |
| 1583 if (shared != NULL) | |
| 1584 *shared = s; | |
| 1585 dev = un->un_sm[i].sm_dev; | |
| 1586 } | |
| 1587 } | |
| 1588 *cando = mincnt; | |
| 1589 return (dev); | |
| 1590 } | |
| 1591 | |
| 1592 /* | |
| 1593 * Given a 32-bit bitmap, this routine will return the bit number | |
| 1594 * of the nth bit set. The nth bit set is passed via the index integer. | |
| 1595 * | |
| 1596 * This routine is used to run through the writable submirror bitmap | |
| 1597 * and starting all of the writes. See the value returned is the | |
| 1598 * index to appropriate submirror structure, in the md_sm | |
| 1599 * array for metamirrors. | |
| 1600 */ | |
| 1601 static int | |
| 1602 md_find_nth_unit(uint_t mask, int index) | |
| 1603 { | |
| 1604 int bit, nfound; | |
| 1605 | |
| 1606 for (bit = -1, nfound = -1; nfound != index; bit++) { | |
| 1607 ASSERT(mask != 0); | |
| 1608 nfound += (mask & 1); | |
| 1609 mask >>= 1; | |
| 1610 } | |
| 1611 return (bit); | |
| 1612 } | |
| 1613 | |
| 1614 static int | |
| 1615 fast_select_read_unit(md_mps_t *ps, md_mcs_t *cs) | |
| 1616 { | |
| 1617 mm_unit_t *un; | |
| 1618 buf_t *bp; | |
| 1619 int i; | |
| 1620 unsigned nunits = 0; | |
| 1621 int iunit; | |
| 1622 uint_t running_bm = 0; | |
| 1623 uint_t sm_index; | |
| 1624 | |
| 1625 bp = &cs->cs_buf; | |
| 1626 un = ps->ps_un; | |
| 1627 | |
| 1628 for (i = 0; i < NMIRROR; i++) { | |
| 1629 if (!SMS_BY_INDEX_IS(un, i, SMS_RUNNING)) | |
| 1630 continue; | |
| 1631 running_bm |= SMI2BIT(i); | |
| 1632 nunits++; | |
| 1633 } | |
| 1634 if (nunits == 0) | |
| 1635 return (1); | |
| 1636 | |
| 1637 /* | |
| 1638 * For directed mirror read (DMR) we only use the specified side and | |
| 1639 * do not compute the source of the read. | |
| 1640 */ | |
| 1641 if (ps->ps_flags & MD_MPS_DMR) { | |
| 1642 sm_index = un->un_dmr_last_read; | |
| 1643 } else { | |
| 1644 /* Normal (non-DMR) operation */ | |
| 1645 switch (un->un_read_option) { | |
| 1646 case RD_GEOMETRY: | |
| 1647 iunit = (int)(bp->b_lblkno / | |
| 1648 howmany(un->c.un_total_blocks, nunits)); | |
| 1649 sm_index = md_find_nth_unit(running_bm, iunit); | |
| 1650 break; | |
| 1651 case RD_FIRST: | |
| 1652 sm_index = md_find_nth_unit(running_bm, 0); | |
| 1653 break; | |
| 1654 case RD_LOAD_BAL: | |
| 1655 /* this is intentional to fall into the default */ | |
| 1656 default: | |
| 1657 un->un_last_read = (un->un_last_read + 1) % nunits; | |
| 1658 sm_index = md_find_nth_unit(running_bm, | |
| 1659 un->un_last_read); | |
| 1660 break; | |
| 1661 } | |
| 1662 } | |
| 1663 bp->b_edev = md_dev64_to_dev(un->un_sm[sm_index].sm_dev); | |
| 1664 ps->ps_allfrom_sm = SMI2BIT(sm_index); | |
| 1665 | |
| 1666 if (un->un_sm[sm_index].sm_flags & MD_SM_FAILFAST) { | |
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1667 bp->b_flags |= B_FAILFAST; |
| 0 | 1668 } |
| 1669 | |
| 1670 return (0); | |
| 1671 } | |
| 1672 | |
| 1673 static | |
| 1674 int | |
| 1675 mirror_are_submirrors_available(mm_unit_t *un) | |
| 1676 { | |
| 1677 int i; | |
| 1678 for (i = 0; i < NMIRROR; i++) { | |
| 1679 md_dev64_t tmpdev = un->un_sm[i].sm_dev; | |
| 1680 | |
| 1681 if ((!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) || | |
| 1682 md_getmajor(tmpdev) != md_major) | |
| 1683 continue; | |
| 1684 | |
| 1685 if ((MD_MIN2SET(md_getminor(tmpdev)) >= md_nsets) || | |
| 1686 (MD_MIN2UNIT(md_getminor(tmpdev)) >= md_nunits)) | |
| 1687 return (0); | |
| 1688 | |
| 1689 if (MDI_UNIT(md_getminor(tmpdev)) == NULL) | |
| 1690 return (0); | |
| 1691 } | |
| 1692 return (1); | |
| 1693 } | |
| 1694 | |
| 1695 void | |
| 1696 build_submirror(mm_unit_t *un, int i, int snarfing) | |
| 1697 { | |
| 1698 struct mm_submirror *sm; | |
| 1699 struct mm_submirror_ic *smic; | |
| 1700 md_unit_t *su; | |
| 1701 set_t setno; | |
| 1702 | |
| 1703 sm = &un->un_sm[i]; | |
| 1704 smic = &un->un_smic[i]; | |
| 1705 | |
| 1706 sm->sm_flags = 0; /* sometime we may need to do more here */ | |
| 1707 | |
| 1708 setno = MD_UN2SET(un); | |
| 1709 | |
| 1710 if (!SMS_IS(sm, SMS_INUSE)) | |
| 1711 return; | |
| 1712 if (snarfing) { | |
| 1713 sm->sm_dev = md_getdevnum(setno, mddb_getsidenum(setno), | |
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1714 sm->sm_key, MD_NOTRUST_DEVT); |
| 0 | 1715 } else { |
| 1716 if (md_getmajor(sm->sm_dev) == md_major) { | |
| 1717 su = MD_UNIT(md_getminor(sm->sm_dev)); | |
| 1718 un->c.un_flag |= (su->c.un_flag & MD_LABELED); | |
| 1719 /* submirror can no longer be soft partitioned */ | |
| 1720 MD_CAPAB(su) &= (~MD_CAN_SP); | |
| 1721 } | |
| 1722 } | |
| 1723 smic->sm_shared_by_blk = md_get_named_service(sm->sm_dev, | |
| 1724 0, "shared by blk", 0); | |
| 1725 smic->sm_shared_by_indx = md_get_named_service(sm->sm_dev, | |
| 1726 0, "shared by indx", 0); | |
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1727 smic->sm_get_component_count = (int (*)())md_get_named_service( |
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1728 sm->sm_dev, 0, "get component count", 0); |
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1729 smic->sm_get_bcss = (int (*)())md_get_named_service(sm->sm_dev, 0, |
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1730 "get block count skip size", 0); |
| 0 | 1731 sm->sm_state &= ~SMS_IGNORE; |
| 1732 if (SMS_IS(sm, SMS_OFFLINE)) | |
| 1733 MD_STATUS(un) |= MD_UN_OFFLINE_SM; | |
| 1734 md_set_parent(sm->sm_dev, MD_SID(un)); | |
| 1735 } | |
| 1736 | |
| 1737 static void | |
| 1738 mirror_cleanup(mm_unit_t *un) | |
| 1739 { | |
| 1740 mddb_recid_t recid; | |
| 1741 int smi; | |
| 1742 sv_dev_t sv[NMIRROR]; | |
| 1743 int nsv = 0; | |
| 1744 | |
| 1745 /* | |
| 1746 * If a MN diskset and this node is not the master, do | |
| 1747 * not delete any records on snarf of the mirror records. | |
| 1748 */ | |
| 1749 if (MD_MNSET_SETNO(MD_UN2SET(un)) && | |
| 1750 md_set[MD_UN2SET(un)].s_am_i_master == 0) { | |
| 1751 return; | |
| 1752 } | |
| 1753 | |
| 1754 for (smi = 0; smi < NMIRROR; smi++) { | |
| 1755 if (!SMS_BY_INDEX_IS(un, smi, SMS_INUSE)) | |
| 1756 continue; | |
| 1757 sv[nsv].setno = MD_UN2SET(un); | |
| 1758 sv[nsv++].key = un->un_sm[smi].sm_key; | |
| 1759 } | |
| 1760 | |
| 1761 recid = un->un_rr_dirty_recid; | |
| 1762 mddb_deleterec_wrapper(un->c.un_record_id); | |
| 1763 if (recid > 0) | |
| 1764 mddb_deleterec_wrapper(recid); | |
| 1765 | |
| 1766 md_rem_names(sv, nsv); | |
| 1767 } | |
| 1768 | |
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1769 /* |
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1770 * Comparison function for the avl tree which tracks |
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1771 * outstanding writes on submirrors. |
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1772 * |
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1773 * Returns: |
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1774 * -1: ps1 < ps2 |
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1775 * 0: ps1 and ps2 overlap |
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1776 * 1: ps1 > ps2 |
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1777 */ |
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1778 static int |
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1779 mirror_overlap_compare(const void *p1, const void *p2) |
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1780 { |
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1781 const md_mps_t *ps1 = (md_mps_t *)p1; |
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1782 const md_mps_t *ps2 = (md_mps_t *)p2; |
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1783 |
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1784 if (ps1->ps_firstblk < ps2->ps_firstblk) { |
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1785 if (ps1->ps_lastblk >= ps2->ps_firstblk) |
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1786 return (0); |
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1787 return (-1); |
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1788 } |
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1789 |
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1790 if (ps1->ps_firstblk > ps2->ps_firstblk) { |
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1791 if (ps1->ps_firstblk <= ps2->ps_lastblk) |
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1792 return (0); |
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1793 return (1); |
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1794 } |
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1795 |
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1796 return (0); |
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1797 } |
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1798 |
| 0 | 1799 /* Return a -1 if optimized record unavailable and set should be released */ |
| 1800 int | |
| 1801 mirror_build_incore(mm_unit_t *un, int snarfing) | |
| 1802 { | |
| 1803 int i; | |
| 1804 | |
| 1805 if (MD_STATUS(un) & MD_UN_BEING_RESET) { | |
| 1806 mddb_setrecprivate(un->c.un_record_id, MD_PRV_PENDCLEAN); | |
| 1807 return (1); | |
| 1808 } | |
| 1809 | |
| 1810 if (mirror_are_submirrors_available(un) == 0) | |
| 1811 return (1); | |
| 1812 | |
| 1813 if (MD_UNIT(MD_SID(un)) != NULL) | |
| 1814 return (0); | |
| 1815 | |
| 1816 MD_STATUS(un) = 0; | |
| 1817 | |
| 1818 /* pre-4.1 didn't define CAN_META_CHILD capability */ | |
| 1819 MD_CAPAB(un) = MD_CAN_META_CHILD | MD_CAN_PARENT | MD_CAN_SP; | |
| 1820 | |
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1821 un->un_overlap_tree_flag = 0; |
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1822 avl_create(&un->un_overlap_root, mirror_overlap_compare, |
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1823 sizeof (md_mps_t), offsetof(md_mps_t, ps_overlap_node)); |
| 0 | 1824 |
| 1825 for (i = 0; i < NMIRROR; i++) | |
| 1826 build_submirror(un, i, snarfing); | |
| 1827 | |
| 1828 if (unit_setup_resync(un, snarfing) != 0) { | |
| 1829 if (snarfing) { | |
| 1830 mddb_setrecprivate(un->c.un_record_id, MD_PRV_GOTIT); | |
| 1831 /* | |
| 1832 * If a MN set and set is not stale, then return -1 | |
| 1833 * which will force the caller to unload the set. | |
| 1834 * The MN diskset nodes will return failure if | |
| 1835 * unit_setup_resync fails so that nodes won't | |
| 1836 * get out of sync. | |
| 1837 * | |
| 1838 * If set is STALE, the master node can't allocate | |
| 1839 * a resync record (if needed), but node needs to | |
| 1840 * join the set so that user can delete broken mddbs. | |
| 1841 * So, if set is STALE, just continue on. | |
| 1842 */ | |
| 1843 if (MD_MNSET_SETNO(MD_UN2SET(un)) && | |
| 1844 !(md_get_setstatus(MD_UN2SET(un)) & MD_SET_STALE)) { | |
| 1845 return (-1); | |
| 1846 } | |
| 1847 } else | |
| 1848 return (1); | |
| 1849 } | |
| 1850 | |
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1851 mutex_init(&un->un_overlap_tree_mx, NULL, MUTEX_DEFAULT, NULL); |
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1852 cv_init(&un->un_overlap_tree_cv, NULL, CV_DEFAULT, NULL); |
| 0 | 1853 |
| 1854 un->un_suspend_wr_flag = 0; | |
| 1855 mutex_init(&un->un_suspend_wr_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 1856 cv_init(&un->un_suspend_wr_cv, NULL, CV_DEFAULT, NULL); | |
| 1857 | |
| 1858 /* | |
| 1859 * Allocate mutexes for mirror-owner and resync-owner changes. | |
| 1860 * All references to the owner message state field must be guarded | |
| 1861 * by this mutex. | |
| 1862 */ | |
| 1863 mutex_init(&un->un_owner_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 1864 | |
| 1865 /* | |
| 1866 * Allocate mutex and condvar for resync thread manipulation. These | |
| 1867 * will be used by mirror_resync_unit/mirror_ioctl_resync | |
| 1868 */ | |
| 1869 mutex_init(&un->un_rs_thread_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 1870 cv_init(&un->un_rs_thread_cv, NULL, CV_DEFAULT, NULL); | |
| 1871 | |
| 1872 /* | |
| 1873 * Allocate mutex and condvar for resync progress thread manipulation. | |
| 1874 * This allows resyncs to be continued across an intervening reboot. | |
| 1875 */ | |
| 1876 mutex_init(&un->un_rs_progress_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 1877 cv_init(&un->un_rs_progress_cv, NULL, CV_DEFAULT, NULL); | |
| 1878 | |
| 1879 /* | |
| 1880 * Allocate mutex and condvar for Directed Mirror Reads (DMR). This | |
| 1881 * provides synchronization between a user-ioctl and the resulting | |
| 1882 * strategy() call that performs the read(). | |
| 1883 */ | |
| 1884 mutex_init(&un->un_dmr_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 1885 cv_init(&un->un_dmr_cv, NULL, CV_DEFAULT, NULL); | |
| 1886 | |
| 1887 MD_UNIT(MD_SID(un)) = un; | |
| 1888 return (0); | |
| 1889 } | |
| 1890 | |
| 1891 | |
| 1892 void | |
| 1893 reset_mirror(struct mm_unit *un, minor_t mnum, int removing) | |
| 1894 { | |
| 1895 mddb_recid_t recid, vtoc_id; | |
| 1896 size_t bitcnt; | |
| 1897 size_t shortcnt; | |
| 1898 int smi; | |
| 1899 sv_dev_t sv[NMIRROR]; | |
| 1900 int nsv = 0; | |
| 1901 uint_t bits = 0; | |
| 1902 minor_t selfid; | |
| 1903 md_unit_t *su; | |
| 1904 | |
| 1905 md_destroy_unit_incore(mnum, &mirror_md_ops); | |
| 1906 | |
| 1907 shortcnt = un->un_rrd_num * sizeof (short); | |
| 1908 bitcnt = howmany(un->un_rrd_num, NBBY); | |
| 1909 | |
| 1910 if (un->un_outstanding_writes) | |
| 1911 kmem_free((caddr_t)un->un_outstanding_writes, shortcnt); | |
| 1912 if (un->un_goingclean_bm) | |
| 1913 kmem_free((caddr_t)un->un_goingclean_bm, bitcnt); | |
| 1914 if (un->un_goingdirty_bm) | |
| 1915 kmem_free((caddr_t)un->un_goingdirty_bm, bitcnt); | |
| 1916 if (un->un_resync_bm) | |
| 1917 kmem_free((caddr_t)un->un_resync_bm, bitcnt); | |
| 1918 | |
| 1919 MD_UNIT(mnum) = NULL; | |
| 1920 | |
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1921 /* |
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1922 * Attempt release of its minor node |
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1923 */ |
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1924 md_remove_minor_node(mnum); |
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1925 |
| 0 | 1926 if (!removing) |
| 1927 return; | |
| 1928 | |
| 1929 for (smi = 0; smi < NMIRROR; smi++) { | |
| 1930 if (!SMS_BY_INDEX_IS(un, smi, SMS_INUSE)) | |
| 1931 continue; | |
| 1932 /* reallow soft partitioning of submirror and reset parent */ | |
| 1933 su = MD_UNIT(md_getminor(un->un_sm[smi].sm_dev)); | |
| 1934 MD_CAPAB(su) |= MD_CAN_SP; | |
| 1935 md_reset_parent(un->un_sm[smi].sm_dev); | |
| 1936 reset_comp_states(&un->un_sm[smi], &un->un_smic[smi]); | |
| 1937 | |
| 1938 sv[nsv].setno = MD_MIN2SET(mnum); | |
| 1939 sv[nsv++].key = un->un_sm[smi].sm_key; | |
| 1940 bits |= SMI2BIT(smi); | |
| 1941 } | |
| 1942 | |
| 1943 MD_STATUS(un) |= MD_UN_BEING_RESET; | |
| 1944 recid = un->un_rr_dirty_recid; | |
| 1945 vtoc_id = un->c.un_vtoc_id; | |
| 1946 selfid = MD_SID(un); | |
| 1947 | |
| 1948 mirror_commit(un, bits, 0); | |
| 1949 | |
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1950 avl_destroy(&un->un_overlap_root); |
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1951 |
| 0 | 1952 /* Destroy all mutexes and condvars before returning. */ |
| 1953 mutex_destroy(&un->un_suspend_wr_mx); | |
| 1954 cv_destroy(&un->un_suspend_wr_cv); | |
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1955 mutex_destroy(&un->un_overlap_tree_mx); |
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1956 cv_destroy(&un->un_overlap_tree_cv); |
| 0 | 1957 mutex_destroy(&un->un_owner_mx); |
| 1958 mutex_destroy(&un->un_rs_thread_mx); | |
| 1959 cv_destroy(&un->un_rs_thread_cv); | |
| 1960 mutex_destroy(&un->un_rs_progress_mx); | |
| 1961 cv_destroy(&un->un_rs_progress_cv); | |
| 1962 mutex_destroy(&un->un_dmr_mx); | |
| 1963 cv_destroy(&un->un_dmr_cv); | |
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1964 |
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1965 /* |
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1966 * Remove self from the namespace |
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1967 */ |
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1968 if (un->c.un_revision & MD_FN_META_DEV) { |
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1969 (void) md_rem_selfname(un->c.un_self_id); |
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1970 } |
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1971 |
| 0 | 1972 mddb_deleterec_wrapper(un->c.un_record_id); |
| 1973 if (recid != 0) | |
| 1974 mddb_deleterec_wrapper(recid); | |
| 1975 | |
| 1976 /* Remove the vtoc, if present */ | |
| 1977 if (vtoc_id) | |
| 1978 mddb_deleterec_wrapper(vtoc_id); | |
| 1979 | |
| 1980 md_rem_names(sv, nsv); | |
| 1981 | |
| 1982 SE_NOTIFY(EC_SVM_CONFIG, ESC_SVM_DELETE, SVM_TAG_METADEVICE, | |
| 1983 MD_MIN2SET(selfid), selfid); | |
| 1984 } | |
| 1985 | |
| 1986 int | |
| 1987 mirror_internal_open( | |
| 1988 minor_t mnum, | |
| 1989 int flag, | |
| 1990 int otyp, | |
| 1991 int md_oflags, | |
| 1992 IOLOCK *lockp /* can be NULL */ | |
| 1993 ) | |
| 1994 { | |
| 1995 mdi_unit_t *ui = MDI_UNIT(mnum); | |
| 1996 int err = 0; | |
| 1997 | |
| 1998 tryagain: | |
| 1999 /* single thread */ | |
| 2000 if (lockp) { | |
| 2001 /* | |
| 2002 * If ioctl lock is held, use openclose_enter | |
| 2003 * routine that will set the ioctl flag when | |
| 2004 * grabbing the readerlock. | |
| 2005 */ | |
| 2006 (void) md_ioctl_openclose_enter(lockp, ui); | |
| 2007 } else { | |
| 2008 (void) md_unit_openclose_enter(ui); | |
| 2009 } | |
| 2010 | |
| 2011 /* | |
| 2012 * The mirror_open_all_devs routine may end up sending a STATE_UPDATE | |
| 2013 * message in a MN diskset and this requires that the openclose | |
| 2014 * lock is dropped in order to send this message. So, another | |
| 2015 * flag (MD_UL_OPENINPROGRESS) is used to keep another thread from | |
| 2016 * attempting an open while this thread has an open in progress. | |
| 2017 * Call the *_lh version of the lock exit routines since the ui_mx | |
| 2018 * mutex must be held from checking for OPENINPROGRESS until | |
| 2019 * after the cv_wait call. | |
| 2020 */ | |
| 2021 mutex_enter(&ui->ui_mx); | |
| 2022 if (ui->ui_lock & MD_UL_OPENINPROGRESS) { | |
| 2023 if (lockp) { | |
| 2024 (void) md_ioctl_openclose_exit_lh(lockp); | |
| 2025 } else { | |
| 2026 md_unit_openclose_exit_lh(ui); | |
| 2027 } | |
| 2028 cv_wait(&ui->ui_cv, &ui->ui_mx); | |
| 2029 mutex_exit(&ui->ui_mx); | |
| 2030 goto tryagain; | |
| 2031 } | |
| 2032 | |
| 2033 ui->ui_lock |= MD_UL_OPENINPROGRESS; | |
| 2034 mutex_exit(&ui->ui_mx); | |
| 2035 | |
| 2036 /* open devices, if necessary */ | |
| 2037 if (! md_unit_isopen(ui) || (ui->ui_tstate & MD_INACCESSIBLE)) { | |
| 2038 if ((err = mirror_open_all_devs(mnum, md_oflags, lockp)) != 0) | |
| 2039 goto out; | |
| 2040 } | |
| 2041 | |
| 2042 /* count open */ | |
| 2043 if ((err = md_unit_incopen(mnum, flag, otyp)) != 0) | |
| 2044 goto out; | |
| 2045 | |
| 2046 /* unlock, return success */ | |
| 2047 out: | |
| 2048 mutex_enter(&ui->ui_mx); | |
| 2049 ui->ui_lock &= ~MD_UL_OPENINPROGRESS; | |
| 2050 mutex_exit(&ui->ui_mx); | |
| 2051 | |
| 2052 if (lockp) { | |
| 2053 /* | |
| 2054 * If ioctl lock is held, use openclose_exit | |
| 2055 * routine that will clear the lockp reader flag. | |
| 2056 */ | |
| 2057 (void) md_ioctl_openclose_exit(lockp); | |
| 2058 } else { | |
| 2059 md_unit_openclose_exit(ui); | |
| 2060 } | |
| 2061 return (err); | |
| 2062 } | |
| 2063 | |
| 2064 int | |
| 2065 mirror_internal_close( | |
| 2066 minor_t mnum, | |
| 2067 int otyp, | |
| 2068 int md_cflags, | |
| 2069 IOLOCK *lockp /* can be NULL */ | |
| 2070 ) | |
| 2071 { | |
| 2072 mdi_unit_t *ui = MDI_UNIT(mnum); | |
| 2073 mm_unit_t *un; | |
| 2074 int err = 0; | |
| 2075 | |
| 2076 /* single thread */ | |
| 2077 if (lockp) { | |
| 2078 /* | |
| 2079 * If ioctl lock is held, use openclose_enter | |
| 2080 * routine that will set the ioctl flag when | |
| 2081 * grabbing the readerlock. | |
| 2082 */ | |
| 2083 un = (mm_unit_t *)md_ioctl_openclose_enter(lockp, ui); | |
| 2084 } else { | |
| 2085 un = (mm_unit_t *)md_unit_openclose_enter(ui); | |
| 2086 } | |
| 2087 | |
| 2088 /* count closed */ | |
| 2089 if ((err = md_unit_decopen(mnum, otyp)) != 0) | |
| 2090 goto out; | |
| 2091 | |
| 2092 /* close devices, if necessary */ | |
| 2093 if (! md_unit_isopen(ui) || (md_cflags & MD_OFLG_PROBEDEV)) { | |
| 2094 /* | |
| 2095 * Clean up dirty bitmap for this unit. Do this | |
| 2096 * before closing the underlying devices to avoid | |
| 2097 * race conditions with reset_mirror() as a | |
| 2098 * result of a 'metaset -r' command running in | |
| 2099 * parallel. This might cause deallocation of | |
| 2100 * dirty region bitmaps; with underlying metadevices | |
| 2101 * in place this can't happen. | |
| 2102 * Don't do this if a MN set and ABR not set | |
| 2103 */ | |
| 2104 if (new_resync && !(MD_STATUS(un) & MD_UN_KEEP_DIRTY)) { | |
| 2105 if (!MD_MNSET_SETNO(MD_UN2SET(un)) || | |
| 2106 !(ui->ui_tstate & MD_ABR_CAP)) | |
| 2107 mirror_process_unit_resync(un); | |
| 2108 } | |
| 2109 (void) mirror_close_all_devs(un, md_cflags); | |
| 2110 | |
| 2111 /* | |
| 2112 * For a MN set with transient capabilities (eg ABR/DMR) set, | |
| 2113 * clear these capabilities on the last open in the cluster. | |
| 2114 * To do this we send a message to all nodes to see of the | |
| 2115 * device is open. | |
| 2116 */ | |
| 2117 if (MD_MNSET_SETNO(MD_UN2SET(un)) && | |
| 2118 (ui->ui_tstate & (MD_ABR_CAP|MD_DMR_CAP))) { | |
| 2119 if (lockp) { | |
| 2120 (void) md_ioctl_openclose_exit(lockp); | |
| 2121 } else { | |
| 2122 md_unit_openclose_exit(ui); | |
| 2123 } | |
| 2124 | |
| 2125 /* | |
| 2126 * if we are in the context of an ioctl, drop the | |
| 2127 * ioctl lock. | |
| 2128 * Otherwise, no other locks should be held. | |
| 2129 */ | |
| 2130 if (lockp) { | |
| 2131 IOLOCK_RETURN_RELEASE(0, lockp); | |
| 2132 } | |
| 2133 | |
| 2134 mdmn_clear_all_capabilities(mnum); | |
| 2135 | |
| 2136 /* if dropped the lock previously, regain it */ | |
| 2137 if (lockp) { | |
| 2138 IOLOCK_RETURN_REACQUIRE(lockp); | |
| 2139 } | |
| 2140 return (0); | |
| 2141 } | |
| 2142 /* unlock and return success */ | |
| 2143 } | |
| 2144 out: | |
| 2145 /* Call whether lockp is NULL or not. */ | |
| 2146 if (lockp) { | |
| 2147 md_ioctl_openclose_exit(lockp); | |
| 2148 } else { | |
| 2149 md_unit_openclose_exit(ui); | |
| 2150 } | |
| 2151 return (err); | |
| 2152 } | |
| 2153 | |
| 2154 /* | |
| 2155 * When a component has completed resyncing and is now ok, check if the | |
| 2156 * corresponding component in the other submirrors is in the Last Erred | |
| 2157 * state. If it is, we want to change that to the Erred state so we stop | |
| 2158 * using that component and start using this good component instead. | |
| 2159 * | |
| 2160 * This is called from set_sm_comp_state and recursively calls | |
| 2161 * set_sm_comp_state if it needs to change the Last Erred state. | |
| 2162 */ | |
| 2163 static void | |
| 2164 reset_lasterred(mm_unit_t *un, int smi, mddb_recid_t *extras, uint_t flags, | |
| 2165 IOLOCK *lockp) | |
| 2166 { | |
| 2167 mm_submirror_t *sm; | |
| 2168 mm_submirror_ic_t *smic; | |
| 2169 int ci; | |
| 2170 int i; | |
| 2171 int compcnt; | |
| 2172 int changed = 0; | |
| 2173 | |
| 2174 for (i = 0; i < NMIRROR; i++) { | |
| 2175 sm = &un->un_sm[i]; | |
| 2176 smic = &un->un_smic[i]; | |
| 2177 | |
| 2178 if (!SMS_IS(sm, SMS_INUSE)) | |
| 2179 continue; | |
| 2180 | |
| 2181 /* ignore the submirror that we just made ok */ | |
| 2182 if (i == smi) | |
| 2183 continue; | |
| 2184 | |
| 2185 compcnt = (*(smic->sm_get_component_count)) (sm->sm_dev, un); | |
| 2186 for (ci = 0; ci < compcnt; ci++) { | |
| 2187 md_m_shared_t *shared; | |
| 2188 | |
| 2189 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
| 2190 (sm->sm_dev, sm, ci); | |
| 2191 | |
| 2192 if ((shared->ms_state & CS_LAST_ERRED) && | |
| 2193 !mirror_other_sources(un, i, ci, 1)) { | |
| 2194 | |
| 2195 set_sm_comp_state(un, i, ci, CS_ERRED, extras, | |
| 2196 flags, lockp); | |
| 2197 changed = 1; | |
| 2198 } | |
| 2199 } | |
| 2200 } | |
| 2201 | |
| 2202 /* maybe there is a hotspare for this newly erred component */ | |
| 2203 if (changed) { | |
| 2204 set_t setno; | |
| 2205 | |
| 2206 setno = MD_UN2SET(un); | |
| 2207 if (MD_MNSET_SETNO(setno)) { | |
| 2208 send_poke_hotspares(setno); | |
| 2209 } else { | |
| 2210 (void) poke_hotspares(); | |
| 2211 } | |
| 2212 } | |
| 2213 } | |
| 2214 | |
| 2215 /* | |
| 2216 * set_sm_comp_state | |
| 2217 * | |
| 2218 * Set the state of a submirror component to the specified new state. | |
| 2219 * If the mirror is in a multi-node set, send messages to all nodes to | |
| 2220 * block all writes to the mirror and then update the state and release the | |
| 2221 * writes. These messages are only sent if MD_STATE_XMIT is set in flags. | |
| 2222 * MD_STATE_XMIT will be unset in 2 cases: | |
| 2223 * 1. When the state is changed to CS_RESYNC as this state change | |
| 2224 * will already have been updated on each node by the processing of the | |
| 2225 * distributed metasync command, hence no need to xmit. | |
| 2226 * 2. When the state is change to CS_OKAY after a resync has completed. Again | |
| 2227 * the resync completion will already have been processed on each node by | |
| 2228 * the processing of the MD_MN_MSG_RESYNC_PHASE_DONE message for a component | |
| 2229 * resync, hence no need to xmit. | |
| 2230 * | |
| 2231 * In case we are called from the updates of a watermark, | |
| 2232 * (then MD_STATE_WMUPDATE will be set in the ps->flags) this is due to | |
| 2233 * a metainit or similar. In this case the message that we sent to propagate | |
| 2234 * the state change must not be a class1 message as that would deadlock with | |
| 2235 * the metainit command that is still being processed. | |
| 2236 * This we achieve by creating a class2 message MD_MN_MSG_STATE_UPDATE2 | |
| 2237 * instead. This also makes the submessage generator to create a class2 | |
| 2238 * submessage rather than a class1 (which would also block) | |
| 2239 * | |
| 2240 * On entry, unit_writerlock is held | |
| 2241 * If MD_STATE_OCHELD is set in flags, then unit_openclose lock is | |
| 2242 * also held. | |
| 2243 */ | |
| 2244 void | |
| 2245 set_sm_comp_state( | |
| 2246 mm_unit_t *un, | |
| 2247 int smi, | |
| 2248 int ci, | |
| 2249 int newstate, | |
| 2250 mddb_recid_t *extras, | |
| 2251 uint_t flags, | |
| 2252 IOLOCK *lockp | |
| 2253 ) | |
| 2254 { | |
| 2255 mm_submirror_t *sm; | |
| 2256 mm_submirror_ic_t *smic; | |
| 2257 md_m_shared_t *shared; | |
| 2258 int origstate; | |
| 2259 void (*get_dev)(); | |
| 2260 ms_cd_info_t cd; | |
| 2261 char devname[MD_MAX_CTDLEN]; | |
| 2262 int err; | |
| 2263 set_t setno = MD_UN2SET(un); | |
| 2264 md_mn_msg_stch_t stchmsg; | |
| 2265 mdi_unit_t *ui = MDI_UNIT(MD_SID(un)); | |
| 2266 md_mn_kresult_t *kresult; | |
| 2267 int rval; | |
| 2268 uint_t msgflags; | |
| 2269 md_mn_msgtype_t msgtype; | |
| 2270 int save_lock = 0; | |
| 2271 mdi_unit_t *ui_sm; | |
| 2272 | |
| 2273 sm = &un->un_sm[smi]; | |
| 2274 smic = &un->un_smic[smi]; | |
| 2275 | |
| 2276 /* If we have a real error status then turn off MD_INACCESSIBLE. */ | |
| 2277 ui_sm = MDI_UNIT(getminor(md_dev64_to_dev(sm->sm_dev))); | |
| 2278 if (newstate & (CS_ERRED | CS_RESYNC | CS_LAST_ERRED) && | |
| 2279 ui_sm->ui_tstate & MD_INACCESSIBLE) { | |
|
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2280 ui_sm->ui_tstate &= ~MD_INACCESSIBLE; |
| 0 | 2281 } |
| 2282 | |
|
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2283 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) |
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2284 (sm->sm_dev, sm, ci); |
| 0 | 2285 origstate = shared->ms_state; |
| 2286 | |
| 2287 /* | |
| 2288 * If the new state is an error and the old one wasn't, generate | |
| 2289 * a console message. We do this before we send the state to other | |
| 2290 * nodes in a MN set because the state change may change the component | |
| 2291 * name if a hotspare is allocated. | |
| 2292 */ | |
| 2293 if ((! (origstate & (CS_ERRED|CS_LAST_ERRED))) && | |
| 2294 (newstate & (CS_ERRED|CS_LAST_ERRED))) { | |
| 2295 | |
|
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2296 get_dev = (void (*)())md_get_named_service(sm->sm_dev, 0, |
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2297 "get device", 0); |
| 0 | 2298 (void) (*get_dev)(sm->sm_dev, sm, ci, &cd); |
| 2299 | |
| 2300 err = md_getdevname(setno, mddb_getsidenum(setno), 0, | |
| 2301 cd.cd_dev, devname, sizeof (devname)); | |
| 2302 | |
| 2303 if (err == ENOENT) { | |
| 2304 (void) md_devname(setno, cd.cd_dev, devname, | |
|
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2305 sizeof (devname)); |
| 0 | 2306 } |
| 2307 | |
| 2308 cmn_err(CE_WARN, "md: %s: %s needs maintenance", | |
| 2309 md_shortname(md_getminor(sm->sm_dev)), devname); | |
| 2310 | |
| 2311 if (newstate & CS_LAST_ERRED) { | |
| 2312 cmn_err(CE_WARN, "md: %s: %s last erred", | |
| 2313 md_shortname(md_getminor(sm->sm_dev)), | |
| 2314 devname); | |
| 2315 | |
| 2316 } else if (shared->ms_flags & MDM_S_ISOPEN) { | |
| 2317 /* | |
| 2318 * Close the broken device and clear the open flag on | |
| 2319 * it. Closing the device means the RCM framework will | |
| 2320 * be able to unconfigure the device if required. | |
| 2321 * | |
| 2322 * We have to check that the device is open, otherwise | |
| 2323 * the first open on it has resulted in the error that | |
| 2324 * is being processed and the actual cd.cd_dev will be | |
| 2325 * NODEV64. | |
| 2326 * | |
| 2327 * If this is a multi-node mirror, then the multinode | |
| 2328 * state checks following this code will cause the | |
| 2329 * slave nodes to close the mirror in the function | |
| 2330 * mirror_set_state(). | |
| 2331 */ | |
| 2332 md_layered_close(cd.cd_dev, MD_OFLG_NULL); | |
| 2333 shared->ms_flags &= ~MDM_S_ISOPEN; | |
| 2334 } | |
| 2335 | |
| 2336 } else if ((origstate & CS_LAST_ERRED) && (newstate & CS_ERRED) && | |
| 2337 (shared->ms_flags & MDM_S_ISOPEN)) { | |
| 2338 /* | |
| 2339 * Similar to logic above except no log messages since we | |
| 2340 * are just transitioning from Last Erred to Erred. | |
| 2341 */ | |
| 2342 get_dev = (void (*)())md_get_named_service(sm->sm_dev, 0, | |
| 2343 "get device", 0); | |
| 2344 (void) (*get_dev)(sm->sm_dev, sm, ci, &cd); | |
| 2345 | |
| 2346 md_layered_close(cd.cd_dev, MD_OFLG_NULL); | |
| 2347 shared->ms_flags &= ~MDM_S_ISOPEN; | |
| 2348 } | |
| 2349 | |
| 2350 if ((MD_MNSET_SETNO(setno)) && (origstate != newstate) && | |
| 2351 (flags & MD_STATE_XMIT) && !(ui->ui_tstate & MD_ERR_PENDING)) { | |
| 2352 /* | |
| 2353 * For a multi-node mirror, send the state change to the | |
| 2354 * master, which broadcasts to all nodes, including this | |
| 2355 * one. Once the message is received, the state is set | |
| 2356 * in-core and the master commits the change to disk. | |
| 2357 * There is a case, comp_replace, where this function | |
| 2358 * can be called from within an ioctl and therefore in this | |
| 2359 * case, as the ioctl will already be called on each node, | |
| 2360 * there is no need to xmit the state change to the master for | |
| 2361 * distribution to the other nodes. MD_STATE_XMIT flag is used | |
| 2362 * to indicate whether a xmit is required. The mirror's | |
| 2363 * transient state is set to MD_ERR_PENDING to avoid sending | |
| 2364 * multiple messages. | |
| 2365 */ | |
| 2366 if (newstate & (CS_ERRED|CS_LAST_ERRED)) | |
| 2367 ui->ui_tstate |= MD_ERR_PENDING; | |
| 2368 | |
| 2369 /* | |
| 2370 * Send a state update message to all nodes. This message | |
| 2371 * will generate 2 submessages, the first one to suspend | |
| 2372 * all writes to the mirror and the second to update the | |
| 2373 * state and resume writes. | |
| 2374 */ | |
| 2375 stchmsg.msg_stch_mnum = un->c.un_self_id; | |
| 2376 stchmsg.msg_stch_sm = smi; | |
| 2377 stchmsg.msg_stch_comp = ci; | |
| 2378 stchmsg.msg_stch_new_state = newstate; | |
| 2379 stchmsg.msg_stch_hs_id = shared->ms_hs_id; | |
| 2380 #ifdef DEBUG | |
| 2381 if (mirror_debug_flag) | |
| 2382 printf("send set state, %x, %x, %x, %x, %x\n", | |
| 2383 stchmsg.msg_stch_mnum, stchmsg.msg_stch_sm, | |
| 2384 stchmsg.msg_stch_comp, stchmsg.msg_stch_new_state, | |
| 2385 stchmsg.msg_stch_hs_id); | |
| 2386 #endif | |
| 2387 if (flags & MD_STATE_WMUPDATE) { | |
| 2388 msgtype = MD_MN_MSG_STATE_UPDATE2; | |
| 2389 /* | |
| 2390 * When coming from an update of watermarks, there | |
| 2391 * must already be a message logged that triggered | |
| 2392 * this action. So, no need to log this message, too. | |
| 2393 */ | |
| 2394 msgflags = MD_MSGF_NO_LOG; | |
| 2395 } else { | |
| 2396 msgtype = MD_MN_MSG_STATE_UPDATE; | |
| 2397 msgflags = MD_MSGF_DEFAULT_FLAGS; | |
| 2398 } | |
| 2399 | |
| 2400 /* | |
| 2401 * If we are in the context of an ioctl, drop the ioctl lock. | |
| 2402 * lockp holds the list of locks held. | |
| 2403 * | |
| 2404 * Otherwise, increment the appropriate reacquire counters. | |
| 2405 * If openclose lock is *held, then must reacquire reader | |
| 2406 * lock before releasing the openclose lock. | |
| 2407 * Do not drop the ARRAY_WRITER lock as we may not be able | |
| 2408 * to reacquire it. | |
| 2409 */ | |
| 2410 if (lockp) { | |
| 2411 if (lockp->l_flags & MD_ARRAY_WRITER) { | |
| 2412 save_lock = MD_ARRAY_WRITER; | |
| 2413 lockp->l_flags &= ~MD_ARRAY_WRITER; | |
| 2414 } else if (lockp->l_flags & MD_ARRAY_READER) { | |
| 2415 save_lock = MD_ARRAY_READER; | |
| 2416 lockp->l_flags &= ~MD_ARRAY_READER; | |
| 2417 } | |
| 2418 IOLOCK_RETURN_RELEASE(0, lockp); | |
| 2419 } else { | |
| 2420 if (flags & MD_STATE_OCHELD) { | |
| 2421 md_unit_writerexit(ui); | |
| 2422 (void) md_unit_readerlock(ui); | |
| 2423 md_unit_openclose_exit(ui); | |
| 2424 } else { | |
| 2425 md_unit_writerexit(ui); | |
| 2426 } | |
| 2427 } | |
| 2428 | |
| 2429 kresult = kmem_alloc(sizeof (md_mn_kresult_t), KM_SLEEP); | |
|
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2430 rval = mdmn_ksend_message(setno, msgtype, msgflags, |
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2431 (char *)&stchmsg, sizeof (stchmsg), kresult); |
| 0 | 2432 |
| 2433 if (!MDMN_KSEND_MSG_OK(rval, kresult)) { | |
| 2434 mdmn_ksend_show_error(rval, kresult, "STATE UPDATE"); | |
| 2435 cmn_err(CE_PANIC, | |
| 2436 "ksend_message failure: STATE_UPDATE"); | |
| 2437 } | |
| 2438 kmem_free(kresult, sizeof (md_mn_kresult_t)); | |
| 2439 | |
| 2440 /* if dropped the lock previously, regain it */ | |
| 2441 if (lockp) { | |
| 2442 IOLOCK_RETURN_REACQUIRE(lockp); | |
| 2443 lockp->l_flags |= save_lock; | |
| 2444 } else { | |
| 2445 /* | |
| 2446 * Reacquire dropped locks and update acquirecnts | |
| 2447 * appropriately. | |
| 2448 */ | |
| 2449 if (flags & MD_STATE_OCHELD) { | |
| 2450 /* | |
| 2451 * openclose also grabs readerlock. | |
| 2452 */ | |
| 2453 (void) md_unit_openclose_enter(ui); | |
| 2454 md_unit_readerexit(ui); | |
| 2455 (void) md_unit_writerlock(ui); | |
| 2456 } else { | |
| 2457 (void) md_unit_writerlock(ui); | |
| 2458 } | |
| 2459 } | |
| 2460 | |
| 2461 ui->ui_tstate &= ~MD_ERR_PENDING; | |
| 2462 } else { | |
| 2463 shared->ms_state = newstate; | |
| 2464 uniqtime32(&shared->ms_timestamp); | |
| 2465 | |
| 2466 if (newstate == CS_ERRED) | |
| 2467 shared->ms_flags |= MDM_S_NOWRITE; | |
| 2468 else | |
| 2469 shared->ms_flags &= ~MDM_S_NOWRITE; | |
| 2470 | |
| 2471 shared->ms_flags &= ~MDM_S_IOERR; | |
| 2472 un->un_changecnt++; | |
| 2473 shared->ms_lasterrcnt = un->un_changecnt; | |
| 2474 | |
| 2475 mirror_set_sm_state(sm, smic, SMS_RUNNING, 0); | |
| 2476 mirror_commit(un, SMI2BIT(smi), extras); | |
| 2477 } | |
| 2478 | |
| 2479 if ((origstate & CS_RESYNC) && (newstate & CS_OKAY)) { | |
| 2480 /* | |
| 2481 * Resetting the Last Erred state will recursively call back | |
| 2482 * into this function (set_sm_comp_state) to update the state. | |
| 2483 */ | |
| 2484 reset_lasterred(un, smi, extras, flags, lockp); | |
| 2485 } | |
| 2486 } | |
| 2487 | |
| 2488 static int | |
| 2489 find_another_logical( | |
| 2490 mm_unit_t *un, | |
| 2491 mm_submirror_t *esm, | |
| 2492 diskaddr_t blk, | |
| 2493 u_longlong_t cnt, | |
| 2494 int must_be_open, | |
| 2495 int state, | |
| 2496 int err_cnt) | |
| 2497 { | |
| 2498 u_longlong_t cando; | |
| 2499 md_dev64_t dev; | |
| 2500 md_m_shared_t *s; | |
| 2501 | |
| 2502 esm->sm_state |= SMS_IGNORE; | |
| 2503 while (cnt != 0) { | |
| 2504 u_longlong_t mcnt; | |
| 2505 | |
| 2506 mcnt = MIN(cnt, lbtodb(1024 * 1024 * 1024)); /* 1 Gig Blks */ | |
| 2507 | |
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2508 dev = select_read_unit(un, blk, mcnt, &cando, |
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2509 must_be_open, &s, NULL); |
| 0 | 2510 if (dev == (md_dev64_t)0) |
| 2511 break; | |
| 2512 | |
| 2513 if ((state == CS_LAST_ERRED) && | |
| 2514 (s->ms_state == CS_LAST_ERRED) && | |
| 2515 (err_cnt > s->ms_lasterrcnt)) | |
| 2516 break; | |
| 2517 | |
| 2518 cnt -= cando; | |
| 2519 blk += cando; | |
| 2520 } | |
| 2521 esm->sm_state &= ~SMS_IGNORE; | |
| 2522 return (cnt != 0); | |
| 2523 } | |
| 2524 | |
| 2525 int | |
| 2526 mirror_other_sources(mm_unit_t *un, int smi, int ci, int must_be_open) | |
| 2527 { | |
| 2528 mm_submirror_t *sm; | |
| 2529 mm_submirror_ic_t *smic; | |
| 2530 size_t count; | |
| 2531 diskaddr_t block; | |
| 2532 u_longlong_t skip; | |
| 2533 u_longlong_t size; | |
| 2534 md_dev64_t dev; | |
| 2535 int cnt; | |
| 2536 md_m_shared_t *s; | |
| 2537 int not_found; | |
| 2538 | |
| 2539 sm = &un->un_sm[smi]; | |
| 2540 smic = &un->un_smic[smi]; | |
| 2541 dev = sm->sm_dev; | |
| 2542 | |
| 2543 /* | |
| 2544 * Make sure every component of the submirror | |
| 2545 * has other sources. | |
| 2546 */ | |
| 2547 if (ci < 0) { | |
| 2548 /* Find the highest lasterrcnt */ | |
| 2549 cnt = (*(smic->sm_get_component_count))(dev, sm); | |
| 2550 for (ci = 0; ci < cnt; ci++) { | |
| 2551 not_found = mirror_other_sources(un, smi, ci, | |
| 2552 must_be_open); | |
| 2553 if (not_found) | |
| 2554 return (1); | |
| 2555 } | |
| 2556 return (0); | |
| 2557 } | |
| 2558 | |
| 2559 /* | |
| 2560 * Make sure this component has other sources | |
| 2561 */ | |
| 2562 (void) (*(smic->sm_get_bcss)) | |
|
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2563 (dev, sm, ci, &block, &count, &skip, &size); |
| 0 | 2564 |
| 2565 if (count == 0) | |
| 2566 return (1); | |
| 2567 | |
| 2568 s = (md_m_shared_t *)(*(smic->sm_shared_by_indx))(dev, sm, ci); | |
| 2569 | |
| 2570 while (count--) { | |
| 2571 if (block >= un->c.un_total_blocks) | |
| 2572 return (0); | |
| 2573 | |
| 2574 if ((block + size) > un->c.un_total_blocks) | |
| 2575 size = un->c.un_total_blocks - block; | |
| 2576 | |
| 2577 not_found = find_another_logical(un, sm, block, size, | |
| 2578 must_be_open, s->ms_state, s->ms_lasterrcnt); | |
| 2579 if (not_found) | |
| 2580 return (1); | |
| 2581 | |
| 2582 block += size + skip; | |
| 2583 } | |
| 2584 return (0); | |
| 2585 } | |
| 2586 | |
| 2587 static void | |
| 2588 finish_error(md_mps_t *ps) | |
| 2589 { | |
| 2590 struct buf *pb; | |
| 2591 mm_unit_t *un; | |
| 2592 mdi_unit_t *ui; | |
| 2593 uint_t new_str_flags; | |
| 2594 | |
| 2595 pb = ps->ps_bp; | |
| 2596 un = ps->ps_un; | |
| 2597 ui = ps->ps_ui; | |
| 2598 | |
| 2599 /* | |
| 2600 * Must flag any error to the resync originator if we're performing | |
| 2601 * a Write-after-Read. This corresponds to an i/o error on a resync | |
| 2602 * target device and in this case we ought to abort the resync as there | |
| 2603 * is nothing that can be done to recover from this without operator | |
| 2604 * intervention. If we don't set the B_ERROR flag we will continue | |
| 2605 * reading from the mirror but won't write to the target (as it will | |
| 2606 * have been placed into an errored state). | |
| 2607 * To handle the case of multiple components within a submirror we only | |
| 2608 * set the B_ERROR bit if explicitly requested to via MD_MPS_FLAG_ERROR. | |
| 2609 * The originator of the resync read will cause this bit to be set if | |
| 2610 * the underlying component count is one for a submirror resync. All | |
| 2611 * other resync types will have the flag set as there is no underlying | |
| 2612 * resync which can be performed on a contained metadevice for these | |
| 2613 * resync types (optimized or component). | |
| 2614 */ | |
| 2615 | |
| 2616 if (ps->ps_flags & MD_MPS_WRITE_AFTER_READ) { | |
| 2617 if (ps->ps_flags & MD_MPS_FLAG_ERROR) | |
| 2618 pb->b_flags |= B_ERROR; | |
| 2619 md_kstat_done(ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 2620 MPS_FREE(mirror_parent_cache, ps); | |
| 2621 md_unit_readerexit(ui); | |
| 2622 md_biodone(pb); | |
| 2623 return; | |
| 2624 } | |
| 2625 /* | |
| 2626 * Set the MD_IO_COUNTED flag as we are retrying the same I/O | |
| 2627 * operation therefore this I/O request has already been counted, | |
| 2628 * the I/O count variable will be decremented by mirror_done()'s | |
| 2629 * call to md_biodone(). | |
| 2630 */ | |
| 2631 if (ps->ps_changecnt != un->un_changecnt) { | |
| 2632 new_str_flags = MD_STR_NOTTOP | MD_IO_COUNTED; | |
| 2633 if (ps->ps_flags & MD_MPS_WOW) | |
| 2634 new_str_flags |= MD_STR_WOW; | |
| 2635 if (ps->ps_flags & MD_MPS_MAPPED) | |
| 2636 new_str_flags |= MD_STR_MAPPED; | |
| 2637 /* | |
| 2638 * If this I/O request was a read that was part of a resync, | |
| 2639 * set MD_STR_WAR for the retried read to ensure that the | |
| 2640 * resync write (i.e. write-after-read) will be performed | |
| 2641 */ | |
| 2642 if (ps->ps_flags & MD_MPS_RESYNC_READ) | |
| 2643 new_str_flags |= MD_STR_WAR; | |
| 2644 md_kstat_done(ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 2645 MPS_FREE(mirror_parent_cache, ps); | |
| 2646 md_unit_readerexit(ui); | |
| 2647 (void) md_mirror_strategy(pb, new_str_flags, NULL); | |
| 2648 return; | |
| 2649 } | |
| 2650 | |
| 2651 pb->b_flags |= B_ERROR; | |
| 2652 md_kstat_done(ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 2653 MPS_FREE(mirror_parent_cache, ps); | |
| 2654 md_unit_readerexit(ui); | |
| 2655 md_biodone(pb); | |
| 2656 } | |
| 2657 | |
| 2658 static void | |
| 2659 error_update_unit(md_mps_t *ps) | |
| 2660 { | |
| 2661 mm_unit_t *un; | |
| 2662 mdi_unit_t *ui; | |
| 2663 int smi; /* sub mirror index */ | |
| 2664 int ci; /* errored component */ | |
| 2665 set_t setno; | |
| 2666 uint_t flags; /* for set_sm_comp_state() */ | |
| 2667 uint_t hspflags; /* for check_comp_4_hotspares() */ | |
| 2668 | |
| 2669 ui = ps->ps_ui; | |
| 2670 un = (mm_unit_t *)md_unit_writerlock(ui); | |
| 2671 setno = MD_UN2SET(un); | |
| 2672 | |
| 2673 /* All of these updates have to propagated in case of MN set */ | |
| 2674 flags = MD_STATE_XMIT; | |
| 2675 hspflags = MD_HOTSPARE_XMIT; | |
| 2676 | |
| 2677 /* special treatment if we are called during updating watermarks */ | |
| 2678 if (ps->ps_flags & MD_MPS_WMUPDATE) { | |
| 2679 flags |= MD_STATE_WMUPDATE; | |
| 2680 hspflags |= MD_HOTSPARE_WMUPDATE; | |
| 2681 } | |
| 2682 smi = 0; | |
| 2683 ci = 0; | |
| 2684 while (mirror_geterror(un, &smi, &ci, 1, 0) != 0) { | |
| 2685 if (mirror_other_sources(un, smi, ci, 0) == 1) { | |
| 2686 | |
| 2687 /* Never called from ioctl context, so (IOLOCK *)NULL */ | |
| 2688 set_sm_comp_state(un, smi, ci, CS_LAST_ERRED, 0, flags, | |
|
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2689 (IOLOCK *)NULL); |
| 0 | 2690 /* |
| 2691 * For a MN set, the NOTIFY is done when the state | |
| 2692 * change is processed on each node | |
| 2693 */ | |
| 2694 if (!MD_MNSET_SETNO(MD_UN2SET(un))) { | |
| 2695 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_LASTERRED, | |
| 2696 SVM_TAG_METADEVICE, setno, MD_SID(un)); | |
| 2697 } | |
| 2698 continue; | |
| 2699 } | |
| 2700 /* Never called from ioctl context, so (IOLOCK *)NULL */ | |
| 2701 set_sm_comp_state(un, smi, ci, CS_ERRED, 0, flags, | |
|
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2702 (IOLOCK *)NULL); |
| 0 | 2703 /* |
| 2704 * For a MN set, the NOTIFY is done when the state | |
| 2705 * change is processed on each node | |
| 2706 */ | |
| 2707 if (!MD_MNSET_SETNO(MD_UN2SET(un))) { | |
| 2708 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_ERRED, | |
| 2709 SVM_TAG_METADEVICE, setno, MD_SID(un)); | |
| 2710 } | |
| 2711 smi = 0; | |
| 2712 ci = 0; | |
| 2713 } | |
| 2714 | |
| 2715 md_unit_writerexit(ui); | |
| 2716 if (MD_MNSET_SETNO(setno)) { | |
| 2717 send_poke_hotspares(setno); | |
| 2718 } else { | |
| 2719 (void) poke_hotspares(); | |
| 2720 } | |
| 2721 (void) md_unit_readerlock(ui); | |
| 2722 | |
| 2723 finish_error(ps); | |
| 2724 } | |
| 2725 | |
| 2726 /* | |
| 2727 * When we have a B_FAILFAST IO error on a Last Erred component we need to | |
| 2728 * retry the IO without B_FAILFAST set so that we try to ensure that the | |
| 2729 * component "sees" each IO. | |
| 2730 */ | |
| 2731 static void | |
| 2732 last_err_retry(md_mcs_t *cs) | |
| 2733 { | |
| 2734 struct buf *cb; | |
| 2735 md_mps_t *ps; | |
| 2736 uint_t flags; | |
| 2737 | |
| 2738 cb = &cs->cs_buf; | |
| 2739 cb->b_flags &= ~B_FAILFAST; | |
| 2740 | |
| 2741 /* if we're panicing just let this I/O error out */ | |
| 2742 if (panicstr) { | |
|
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2743 (void) mirror_done(cb); |
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|
2744 return; |
| 0 | 2745 } |
| 2746 | |
| 2747 /* reissue the I/O */ | |
| 2748 | |
| 2749 ps = cs->cs_ps; | |
| 2750 | |
| 2751 bioerror(cb, 0); | |
| 2752 | |
| 2753 mutex_enter(&ps->ps_mx); | |
| 2754 | |
| 2755 flags = MD_STR_NOTTOP; | |
| 2756 if (ps->ps_flags & MD_MPS_MAPPED) | |
| 2757 flags |= MD_STR_MAPPED; | |
| 2758 if (ps->ps_flags & MD_MPS_NOBLOCK) | |
| 2759 flags |= MD_NOBLOCK; | |
| 2760 | |
| 2761 mutex_exit(&ps->ps_mx); | |
| 2762 | |
| 2763 clear_retry_error(cb); | |
| 2764 | |
| 2765 cmn_err(CE_NOTE, "!md: %s: Last Erred, retry I/O without B_FAILFAST", | |
|
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2766 md_shortname(getminor(cb->b_edev))); |
| 0 | 2767 |
| 2768 md_call_strategy(cb, flags, NULL); | |
| 2769 } | |
| 2770 | |
| 2771 static void | |
| 2772 mirror_error(md_mps_t *ps) | |
| 2773 { | |
| 2774 int smi; /* sub mirror index */ | |
| 2775 int ci; /* errored component */ | |
| 2776 | |
| 2777 if (panicstr) { | |
| 2778 finish_error(ps); | |
| 2779 return; | |
| 2780 } | |
| 2781 | |
| 2782 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
2783 mirror_overlap_tree_remove(ps); |
| 0 | 2784 |
| 2785 smi = 0; | |
| 2786 ci = 0; | |
| 2787 if (mirror_geterror(ps->ps_un, &smi, &ci, 0, 0) != 0) { | |
| 2788 md_unit_readerexit(ps->ps_ui); | |
| 2789 daemon_request(&md_mstr_daemon, error_update_unit, | |
| 2790 (daemon_queue_t *)ps, REQ_OLD); | |
| 2791 return; | |
| 2792 } | |
| 2793 | |
| 2794 finish_error(ps); | |
| 2795 } | |
| 2796 | |
| 2797 static int | |
| 2798 copy_write_done(struct buf *cb) | |
| 2799 { | |
| 2800 md_mps_t *ps; | |
| 2801 buf_t *pb; | |
| 2802 char *wowbuf; | |
| 2803 wowhdr_t *wowhdr; | |
| 2804 ssize_t wow_resid; | |
| 2805 | |
| 2806 /* get wowbuf ans save structure */ | |
| 2807 wowbuf = cb->b_un.b_addr; | |
| 2808 wowhdr = WOWBUF_HDR(wowbuf); | |
| 2809 ps = wowhdr->wow_ps; | |
| 2810 pb = ps->ps_bp; | |
| 2811 | |
| 2812 /* Save error information, then free cb */ | |
| 2813 if (cb->b_flags & B_ERROR) | |
| 2814 pb->b_flags |= B_ERROR; | |
| 2815 | |
| 2816 if (cb->b_flags & B_REMAPPED) | |
| 2817 bp_mapout(cb); | |
| 2818 | |
| 2819 freerbuf(cb); | |
| 2820 | |
| 2821 /* update residual and continue if needed */ | |
| 2822 if ((pb->b_flags & B_ERROR) == 0) { | |
| 2823 wow_resid = pb->b_bcount - wowhdr->wow_offset; | |
| 2824 pb->b_resid = wow_resid; | |
| 2825 if (wow_resid > 0) { | |
| 2826 daemon_request(&md_mstr_daemon, copy_write_cont, | |
| 2827 (daemon_queue_t *)wowhdr, REQ_OLD); | |
| 2828 return (1); | |
| 2829 } | |
| 2830 } | |
| 2831 | |
| 2832 /* Write is complete, release resources. */ | |
| 2833 kmem_cache_free(mirror_wowblk_cache, wowhdr); | |
| 2834 ASSERT(!(ps->ps_flags & MD_MPS_ON_OVERLAP)); | |
| 2835 md_kstat_done(ps->ps_ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 2836 MPS_FREE(mirror_parent_cache, ps); | |
| 2837 md_biodone(pb); | |
| 2838 return (0); | |
| 2839 } | |
| 2840 | |
| 2841 static void | |
| 2842 copy_write_cont(wowhdr_t *wowhdr) | |
| 2843 { | |
| 2844 buf_t *pb; | |
| 2845 buf_t *cb; | |
| 2846 char *wowbuf; | |
| 2847 int wow_offset; | |
| 2848 size_t wow_resid; | |
| 2849 diskaddr_t wow_blkno; | |
| 2850 | |
| 2851 wowbuf = WOWHDR_BUF(wowhdr); | |
| 2852 pb = wowhdr->wow_ps->ps_bp; | |
| 2853 | |
| 2854 /* get data on current location */ | |
| 2855 wow_offset = wowhdr->wow_offset; | |
| 2856 wow_resid = pb->b_bcount - wow_offset; | |
| 2857 wow_blkno = pb->b_lblkno + lbtodb(wow_offset); | |
| 2858 | |
| 2859 /* setup child buffer */ | |
| 2860 cb = getrbuf(KM_SLEEP); | |
| 2861 cb->b_flags = B_WRITE; | |
| 2862 cb->b_edev = pb->b_edev; | |
| 2863 cb->b_un.b_addr = wowbuf; /* change to point at WOWBUF */ | |
| 2864 cb->b_bufsize = md_wowbuf_size; /* change to wowbuf_size */ | |
| 2865 cb->b_iodone = copy_write_done; | |
| 2866 cb->b_bcount = MIN(md_wowbuf_size, wow_resid); | |
| 2867 cb->b_lblkno = wow_blkno; | |
| 2868 | |
| 2869 /* move offset to next section */ | |
| 2870 wowhdr->wow_offset += cb->b_bcount; | |
| 2871 | |
| 2872 /* copy and setup write for current section */ | |
| 2873 bcopy(&pb->b_un.b_addr[wow_offset], wowbuf, cb->b_bcount); | |
| 2874 | |
| 2875 /* do it */ | |
| 2876 /* | |
| 2877 * Do not set the MD_IO_COUNTED flag as this is a new I/O request | |
| 2878 * that handles the WOW condition. The resultant increment on the | |
| 2879 * I/O count variable is cleared by copy_write_done()'s call to | |
| 2880 * md_biodone(). | |
| 2881 */ | |
| 2882 (void) md_mirror_strategy(cb, MD_STR_NOTTOP | MD_STR_WOW | |
|
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2883 | MD_STR_MAPPED, NULL); |
| 0 | 2884 } |
| 2885 | |
| 2886 static void | |
| 2887 md_mirror_copy_write(md_mps_t *ps) | |
| 2888 { | |
| 2889 wowhdr_t *wowhdr; | |
| 2890 | |
| 2891 wowhdr = kmem_cache_alloc(mirror_wowblk_cache, MD_ALLOCFLAGS); | |
| 2892 mirror_wowblk_init(wowhdr); | |
| 2893 wowhdr->wow_ps = ps; | |
| 2894 wowhdr->wow_offset = 0; | |
| 2895 copy_write_cont(wowhdr); | |
| 2896 } | |
| 2897 | |
| 2898 static void | |
| 2899 handle_wow(md_mps_t *ps) | |
| 2900 { | |
| 2901 buf_t *pb; | |
| 2902 | |
| 2903 pb = ps->ps_bp; | |
| 2904 | |
| 2905 bp_mapin(pb); | |
| 2906 | |
| 2907 md_mirror_wow_cnt++; | |
| 2908 if (!(pb->b_flags & B_PHYS) && (md_mirror_wow_flg & WOW_LOGIT)) { | |
| 2909 cmn_err(CE_NOTE, | |
| 2910 "md: %s, blk %lld, cnt %ld: Write on write %d occurred", | |
| 2911 md_shortname(getminor(pb->b_edev)), | |
| 2912 (longlong_t)pb->b_lblkno, pb->b_bcount, md_mirror_wow_cnt); | |
| 2913 } | |
| 2914 | |
| 2915 /* | |
| 2916 * Set the MD_IO_COUNTED flag as we are retrying the same I/O | |
| 2917 * operation therefore this I/O request has already been counted, | |
| 2918 * the I/O count variable will be decremented by mirror_done()'s | |
| 2919 * call to md_biodone(). | |
| 2920 */ | |
| 2921 if (md_mirror_wow_flg & WOW_NOCOPY) | |
| 2922 (void) md_mirror_strategy(pb, MD_STR_NOTTOP | MD_STR_WOW | | |
|
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2923 MD_STR_MAPPED | MD_IO_COUNTED, ps); |
| 0 | 2924 else |
| 2925 md_mirror_copy_write(ps); | |
| 2926 } | |
| 2927 | |
| 2928 /* | |
| 2929 * Return true if the specified submirror is either in the Last Erred | |
| 2930 * state or is transitioning into the Last Erred state. | |
| 2931 */ | |
| 2932 static bool_t | |
| 2933 submirror_is_lasterred(mm_unit_t *un, int smi) | |
| 2934 { | |
| 2935 mm_submirror_t *sm; | |
| 2936 mm_submirror_ic_t *smic; | |
| 2937 md_m_shared_t *shared; | |
| 2938 int ci; | |
| 2939 int compcnt; | |
| 2940 | |
| 2941 sm = &un->un_sm[smi]; | |
| 2942 smic = &un->un_smic[smi]; | |
| 2943 | |
| 2944 compcnt = (*(smic->sm_get_component_count)) (sm->sm_dev, un); | |
| 2945 for (ci = 0; ci < compcnt; ci++) { | |
| 2946 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) | |
| 2947 (sm->sm_dev, sm, ci); | |
| 2948 | |
| 2949 if (shared->ms_state == CS_LAST_ERRED) | |
| 2950 return (B_TRUE); | |
| 2951 | |
| 2952 /* | |
| 2953 * It is not currently Last Erred, check if entering Last Erred. | |
| 2954 */ | |
| 2955 if ((shared->ms_flags & MDM_S_IOERR) && | |
| 2956 ((shared->ms_state == CS_OKAY) || | |
| 2957 (shared->ms_state == CS_RESYNC))) { | |
| 2958 if (mirror_other_sources(un, smi, ci, 0) == 1) | |
| 2959 return (B_TRUE); | |
| 2960 } | |
| 2961 } | |
| 2962 | |
| 2963 return (B_FALSE); | |
| 2964 } | |
| 2965 | |
| 2966 | |
| 2967 static int | |
| 2968 mirror_done(struct buf *cb) | |
| 2969 { | |
| 2970 md_mps_t *ps; | |
| 2971 md_mcs_t *cs; | |
| 2972 | |
| 2973 /*LINTED*/ | |
| 2974 cs = (md_mcs_t *)((caddr_t)cb - md_mirror_mcs_buf_off); | |
| 2975 ps = cs->cs_ps; | |
| 2976 | |
| 2977 mutex_enter(&ps->ps_mx); | |
| 2978 | |
| 2979 /* check if we need to retry an errored failfast I/O */ | |
| 2980 if (cb->b_flags & B_ERROR) { | |
| 2981 struct buf *pb = ps->ps_bp; | |
| 2982 | |
| 2983 if (cb->b_flags & B_FAILFAST) { | |
| 2984 int i; | |
| 2985 mm_unit_t *un = ps->ps_un; | |
| 2986 | |
| 2987 for (i = 0; i < NMIRROR; i++) { | |
| 2988 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) | |
| 2989 continue; | |
| 2990 | |
| 2991 if (cb->b_edev == | |
| 2992 md_dev64_to_dev(un->un_sm[i].sm_dev)) { | |
| 2993 | |
| 2994 /* | |
| 2995 * This is the submirror that had the | |
| 2996 * error. Check if it is Last Erred. | |
| 2997 */ | |
| 2998 if (submirror_is_lasterred(un, i)) { | |
| 2999 daemon_queue_t *dqp; | |
| 3000 | |
| 3001 mutex_exit(&ps->ps_mx); | |
| 3002 dqp = (daemon_queue_t *)cs; | |
| 3003 dqp->dq_prev = NULL; | |
| 3004 dqp->dq_next = NULL; | |
| 3005 daemon_request(&md_done_daemon, | |
| 3006 last_err_retry, dqp, | |
| 3007 REQ_OLD); | |
| 3008 return (1); | |
| 3009 } | |
| 3010 break; | |
| 3011 } | |
| 3012 } | |
| 3013 } | |
| 3014 | |
| 3015 /* continue to process the buf without doing a retry */ | |
| 3016 ps->ps_flags |= MD_MPS_ERROR; | |
| 3017 pb->b_error = cb->b_error; | |
| 3018 } | |
| 3019 | |
| 3020 return (mirror_done_common(cb)); | |
| 3021 } | |
| 3022 | |
| 3023 /* | |
| 3024 * Split from the original mirror_done function so we can handle bufs after a | |
| 3025 * retry. | |
| 3026 * ps->ps_mx is already held in the caller of this function and the cb error | |
| 3027 * has already been checked and handled in the caller. | |
| 3028 */ | |
| 3029 static int | |
| 3030 mirror_done_common(struct buf *cb) | |
| 3031 { | |
| 3032 struct buf *pb; | |
| 3033 mm_unit_t *un; | |
| 3034 mdi_unit_t *ui; | |
| 3035 md_mps_t *ps; | |
| 3036 md_mcs_t *cs; | |
| 3037 size_t end_rr, start_rr, current_rr; | |
| 3038 | |
| 3039 /*LINTED*/ | |
| 3040 cs = (md_mcs_t *)((caddr_t)cb - md_mirror_mcs_buf_off); | |
| 3041 ps = cs->cs_ps; | |
| 3042 pb = ps->ps_bp; | |
| 3043 | |
| 3044 if (cb->b_flags & B_REMAPPED) | |
| 3045 bp_mapout(cb); | |
| 3046 | |
| 3047 ps->ps_frags--; | |
| 3048 if (ps->ps_frags != 0) { | |
| 3049 mutex_exit(&ps->ps_mx); | |
| 3050 kmem_cache_free(mirror_child_cache, cs); | |
| 3051 return (1); | |
| 3052 } | |
| 3053 un = ps->ps_un; | |
| 3054 ui = ps->ps_ui; | |
| 3055 | |
| 3056 /* | |
| 3057 * Do not update outstanding_writes if we're running with ABR | |
| 3058 * set for this mirror or the write() was issued with MD_STR_ABR set. | |
| 3059 * Also a resync initiated write() has no outstanding_writes update | |
| 3060 * either. | |
| 3061 */ | |
| 3062 if (((cb->b_flags & B_READ) == 0) && | |
| 3063 (un->un_nsm >= 2) && | |
| 3064 (ps->ps_call == NULL) && | |
| 3065 !((ui->ui_tstate & MD_ABR_CAP) || (ps->ps_flags & MD_MPS_ABR)) && | |
| 3066 !(ps->ps_flags & MD_MPS_WRITE_AFTER_READ)) { | |
| 3067 BLK_TO_RR(end_rr, ps->ps_lastblk, un); | |
| 3068 BLK_TO_RR(start_rr, ps->ps_firstblk, un); | |
| 3069 mutex_enter(&un->un_resync_mx); | |
| 3070 for (current_rr = start_rr; current_rr <= end_rr; current_rr++) | |
| 3071 un->un_outstanding_writes[current_rr]--; | |
| 3072 mutex_exit(&un->un_resync_mx); | |
| 3073 } | |
| 3074 kmem_cache_free(mirror_child_cache, cs); | |
| 3075 mutex_exit(&ps->ps_mx); | |
| 3076 | |
| 3077 if (ps->ps_call != NULL) { | |
| 3078 daemon_request(&md_done_daemon, ps->ps_call, | |
| 3079 (daemon_queue_t *)ps, REQ_OLD); | |
| 3080 return (1); | |
| 3081 } | |
| 3082 | |
| 3083 if ((ps->ps_flags & MD_MPS_ERROR)) { | |
| 3084 daemon_request(&md_done_daemon, mirror_error, | |
| 3085 (daemon_queue_t *)ps, REQ_OLD); | |
| 3086 return (1); | |
| 3087 } | |
| 3088 | |
| 3089 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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3090 mirror_overlap_tree_remove(ps); |
| 0 | 3091 |
| 3092 /* | |
| 3093 * Handle Write-on-Write problem. | |
| 3094 * Skip In case of Raw and Direct I/O as they are | |
| 3095 * handled earlier. | |
| 3096 * | |
| 3097 */ | |
| 3098 if (!(md_mirror_wow_flg & WOW_DISABLE) && | |
| 3099 !(pb->b_flags & B_READ) && | |
| 3100 !(ps->ps_flags & MD_MPS_WOW) && | |
| 3101 !(pb->b_flags & B_PHYS) && | |
| 3102 any_pages_dirty(pb)) { | |
| 3103 md_unit_readerexit(ps->ps_ui); | |
| 3104 daemon_request(&md_mstr_daemon, handle_wow, | |
| 3105 (daemon_queue_t *)ps, REQ_OLD); | |
| 3106 return (1); | |
| 3107 } | |
| 3108 | |
| 3109 md_kstat_done(ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 3110 MPS_FREE(mirror_parent_cache, ps); | |
| 3111 md_unit_readerexit(ui); | |
| 3112 md_biodone(pb); | |
| 3113 return (0); | |
| 3114 } | |
| 3115 | |
| 3116 /* | |
| 3117 * Clear error state in submirror component if the retry worked after | |
| 3118 * a failfast error. | |
| 3119 */ | |
| 3120 static void | |
| 3121 clear_retry_error(struct buf *cb) | |
| 3122 { | |
| 3123 int smi; | |
| 3124 md_mcs_t *cs; | |
| 3125 mm_unit_t *un; | |
| 3126 mdi_unit_t *ui_sm; | |
| 3127 mm_submirror_t *sm; | |
| 3128 mm_submirror_ic_t *smic; | |
| 3129 u_longlong_t cnt; | |
| 3130 md_m_shared_t *shared; | |
| 3131 | |
| 3132 /*LINTED*/ | |
| 3133 cs = (md_mcs_t *)((caddr_t)cb - md_mirror_mcs_buf_off); | |
| 3134 un = cs->cs_ps->ps_un; | |
| 3135 | |
| 3136 for (smi = 0; smi < NMIRROR; smi++) { | |
|
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3137 if (!SMS_BY_INDEX_IS(un, smi, SMS_INUSE)) |
|
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3138 continue; |
|
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3139 |
|
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3140 if (cb->b_edev == md_dev64_to_dev(un->un_sm[smi].sm_dev)) |
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3141 break; |
| 0 | 3142 } |
| 3143 | |
| 3144 if (smi >= NMIRROR) | |
|
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3145 return; |
| 0 | 3146 |
| 3147 sm = &un->un_sm[smi]; | |
| 3148 smic = &un->un_smic[smi]; | |
| 3149 cnt = cb->b_bcount; | |
| 3150 | |
| 3151 ui_sm = MDI_UNIT(getminor(cb->b_edev)); | |
| 3152 (void) md_unit_writerlock(ui_sm); | |
| 3153 | |
| 3154 shared = (md_m_shared_t *)(*(smic->sm_shared_by_blk))(sm->sm_dev, sm, | |
| 3155 cb->b_blkno, &cnt); | |
| 3156 | |
| 3157 if (shared->ms_flags & MDM_S_IOERR) { | |
|
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3158 shared->ms_flags &= ~MDM_S_IOERR; |
| 0 | 3159 |
| 3160 } else { | |
|
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3161 /* the buf spans components and the first one is not erred */ |
|
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3162 int cnt; |
|
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3163 int i; |
|
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3164 |
|
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3165 cnt = (*(smic->sm_get_component_count))(sm->sm_dev, un); |
|
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3166 for (i = 0; i < cnt; i++) { |
|
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3167 shared = (md_m_shared_t *)(*(smic->sm_shared_by_indx)) |
|
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3168 (sm->sm_dev, sm, i); |
|
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|
3169 |
|
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3170 if (shared->ms_flags & MDM_S_IOERR && |
|
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3171 shared->ms_state == CS_OKAY) { |
|
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3172 |
|
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|
3173 shared->ms_flags &= ~MDM_S_IOERR; |
|
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|
3174 break; |
|
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|
3175 } |
| 0 | 3176 } |
| 3177 } | |
| 3178 | |
| 3179 md_unit_writerexit(ui_sm); | |
| 3180 } | |
| 3181 | |
| 3182 static size_t | |
| 3183 mirror_map_read( | |
| 3184 md_mps_t *ps, | |
| 3185 md_mcs_t *cs, | |
| 3186 diskaddr_t blkno, | |
| 3187 u_longlong_t count | |
| 3188 ) | |
| 3189 { | |
| 3190 mm_unit_t *un; | |
| 3191 buf_t *bp; | |
| 3192 u_longlong_t cando; | |
| 3193 | |
| 3194 bp = &cs->cs_buf; | |
| 3195 un = ps->ps_un; | |
| 3196 | |
| 3197 bp->b_lblkno = blkno; | |
| 3198 if (fast_select_read_unit(ps, cs) == 0) { | |
| 3199 bp->b_bcount = ldbtob(count); | |
| 3200 return (0); | |
| 3201 } | |
|
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|
3202 bp->b_edev = md_dev64_to_dev(select_read_unit(un, blkno, |
|
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|
3203 count, &cando, 0, NULL, cs)); |
| 0 | 3204 bp->b_bcount = ldbtob(cando); |
| 3205 if (count != cando) | |
| 3206 return (cando); | |
| 3207 return (0); | |
| 3208 } | |
| 3209 | |
| 3210 static void | |
| 3211 write_after_read(md_mps_t *ps) | |
| 3212 { | |
| 3213 struct buf *pb; | |
| 3214 int flags; | |
| 3215 | |
| 3216 if (ps->ps_flags & MD_MPS_ERROR) { | |
| 3217 mirror_error(ps); | |
| 3218 return; | |
| 3219 } | |
| 3220 | |
| 3221 pb = ps->ps_bp; | |
| 3222 md_kstat_done(ps->ps_ui, pb, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 3223 ps->ps_call = NULL; | |
| 3224 ps->ps_flags |= MD_MPS_WRITE_AFTER_READ; | |
| 3225 flags = MD_STR_NOTTOP | MD_STR_WAR; | |
| 3226 if (ps->ps_flags & MD_MPS_MAPPED) | |
| 3227 flags |= MD_STR_MAPPED; | |
| 3228 if (ps->ps_flags & MD_MPS_NOBLOCK) | |
| 3229 flags |= MD_NOBLOCK; | |
| 3230 if (ps->ps_flags & MD_MPS_DIRTY_RD) | |
| 3231 flags |= MD_STR_DIRTY_RD; | |
| 3232 (void) mirror_write_strategy(pb, flags, ps); | |
| 3233 } | |
| 3234 | |
| 3235 static void | |
| 3236 continue_serial(md_mps_t *ps) | |
| 3237 { | |
| 3238 md_mcs_t *cs; | |
| 3239 buf_t *cb; | |
| 3240 mm_unit_t *un; | |
| 3241 int flags; | |
| 3242 | |
| 3243 un = ps->ps_un; | |
| 3244 cs = kmem_cache_alloc(mirror_child_cache, MD_ALLOCFLAGS); | |
| 3245 mirror_child_init(cs); | |
| 3246 cb = &cs->cs_buf; | |
| 3247 ps->ps_call = NULL; | |
| 3248 ps->ps_frags = 1; | |
| 3249 (void) mirror_map_write(un, cs, ps, 0); | |
| 3250 flags = MD_STR_NOTTOP; | |
| 3251 if (ps->ps_flags & MD_MPS_MAPPED) | |
| 3252 flags |= MD_STR_MAPPED; | |
| 3253 md_call_strategy(cb, flags, NULL); | |
| 3254 } | |
| 3255 | |
| 3256 static int | |
| 3257 mirror_map_write(mm_unit_t *un, md_mcs_t *cs, md_mps_t *ps, int war) | |
| 3258 { | |
| 3259 int i; | |
| 3260 dev_t dev; /* needed for bioclone, so not md_dev64_t */ | |
| 3261 buf_t *cb; | |
| 3262 buf_t *pb; | |
| 3263 diskaddr_t blkno; | |
| 3264 size_t bcount; | |
| 3265 off_t offset; | |
| 3266 | |
| 3267 pb = ps->ps_bp; | |
| 3268 cb = &cs->cs_buf; | |
| 3269 cs->cs_ps = ps; | |
| 3270 | |
| 3271 i = md_find_nth_unit(ps->ps_writable_sm, ps->ps_current_sm); | |
| 3272 | |
| 3273 dev = md_dev64_to_dev(un->un_sm[i].sm_dev); | |
| 3274 | |
| 3275 blkno = pb->b_lblkno; | |
| 3276 bcount = pb->b_bcount; | |
| 3277 offset = 0; | |
| 3278 if (war && (blkno == 0) && (un->c.un_flag & MD_LABELED)) { | |
| 3279 blkno = DK_LABEL_LOC + 1; | |
| 3280 /* | |
| 3281 * This handles the case where we're requesting | |
| 3282 * a write to block 0 on a label partition | |
| 3283 * and the request size was smaller than the | |
| 3284 * size of the label. If this is the case | |
| 3285 * then we'll return -1. Failure to do so will | |
| 3286 * either cause the calling thread to hang due to | |
| 3287 * an ssd bug, or worse if the bcount were allowed | |
| 3288 * to go negative (ie large). | |
| 3289 */ | |
| 3290 if (bcount <= DEV_BSIZE*(DK_LABEL_LOC + 1)) | |
| 3291 return (-1); | |
| 3292 bcount -= (DEV_BSIZE*(DK_LABEL_LOC + 1)); | |
| 3293 offset = (DEV_BSIZE*(DK_LABEL_LOC + 1)); | |
| 3294 } | |
| 3295 | |
| 3296 cb = md_bioclone(pb, offset, bcount, dev, blkno, mirror_done, | |
| 3297 cb, KM_NOSLEEP); | |
| 3298 if (war) | |
| 3299 cb->b_flags = (cb->b_flags & ~B_READ) | B_WRITE; | |
| 3300 | |
| 3301 /* | |
| 3302 * If the submirror is in the erred stated, check if any component is | |
| 3303 * in the Last Erred state. If so, we don't want to use the B_FAILFAST | |
| 3304 * flag on the IO. | |
| 3305 * | |
| 3306 * Provide a fast path for the non-erred case (which should be the | |
| 3307 * normal case). | |
| 3308 */ | |
| 3309 if (un->un_sm[i].sm_flags & MD_SM_FAILFAST) { | |
| 3310 if (un->un_sm[i].sm_state & SMS_COMP_ERRED) { | |
| 3311 mm_submirror_t *sm; | |
| 3312 mm_submirror_ic_t *smic; | |
| 3313 int ci; | |
| 3314 int compcnt; | |
| 3315 | |
| 3316 sm = &un->un_sm[i]; | |
| 3317 smic = &un->un_smic[i]; | |
| 3318 | |
| 3319 compcnt = (*(smic->sm_get_component_count)) | |
| 3320 (sm->sm_dev, un); | |
| 3321 for (ci = 0; ci < compcnt; ci++) { | |
| 3322 md_m_shared_t *shared; | |
| 3323 | |
| 3324 shared = (md_m_shared_t *) | |
| 3325 (*(smic->sm_shared_by_indx))(sm->sm_dev, | |
| 3326 sm, ci); | |
| 3327 | |
| 3328 if (shared->ms_state == CS_LAST_ERRED) | |
| 3329 break; | |
| 3330 } | |
| 3331 if (ci >= compcnt) | |
| 3332 cb->b_flags |= B_FAILFAST; | |
| 3333 | |
| 3334 } else { | |
| 3335 cb->b_flags |= B_FAILFAST; | |
| 3336 } | |
| 3337 } | |
| 3338 | |
| 3339 ps->ps_current_sm++; | |
| 3340 if (ps->ps_current_sm != ps->ps_active_cnt) { | |
| 3341 if (un->un_write_option == WR_SERIAL) { | |
| 3342 ps->ps_call = continue_serial; | |
| 3343 return (0); | |
| 3344 } | |
| 3345 return (1); | |
| 3346 } | |
| 3347 return (0); | |
| 3348 } | |
| 3349 | |
| 3350 /* | |
| 3351 * directed_read_done: | |
| 3352 * ------------------ | |
| 3353 * Completion routine called when a DMR request has been returned from the | |
| 3354 * underlying driver. Wake-up the original ioctl() and return the data to | |
| 3355 * the user. | |
| 3356 */ | |
| 3357 static void | |
| 3358 directed_read_done(md_mps_t *ps) | |
| 3359 { | |
| 3360 mm_unit_t *un; | |
| 3361 mdi_unit_t *ui; | |
| 3362 | |
| 3363 un = ps->ps_un; | |
| 3364 ui = ps->ps_ui; | |
| 3365 | |
| 3366 md_unit_readerexit(ui); | |
| 3367 md_kstat_done(ui, ps->ps_bp, (ps->ps_flags & MD_MPS_WRITE_AFTER_READ)); | |
| 3368 ps->ps_call = NULL; | |
| 3369 | |
| 3370 mutex_enter(&un->un_dmr_mx); | |
| 3371 cv_signal(&un->un_dmr_cv); | |
| 3372 mutex_exit(&un->un_dmr_mx); | |
| 3373 | |
| 3374 /* release the parent structure */ | |
| 3375 kmem_cache_free(mirror_parent_cache, ps); | |
| 3376 } | |
| 3377 | |
| 3378 /* | |
| 3379 * daemon_io: | |
| 3380 * ------------ | |
| 3381 * Called to issue a mirror_write_strategy() or mirror_read_strategy | |
| 3382 * call from a blockable context. NOTE: no mutex can be held on entry to this | |
| 3383 * routine | |
| 3384 */ | |
| 3385 static void | |
| 3386 daemon_io(daemon_queue_t *dq) | |
| 3387 { | |
| 3388 md_mps_t *ps = (md_mps_t *)dq; | |
| 3389 int flag = MD_STR_NOTTOP; | |
| 3390 buf_t *pb = ps->ps_bp; | |
| 3391 | |
| 3392 if (ps->ps_flags & MD_MPS_MAPPED) | |
| 3393 flag |= MD_STR_MAPPED; | |
| 3394 if (ps->ps_flags & MD_MPS_WOW) | |
| 3395 flag |= MD_STR_WOW; | |
| 3396 if (ps->ps_flags & MD_MPS_WRITE_AFTER_READ) | |
| 3397 flag |= MD_STR_WAR; | |
| 3398 if (ps->ps_flags & MD_MPS_ABR) | |
| 3399 flag |= MD_STR_ABR; | |
| 3400 | |
| 3401 /* | |
| 3402 * If this is a resync read, ie MD_STR_DIRTY_RD not set, set | |
| 3403 * MD_STR_WAR before calling mirror_read_strategy | |
| 3404 */ | |
| 3405 if (pb->b_flags & B_READ) { | |
| 3406 if (!(ps->ps_flags & MD_MPS_DIRTY_RD)) | |
| 3407 flag |= MD_STR_WAR; | |
| 3408 mirror_read_strategy(pb, flag, ps); | |
| 3409 } else | |
| 3410 mirror_write_strategy(pb, flag, ps); | |
| 3411 } | |
| 3412 | |
| 3413 /* | |
| 3414 * update_resync: | |
| 3415 * ------------- | |
| 3416 * Called to update the in-core version of the resync record with the latest | |
| 3417 * version that was committed to disk when the previous mirror owner | |
| 3418 * relinquished ownership. This call is likely to block as we must hold-off | |
| 3419 * any current resync processing that may be occurring. | |
| 3420 * On completion of the resync record update we issue the mirror_write_strategy | |
| 3421 * call to complete the i/o that first started this sequence. To remove a race | |
| 3422 * condition between a new write() request which is submitted and the resync | |
| 3423 * record update we acquire the writerlock. This will hold off all i/o to the | |
| 3424 * mirror until the resync update has completed. | |
| 3425 * NOTE: no mutex can be held on entry to this routine | |
| 3426 */ | |
| 3427 static void | |
| 3428 update_resync(daemon_queue_t *dq) | |
| 3429 { | |
| 3430 md_mps_t *ps = (md_mps_t *)dq; | |
| 3431 buf_t *pb = ps->ps_bp; | |
| 3432 mdi_unit_t *ui = ps->ps_ui; | |
| 3433 mm_unit_t *un; | |
| 3434 set_t setno; | |
| 3435 int restart_resync; | |
| 3436 | |
| 3437 un = md_unit_writerlock(ui); | |
| 3438 ps->ps_un = un; | |
| 3439 setno = MD_MIN2SET(getminor(pb->b_edev)); | |
| 3440 if (mddb_reread_rr(setno, un->un_rr_dirty_recid) == 0) { | |
| 3441 /* | |
| 3442 * Synchronize our in-core view of what regions need to be | |
| 3443 * resync'd with the on-disk version. | |
| 3444 */ | |
| 3445 mutex_enter(&un->un_rrp_inflight_mx); | |
| 3446 mirror_copy_rr(howmany(un->un_rrd_num, NBBY), un->un_resync_bm, | |
| 3447 un->un_dirty_bm); | |
| 3448 mutex_exit(&un->un_rrp_inflight_mx); | |
| 3449 | |
| 3450 /* Region dirty map is now up to date */ | |
| 3451 } | |
| 3452 restart_resync = (un->un_rs_thread_flags & MD_RI_BLOCK_OWNER) ? 1 : 0; | |
| 3453 md_unit_writerexit(ui); | |
| 3454 | |
| 3455 /* Restart the resync thread if it was previously blocked */ | |
| 3456 if (restart_resync) { | |
| 3457 mutex_enter(&un->un_rs_thread_mx); | |
| 3458 un->un_rs_thread_flags &= ~MD_RI_BLOCK_OWNER; | |
| 3459 cv_signal(&un->un_rs_thread_cv); | |
| 3460 mutex_exit(&un->un_rs_thread_mx); | |
| 3461 } | |
| 3462 /* Continue with original deferred i/o */ | |
| 3463 daemon_io(dq); | |
| 3464 } | |
| 3465 | |
| 3466 /* | |
| 3467 * owner_timeout: | |
| 3468 * ------------- | |
| 3469 * Called if the original mdmn_ksend_message() failed and the request is to be | |
| 3470 * retried. Reattempt the original ownership change. | |
| 3471 * | |
| 3472 * NOTE: called at interrupt context (see timeout(9f)). | |
| 3473 */ | |
| 3474 static void | |
| 3475 owner_timeout(void *arg) | |
| 3476 { | |
| 3477 daemon_queue_t *dq = (daemon_queue_t *)arg; | |
| 3478 | |
| 3479 daemon_request(&md_mirror_daemon, become_owner, dq, REQ_OLD); | |
| 3480 } | |
| 3481 | |
| 3482 /* | |
| 3483 * become_owner: | |
| 3484 * ------------ | |
| 3485 * Called to issue RPC request to become the owner of the mirror | |
| 3486 * associated with this i/o request. We assume that the ownership request | |
| 3487 * is synchronous, so if it succeeds we will issue the request via | |
| 3488 * mirror_write_strategy(). | |
| 3489 * If multiple i/o's are outstanding we will be called from the mirror_daemon | |
| 3490 * service thread. | |
| 3491 * NOTE: no mutex should be held on entry to this routine. | |
| 3492 */ | |
| 3493 static void | |
| 3494 become_owner(daemon_queue_t *dq) | |
| 3495 { | |
| 3496 md_mps_t *ps = (md_mps_t *)dq; | |
| 3497 mm_unit_t *un = ps->ps_un; | |
| 3498 buf_t *pb = ps->ps_bp; | |
| 3499 set_t setno; | |
| 3500 md_mn_kresult_t *kres; | |
| 3501 int msg_flags = md_mirror_msg_flags; | |
| 3502 md_mps_t *ps1; | |
| 3503 | |
| 3504 ASSERT(dq->dq_next == NULL && dq->dq_prev == NULL); | |
| 3505 | |
| 3506 /* | |
| 3507 * If we're already the mirror owner we do not need to send a message | |
| 3508 * but can simply process the i/o request immediately. | |
| 3509 * If we've already sent the request to become owner we requeue the | |
| 3510 * request as we're waiting for the synchronous ownership message to | |
| 3511 * be processed. | |
| 3512 */ | |
| 3513 if (MD_MN_MIRROR_OWNER(un)) { | |
| 3514 /* | |
| 3515 * As the strategy() call will potentially block we need to | |
| 3516 * punt this to a separate thread and complete this request | |
| 3517 * as quickly as possible. Note: if we're a read request | |
| 3518 * this must be a resync, we cannot afford to be queued | |
| 3519 * behind any intervening i/o requests. In this case we put the | |
| 3520 * request on the md_mirror_rs_daemon queue. | |
| 3521 */ | |
| 3522 if (pb->b_flags & B_READ) { | |
| 3523 daemon_request(&md_mirror_rs_daemon, daemon_io, dq, | |
| 3524 REQ_OLD); | |
| 3525 } else { | |
| 3526 daemon_request(&md_mirror_io_daemon, daemon_io, dq, | |
| 3527 REQ_OLD); | |
| 3528 } | |
| 3529 } else { | |
| 3530 mutex_enter(&un->un_owner_mx); | |
| 3531 if ((un->un_owner_state & MM_MN_OWNER_SENT) == 0) { | |
| 3532 md_mn_req_owner_t *msg; | |
| 3533 int rval = 0; | |
| 3534 | |
| 3535 /* | |
| 3536 * Check to see that we haven't exceeded the maximum | |
| 3537 * retry count. If we have we fail the i/o as the | |
| 3538 * comms mechanism has become wedged beyond recovery. | |
| 3539 */ | |
| 3540 if (dq->qlen++ >= MD_OWNER_RETRIES) { | |
| 3541 mutex_exit(&un->un_owner_mx); | |
| 3542 cmn_err(CE_WARN, | |
| 3543 "md_mirror: Request exhausted ownership " | |
| 3544 "retry limit of %d attempts", dq->qlen); | |
| 3545 pb->b_error = EIO; | |
| 3546 pb->b_flags |= B_ERROR; | |
| 3547 pb->b_resid = pb->b_bcount; | |
| 3548 kmem_cache_free(mirror_parent_cache, ps); | |
| 3549 md_biodone(pb); | |
| 3550 return; | |
| 3551 } | |
| 3552 | |
| 3553 /* | |
| 3554 * Issue request to change ownership. The call is | |
| 3555 * synchronous so when it returns we can complete the | |
| 3556 * i/o (if successful), or enqueue it again so that | |
| 3557 * the operation will be retried. | |
| 3558 */ | |
| 3559 un->un_owner_state |= MM_MN_OWNER_SENT; | |
| 3560 mutex_exit(&un->un_owner_mx); | |
| 3561 | |
| 3562 msg = kmem_zalloc(sizeof (md_mn_req_owner_t), KM_SLEEP); | |
| 3563 setno = MD_MIN2SET(getminor(pb->b_edev)); | |
| 3564 msg->mnum = MD_SID(un); | |
| 3565 msg->owner = md_mn_mynode_id; | |
| 3566 msg_flags |= MD_MSGF_NO_LOG; | |
| 3567 /* | |
| 3568 * If this IO is triggered by updating a watermark, | |
| 3569 * it might be issued by the creation of a softpartition | |
| 3570 * while the commd subsystem is suspended. | |
| 3571 * We don't want this message to block. | |
| 3572 */ | |
| 3573 if (ps->ps_flags & MD_MPS_WMUPDATE) { | |
| 3574 msg_flags |= MD_MSGF_OVERRIDE_SUSPEND; | |
| 3575 } | |
| 3576 | |
| 3577 kres = kmem_alloc(sizeof (md_mn_kresult_t), KM_SLEEP); | |
| 3578 rval = mdmn_ksend_message(setno, | |
|
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3579 MD_MN_MSG_REQUIRE_OWNER, msg_flags, |
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3580 /* flags */ (char *)msg, |
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3581 sizeof (md_mn_req_owner_t), kres); |
| 0 | 3582 |
| 3583 kmem_free(msg, sizeof (md_mn_req_owner_t)); | |
| 3584 | |
| 3585 if (MDMN_KSEND_MSG_OK(rval, kres)) { | |
| 3586 dq->qlen = 0; | |
| 3587 /* | |
| 3588 * Successfully changed owner, reread the | |
| 3589 * resync record so that we have a valid idea of | |
| 3590 * any previously committed incomplete write()s. | |
| 3591 * NOTE: As we need to acquire the resync mutex | |
| 3592 * this may block, so we defer it to a separate | |
| 3593 * thread handler. This makes us (effectively) | |
| 3594 * non-blocking once the ownership message | |
| 3595 * handling has completed. | |
| 3596 */ | |
| 3597 mutex_enter(&un->un_owner_mx); | |
| 3598 if (un->un_owner_state & MM_MN_BECOME_OWNER) { | |
| 3599 un->un_mirror_owner = md_mn_mynode_id; | |
| 3600 /* Sets owner of un_rr_dirty record */ | |
| 3601 if (un->un_rr_dirty_recid) | |
| 3602 (void) mddb_setowner( | |
| 3603 un->un_rr_dirty_recid, | |
| 3604 md_mn_mynode_id); | |
| 3605 un->un_owner_state &= | |
| 3606 ~MM_MN_BECOME_OWNER; | |
| 3607 /* | |
| 3608 * Release the block on the current | |
| 3609 * resync region if it is blocked | |
| 3610 */ | |
|
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3611 ps1 = un->un_rs_prev_overlap; |
| 0 | 3612 if ((ps1 != NULL) && |
| 3613 (ps1->ps_flags & MD_MPS_ON_OVERLAP)) | |
|
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|
3614 mirror_overlap_tree_remove(ps1); |
| 0 | 3615 mutex_exit(&un->un_owner_mx); |
| 3616 | |
| 3617 /* | |
| 3618 * If we're a read, this must be a | |
| 3619 * resync request, issue | |
| 3620 * the i/o request on the | |
| 3621 * md_mirror_rs_daemon queue. This is | |
| 3622 * to avoid a deadlock between the | |
| 3623 * resync_unit thread and | |
| 3624 * subsequent i/o requests that may | |
| 3625 * block on the resync region. | |
| 3626 */ | |
| 3627 if (pb->b_flags & B_READ) { | |
| 3628 daemon_request( | |
| 3629 &md_mirror_rs_daemon, | |
| 3630 update_resync, dq, REQ_OLD); | |
| 3631 } else { | |
| 3632 daemon_request( | |
| 3633 &md_mirror_io_daemon, | |
| 3634 update_resync, dq, REQ_OLD); | |
| 3635 } | |
| 3636 kmem_free(kres, | |
| 3637 sizeof (md_mn_kresult_t)); | |
| 3638 return; | |
| 3639 } else { | |
| 3640 /* | |
| 3641 * Some other node has beaten us to | |
| 3642 * obtain ownership. We need to | |
| 3643 * reschedule our ownership request | |
| 3644 */ | |
| 3645 mutex_exit(&un->un_owner_mx); | |
| 3646 } | |
| 3647 } else { | |
| 3648 mdmn_ksend_show_error(rval, kres, | |
| 3649 "MD_MN_MSG_REQUIRE_OWNER"); | |
| 3650 /* | |
| 3651 * Message transport failure is handled by the | |
| 3652 * comms layer. If the ownership change request | |
| 3653 * does not succeed we need to flag the error to | |
| 3654 * the initiator of the i/o. This is handled by | |
| 3655 * the retry logic above. As the request failed | |
| 3656 * we do not know _who_ the owner of the mirror | |
| 3657 * currently is. We reset our idea of the owner | |
| 3658 * to None so that any further write()s will | |
| 3659 * attempt to become the owner again. This stops | |
| 3660 * multiple nodes writing to the same mirror | |
| 3661 * simultaneously. | |
| 3662 */ | |
| 3663 mutex_enter(&un->un_owner_mx); | |
| 3664 un->un_owner_state &= | |
| 3665 ~(MM_MN_OWNER_SENT|MM_MN_BECOME_OWNER); | |
| 3666 un->un_mirror_owner = MD_MN_MIRROR_UNOWNED; | |
| 3667 mutex_exit(&un->un_owner_mx); | |
| 3668 } | |
| 3669 kmem_free(kres, sizeof (md_mn_kresult_t)); | |
| 3670 } else | |
| 3671 mutex_exit(&un->un_owner_mx); | |
| 3672 | |
| 3673 /* | |
| 3674 * Re-enqueue this request on the deferred i/o list. Delay the | |
| 3675 * request for md_mirror_owner_to usecs to stop thrashing. | |
| 3676 */ | |
| 3677 (void) timeout(owner_timeout, dq, | |
| 3678 drv_usectohz(md_mirror_owner_to)); | |
| 3679 } | |
| 3680 } | |
| 3681 | |
| 3682 static void | |
| 3683 mirror_write_strategy(buf_t *pb, int flag, void *private) | |
| 3684 { | |
| 3685 md_mps_t *ps; | |
| 3686 md_mcs_t *cs; | |
| 3687 int more; | |
| 3688 mm_unit_t *un; | |
| 3689 mdi_unit_t *ui; | |
| 3690 buf_t *cb; /* child buf pointer */ | |
| 3691 set_t setno; | |
| 3692 int rs_on_overlap = 0; | |
| 3693 | |
| 3694 ui = MDI_UNIT(getminor(pb->b_edev)); | |
| 3695 un = (mm_unit_t *)MD_UNIT(getminor(pb->b_edev)); | |
| 3696 | |
| 3697 | |
| 3698 md_kstat_waitq_enter(ui); | |
| 3699 | |
| 3700 /* | |
| 3701 * If a state change is in progress for this mirror in a MN set, | |
| 3702 * suspend all non-resync writes until the state change is complete. | |
| 3703 * The objective of this suspend is to ensure that it is not | |
| 3704 * possible for one node to read data from a submirror that another node | |
| 3705 * has not written to because of the state change. Therefore we | |
| 3706 * suspend all writes until the state change has been made. As it is | |
| 3707 * not possible to read from the target of a resync, there is no need | |
| 3708 * to suspend resync writes. | |
| 3709 */ | |
| 3710 | |
| 3711 if (!(flag & MD_STR_WAR)) { | |
| 3712 mutex_enter(&un->un_suspend_wr_mx); | |
| 3713 while (un->un_suspend_wr_flag) { | |
| 3714 cv_wait(&un->un_suspend_wr_cv, &un->un_suspend_wr_mx); | |
| 3715 } | |
| 3716 mutex_exit(&un->un_suspend_wr_mx); | |
| 3717 (void) md_unit_readerlock(ui); | |
| 3718 } | |
| 3719 | |
| 3720 if (!(flag & MD_STR_NOTTOP)) { | |
| 3721 if (md_checkbuf(ui, (md_unit_t *)un, pb)) { | |
| 3722 md_kstat_waitq_exit(ui); | |
| 3723 return; | |
| 3724 } | |
| 3725 } | |
| 3726 | |
| 3727 setno = MD_MIN2SET(getminor(pb->b_edev)); | |
| 3728 | |
| 3729 /* If an ABR write has been requested, set MD_STR_ABR flag */ | |
| 3730 if (MD_MNSET_SETNO(setno) && (pb->b_flags & B_ABRWRITE)) | |
| 3731 flag |= MD_STR_ABR; | |
| 3732 | |
| 3733 if (private == NULL) { | |
| 3734 ps = kmem_cache_alloc(mirror_parent_cache, MD_ALLOCFLAGS); | |
| 3735 mirror_parent_init(ps); | |
| 3736 } else { | |
| 3737 ps = private; | |
| 3738 private = NULL; | |
| 3739 } | |
| 3740 if (flag & MD_STR_MAPPED) | |
| 3741 ps->ps_flags |= MD_MPS_MAPPED; | |
| 3742 | |
| 3743 if (flag & MD_STR_WOW) | |
| 3744 ps->ps_flags |= MD_MPS_WOW; | |
| 3745 | |
| 3746 if (flag & MD_STR_ABR) | |
| 3747 ps->ps_flags |= MD_MPS_ABR; | |
| 3748 | |
| 3749 if (flag & MD_STR_WMUPDATE) | |
| 3750 ps->ps_flags |= MD_MPS_WMUPDATE; | |
| 3751 | |
| 3752 /* | |
| 3753 * Save essential information from the original buffhdr | |
| 3754 * in the md_save structure. | |
| 3755 */ | |
| 3756 ps->ps_un = un; | |
| 3757 ps->ps_ui = ui; | |
| 3758 ps->ps_bp = pb; | |
| 3759 ps->ps_addr = pb->b_un.b_addr; | |
| 3760 ps->ps_firstblk = pb->b_lblkno; | |
| 3761 ps->ps_lastblk = pb->b_lblkno + lbtodb(pb->b_bcount) - 1; | |
| 3762 ps->ps_changecnt = un->un_changecnt; | |
| 3763 | |
| 3764 /* | |
| 3765 * If not MN owner and this is an ABR write, make sure the current | |
|
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|
3766 * resync region is in the overlaps tree |
| 0 | 3767 */ |
| 3768 mutex_enter(&un->un_owner_mx); | |
| 3769 if (MD_MNSET_SETNO(setno) && (!(MD_MN_MIRROR_OWNER(un))) && | |
| 3770 ((ui->ui_tstate & MD_ABR_CAP) || (flag & MD_STR_ABR))) { | |
| 3771 md_mps_t *ps1; | |
| 3772 /* Block the current resync region, if not already blocked */ | |
|
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|
3773 ps1 = un->un_rs_prev_overlap; |
| 0 | 3774 |
| 3775 if ((ps1 != NULL) && ((ps1->ps_firstblk != 0) || | |
| 3776 (ps1->ps_lastblk != 0))) { | |
| 3777 /* Drop locks to avoid deadlock */ | |
| 3778 mutex_exit(&un->un_owner_mx); | |
| 3779 md_unit_readerexit(ui); | |
| 3780 wait_for_overlaps(ps1, MD_OVERLAP_ALLOW_REPEAT); | |
| 3781 rs_on_overlap = 1; | |
| 3782 (void) md_unit_readerlock(ui); | |
| 3783 mutex_enter(&un->un_owner_mx); | |
| 3784 /* | |
| 3785 * Check to see if we have obtained ownership | |
| 3786 * while waiting for overlaps. If we have, remove | |
|
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|
3787 * the resync_region entry from the overlap tree |
| 0 | 3788 */ |
| 3789 if (MD_MN_MIRROR_OWNER(un) && | |
| 3790 (ps1->ps_flags & MD_MPS_ON_OVERLAP)) { | |
|
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|
3791 mirror_overlap_tree_remove(ps1); |
| 0 | 3792 rs_on_overlap = 0; |
| 3793 } | |
| 3794 } | |
| 3795 } | |
| 3796 mutex_exit(&un->un_owner_mx); | |
| 3797 | |
| 3798 | |
| 3799 /* | |
| 3800 * following keep write after read from writing to the | |
| 3801 * source in the case where it all came from one place | |
| 3802 */ | |
| 3803 if (flag & MD_STR_WAR) { | |
| 3804 int abort_write = 0; | |
| 3805 /* | |
| 3806 * We are perfoming a write-after-read. This is either as a | |
| 3807 * result of a resync read or as a result of a read in a | |
| 3808 * dirty resync region when the optimized resync is not | |
| 3809 * complete. If in a MN set and a resync generated i/o, | |
| 3810 * if the current block is not in the current | |
| 3811 * resync region terminate the write as another node must have | |
| 3812 * completed this resync region | |
| 3813 */ | |
| 3814 if ((MD_MNSET_SETNO(MD_UN2SET(un))) && | |
| 3815 (!flag & MD_STR_DIRTY_RD)) { | |
| 3816 if (!IN_RESYNC_REGION(un, ps)) | |
| 3817 abort_write = 1; | |
| 3818 } | |
| 3819 if ((select_write_after_read_units(un, ps) == 0) || | |
| 3820 (abort_write)) { | |
| 3821 #ifdef DEBUG | |
| 3822 if (mirror_debug_flag) | |
| 3823 printf("Abort resync write on %x, block %lld\n", | |
| 3824 MD_SID(un), ps->ps_firstblk); | |
| 3825 #endif | |
| 3826 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
3827 mirror_overlap_tree_remove(ps); |
| 0 | 3828 kmem_cache_free(mirror_parent_cache, ps); |
| 3829 md_kstat_waitq_exit(ui); | |
| 3830 md_unit_readerexit(ui); | |
| 3831 md_biodone(pb); | |
| 3832 return; | |
| 3833 } | |
| 3834 } else { | |
| 3835 select_write_units(un, ps); | |
| 3836 | |
| 3837 /* Drop readerlock to avoid deadlock */ | |
| 3838 md_unit_readerexit(ui); | |
| 3839 wait_for_overlaps(ps, MD_OVERLAP_NO_REPEAT); | |
| 3840 un = md_unit_readerlock(ui); | |
| 3841 /* | |
| 3842 * For a MN set with an ABR write, if we are now the | |
|
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|
3843 * owner and we have a resync region in the overlap |
|
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|
3844 * tree, remove the entry from overlaps and retry the write. |
| 0 | 3845 */ |
| 3846 | |
| 3847 if (MD_MNSET_SETNO(setno) && | |
| 3848 ((ui->ui_tstate & MD_ABR_CAP) || (flag & MD_STR_ABR))) { | |
| 3849 mutex_enter(&un->un_owner_mx); | |
| 3850 if (((MD_MN_MIRROR_OWNER(un))) && rs_on_overlap) { | |
|
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|
3851 mirror_overlap_tree_remove(ps); |
| 0 | 3852 md_kstat_waitq_exit(ui); |
| 3853 mutex_exit(&un->un_owner_mx); | |
| 3854 md_unit_readerexit(ui); | |
| 3855 daemon_request(&md_mirror_daemon, daemon_io, | |
| 3856 (daemon_queue_t *)ps, REQ_OLD); | |
| 3857 return; | |
| 3858 } | |
| 3859 mutex_exit(&un->un_owner_mx); | |
| 3860 } | |
| 3861 } | |
| 3862 | |
| 3863 /* | |
| 3864 * For Multinode mirrors with a Resync Region (not ABR) we need to | |
| 3865 * become the mirror owner before continuing with the write(). For ABR | |
| 3866 * mirrors we check that we 'own' the resync if we're in | |
| 3867 * write-after-read mode. We do this _after_ ensuring that there are no | |
| 3868 * overlaps to ensure that the once we know that we are the owner, the | |
| 3869 * readerlock will not released until the write is complete. As a | |
| 3870 * change of ownership in a MN set requires the writerlock, this | |
| 3871 * ensures that ownership cannot be changed until the write is | |
| 3872 * complete | |
| 3873 */ | |
| 3874 if (MD_MNSET_SETNO(setno) && (!((ui->ui_tstate & MD_ABR_CAP) || | |
| 3875 (flag & MD_STR_ABR)) || (flag & MD_STR_WAR))) { | |
| 3876 if (!MD_MN_MIRROR_OWNER(un)) { | |
| 3877 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
3878 mirror_overlap_tree_remove(ps); |
| 0 | 3879 md_kstat_waitq_exit(ui); |
| 3880 ASSERT(!(flag & MD_STR_WAR)); | |
| 3881 md_unit_readerexit(ui); | |
| 3882 daemon_request(&md_mirror_daemon, become_owner, | |
| 3883 (daemon_queue_t *)ps, REQ_OLD); | |
| 3884 return; | |
| 3885 } | |
| 3886 } | |
| 3887 | |
| 3888 /* | |
| 3889 * Mark resync region if mirror has a Resync Region _and_ we are not | |
| 3890 * a resync initiated write(). Don't mark region if we're flagged as | |
| 3891 * an ABR write. | |
| 3892 */ | |
| 3893 if (!((ui->ui_tstate & MD_ABR_CAP) || (flag & MD_STR_ABR)) && | |
| 3894 !(flag & MD_STR_WAR)) { | |
| 3895 if (mirror_mark_resync_region(un, ps->ps_firstblk, | |
| 3896 ps->ps_lastblk)) { | |
| 3897 pb->b_flags |= B_ERROR; | |
| 3898 pb->b_resid = pb->b_bcount; | |
| 3899 ASSERT(!(ps->ps_flags & MD_MPS_ON_OVERLAP)); | |
| 3900 kmem_cache_free(mirror_parent_cache, ps); | |
| 3901 md_kstat_waitq_exit(ui); | |
| 3902 md_unit_readerexit(ui); | |
| 3903 md_biodone(pb); | |
| 3904 return; | |
| 3905 } | |
| 3906 } | |
| 3907 | |
| 3908 ps->ps_childbflags = pb->b_flags | B_WRITE; | |
| 3909 ps->ps_childbflags &= ~B_READ; | |
| 3910 if (flag & MD_STR_MAPPED) | |
| 3911 ps->ps_childbflags &= ~B_PAGEIO; | |
| 3912 | |
| 3913 if (!(flag & MD_STR_NOTTOP) && panicstr) | |
| 3914 /* Disable WOW and don't free ps */ | |
| 3915 ps->ps_flags |= (MD_MPS_WOW|MD_MPS_DONTFREE); | |
| 3916 | |
| 3917 md_kstat_waitq_to_runq(ui); | |
| 3918 | |
| 3919 /* | |
| 3920 * Treat Raw and Direct I/O as Write-on-Write always | |
| 3921 */ | |
| 3922 | |
| 3923 if (!(md_mirror_wow_flg & WOW_DISABLE) && | |
| 3924 (md_mirror_wow_flg & WOW_PHYS_ENABLE) && | |
| 3925 (pb->b_flags & B_PHYS) && | |
| 3926 !(ps->ps_flags & MD_MPS_WOW)) { | |
| 3927 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
3928 mirror_overlap_tree_remove(ps); |
| 0 | 3929 md_unit_readerexit(ui); |
| 3930 daemon_request(&md_mstr_daemon, handle_wow, | |
|
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|
3931 (daemon_queue_t *)ps, REQ_OLD); |
| 0 | 3932 return; |
| 3933 } | |
| 3934 | |
| 3935 ps->ps_frags = 1; | |
| 3936 do { | |
| 3937 cs = kmem_cache_alloc(mirror_child_cache, MD_ALLOCFLAGS); | |
| 3938 mirror_child_init(cs); | |
| 3939 cb = &cs->cs_buf; | |
| 3940 more = mirror_map_write(un, cs, ps, (flag & MD_STR_WAR)); | |
| 3941 | |
| 3942 /* | |
| 3943 * This handles the case where we're requesting | |
| 3944 * a write to block 0 on a label partition. (more < 0) | |
| 3945 * means that the request size was smaller than the | |
| 3946 * size of the label. If so this request is done. | |
| 3947 */ | |
| 3948 if (more < 0) { | |
| 3949 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
3950 mirror_overlap_tree_remove(ps); |
| 0 | 3951 md_kstat_runq_exit(ui); |
| 3952 kmem_cache_free(mirror_child_cache, cs); | |
| 3953 kmem_cache_free(mirror_parent_cache, ps); | |
| 3954 md_unit_readerexit(ui); | |
| 3955 md_biodone(pb); | |
| 3956 return; | |
| 3957 } | |
| 3958 if (more) { | |
| 3959 mutex_enter(&ps->ps_mx); | |
| 3960 ps->ps_frags++; | |
| 3961 mutex_exit(&ps->ps_mx); | |
| 3962 } | |
| 3963 md_call_strategy(cb, flag, private); | |
| 3964 } while (more); | |
| 3965 | |
| 3966 if (!(flag & MD_STR_NOTTOP) && panicstr) { | |
| 3967 while (!(ps->ps_flags & MD_MPS_DONE)) { | |
| 3968 md_daemon(1, &md_done_daemon); | |
| 3969 drv_usecwait(10); | |
| 3970 } | |
| 3971 kmem_cache_free(mirror_parent_cache, ps); | |
| 3972 } | |
| 3973 } | |
| 3974 | |
| 3975 static void | |
| 3976 mirror_read_strategy(buf_t *pb, int flag, void *private) | |
| 3977 { | |
| 3978 md_mps_t *ps; | |
| 3979 md_mcs_t *cs; | |
| 3980 size_t more; | |
| 3981 mm_unit_t *un; | |
| 3982 mdi_unit_t *ui; | |
| 3983 size_t current_count; | |
| 3984 diskaddr_t current_blkno; | |
| 3985 off_t current_offset; | |
| 3986 buf_t *cb; /* child buf pointer */ | |
| 3987 set_t setno; | |
| 3988 | |
| 3989 ui = MDI_UNIT(getminor(pb->b_edev)); | |
| 3990 | |
| 3991 md_kstat_waitq_enter(ui); | |
| 3992 | |
| 3993 un = (mm_unit_t *)md_unit_readerlock(ui); | |
| 3994 | |
| 3995 if (!(flag & MD_STR_NOTTOP)) { | |
| 3996 if (md_checkbuf(ui, (md_unit_t *)un, pb)) { | |
| 3997 md_kstat_waitq_exit(ui); | |
| 3998 return; | |
| 3999 } | |
| 4000 } | |
| 4001 | |
| 4002 if (private == NULL) { | |
| 4003 ps = kmem_cache_alloc(mirror_parent_cache, MD_ALLOCFLAGS); | |
| 4004 mirror_parent_init(ps); | |
| 4005 } else { | |
| 4006 ps = private; | |
| 4007 private = NULL; | |
| 4008 } | |
| 4009 | |
| 4010 if (flag & MD_STR_MAPPED) | |
| 4011 ps->ps_flags |= MD_MPS_MAPPED; | |
| 4012 if (flag & MD_NOBLOCK) | |
| 4013 ps->ps_flags |= MD_MPS_NOBLOCK; | |
| 4014 if (flag & MD_STR_WMUPDATE) | |
| 4015 ps->ps_flags |= MD_MPS_WMUPDATE; | |
| 4016 | |
| 4017 /* | |
| 4018 * Check to see if this is a DMR driven read. If so we need to use the | |
| 4019 * specified side (in un->un_dmr_last_read) for the source of the data. | |
| 4020 */ | |
| 4021 if (flag & MD_STR_DMR) | |
| 4022 ps->ps_flags |= MD_MPS_DMR; | |
| 4023 | |
| 4024 /* | |
| 4025 * Save essential information from the original buffhdr | |
| 4026 * in the md_save structure. | |
| 4027 */ | |
| 4028 ps->ps_un = un; | |
| 4029 ps->ps_ui = ui; | |
| 4030 ps->ps_bp = pb; | |
| 4031 ps->ps_addr = pb->b_un.b_addr; | |
| 4032 ps->ps_firstblk = pb->b_lblkno; | |
| 4033 ps->ps_lastblk = pb->b_lblkno + lbtodb(pb->b_bcount) - 1; | |
| 4034 ps->ps_changecnt = un->un_changecnt; | |
| 4035 | |
| 4036 current_count = btodb(pb->b_bcount); | |
| 4037 current_blkno = pb->b_lblkno; | |
| 4038 current_offset = 0; | |
| 4039 | |
| 4040 /* | |
| 4041 * If flag has MD_STR_WAR set this means that the read is issued by a | |
| 4042 * resync thread which may or may not be an optimised resync. | |
| 4043 * | |
| 4044 * If MD_UN_OPT_NOT_DONE is set this means that the optimized resync | |
| 4045 * code has not completed; either a resync has not started since snarf, | |
| 4046 * or there is an optimized resync in progress. | |
| 4047 * | |
| 4048 * We need to generate a write after this read in the following two | |
| 4049 * cases, | |
| 4050 * | |
| 4051 * 1. Any Resync-Generated read | |
| 4052 * | |
| 4053 * 2. Any read to a DIRTY REGION if there is an optimized resync | |
| 4054 * pending or in progress. | |
| 4055 * | |
| 4056 * The write after read is done in these cases to ensure that all sides | |
| 4057 * of the mirror are in sync with the read data and that it is not | |
| 4058 * possible for an application to read the same block multiple times | |
| 4059 * and get different data. | |
| 4060 * | |
| 4061 * This would be possible if the block was in a dirty region. | |
| 4062 * | |
| 4063 * If we're performing a directed read we don't write the data out as | |
| 4064 * the application is responsible for restoring the mirror to a known | |
| 4065 * state. | |
| 4066 */ | |
| 4067 if (((MD_STATUS(un) & MD_UN_OPT_NOT_DONE) || (flag & MD_STR_WAR)) && | |
| 4068 !(flag & MD_STR_DMR)) { | |
| 4069 size_t start_rr, i, end_rr; | |
| 4070 int region_dirty = 1; | |
| 4071 | |
| 4072 /* | |
| 4073 * We enter here under three circumstances, | |
| 4074 * | |
| 4075 * MD_UN_OPT_NOT_DONE MD_STR_WAR | |
| 4076 * 0 1 | |
| 4077 * 1 0 | |
| 4078 * 1 1 | |
| 4079 * | |
| 4080 * To be optimal we only care to explicitly check for dirty | |
| 4081 * regions in the second case since if MD_STR_WAR is set we | |
| 4082 * always do the write after read. | |
| 4083 */ | |
| 4084 if (!(flag & MD_STR_WAR)) { | |
| 4085 BLK_TO_RR(end_rr, ps->ps_lastblk, un); | |
| 4086 BLK_TO_RR(start_rr, ps->ps_firstblk, un); | |
| 4087 | |
| 4088 for (i = start_rr; i <= end_rr; i++) | |
| 4089 if ((region_dirty = IS_KEEPDIRTY(i, un)) != 0) | |
| 4090 break; | |
| 4091 } | |
| 4092 | |
| 4093 if ((region_dirty) && | |
| 4094 !(md_get_setstatus(MD_UN2SET(un)) & MD_SET_STALE)) { | |
| 4095 ps->ps_call = write_after_read; | |
| 4096 /* | |
| 4097 * Mark this as a RESYNC_READ in ps_flags. | |
| 4098 * This is used if the read fails during a | |
| 4099 * resync of a 3-way mirror to ensure that | |
| 4100 * the retried read to the remaining | |
| 4101 * good submirror has MD_STR_WAR set. This | |
| 4102 * is needed to ensure that the resync write | |
| 4103 * (write-after-read) takes place. | |
| 4104 */ | |
| 4105 ps->ps_flags |= MD_MPS_RESYNC_READ; | |
| 4106 | |
| 4107 /* | |
| 4108 * If MD_STR_FLAG_ERR is set in the flags we | |
| 4109 * set MD_MPS_FLAG_ERROR so that an error on the resync | |
| 4110 * write (issued by write_after_read) will be flagged | |
| 4111 * to the biowait'ing resync thread. This allows us to | |
| 4112 * avoid issuing further resync requests to a device | |
| 4113 * that has had a write failure. | |
| 4114 */ | |
| 4115 if (flag & MD_STR_FLAG_ERR) | |
| 4116 ps->ps_flags |= MD_MPS_FLAG_ERROR; | |
| 4117 | |
| 4118 setno = MD_UN2SET(un); | |
| 4119 /* | |
| 4120 * Drop the readerlock to avoid | |
| 4121 * deadlock | |
| 4122 */ | |
| 4123 md_unit_readerexit(ui); | |
| 4124 wait_for_overlaps(ps, MD_OVERLAP_NO_REPEAT); | |
| 4125 un = md_unit_readerlock(ui); | |
| 4126 /* | |
| 4127 * Ensure that we are owner | |
| 4128 */ | |
| 4129 if (MD_MNSET_SETNO(setno)) { | |
| 4130 /* | |
| 4131 * For a non-resync read that requires a | |
| 4132 * write-after-read to be done, set a flag | |
| 4133 * in the parent structure, so that the | |
| 4134 * write_strategy routine can omit the | |
| 4135 * test that the write is still within the | |
| 4136 * resync region | |
| 4137 */ | |
| 4138 if (!(flag & MD_STR_WAR)) | |
| 4139 ps->ps_flags |= MD_MPS_DIRTY_RD; | |
| 4140 | |
| 4141 /* | |
| 4142 * Before reading the buffer, see if | |
| 4143 * we are the owner | |
| 4144 */ | |
| 4145 if (!MD_MN_MIRROR_OWNER(un)) { | |
| 4146 ps->ps_call = NULL; | |
|
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diff
changeset
|
4147 mirror_overlap_tree_remove(ps); |
| 0 | 4148 md_kstat_waitq_exit(ui); |
| 4149 md_unit_readerexit(ui); | |
| 4150 daemon_request( | |
| 4151 &md_mirror_daemon, | |
| 4152 become_owner, | |
| 4153 (daemon_queue_t *)ps, | |
| 4154 REQ_OLD); | |
| 4155 return; | |
| 4156 } | |
| 4157 /* | |
| 4158 * For a resync read, check to see if I/O is | |
| 4159 * outside of the current resync region, or | |
| 4160 * the resync has finished. If so | |
| 4161 * just terminate the I/O | |
| 4162 */ | |
| 4163 if ((flag & MD_STR_WAR) && | |
| 4164 (!(un->c.un_status & MD_UN_WAR) || | |
| 4165 (!IN_RESYNC_REGION(un, ps)))) { | |
| 4166 #ifdef DEBUG | |
| 4167 if (mirror_debug_flag) | |
| 4168 printf("Abort resync read " | |
| 4169 "%x: %lld\n", | |
| 4170 MD_SID(un), | |
| 4171 ps->ps_firstblk); | |
| 4172 #endif | |
|
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|
4173 mirror_overlap_tree_remove(ps); |
| 0 | 4174 kmem_cache_free(mirror_parent_cache, |
| 4175 ps); | |
| 4176 md_kstat_waitq_exit(ui); | |
| 4177 md_unit_readerexit(ui); | |
| 4178 md_biodone(pb); | |
| 4179 return; | |
| 4180 } | |
| 4181 } | |
| 4182 } | |
| 4183 } | |
| 4184 | |
| 4185 if (flag & MD_STR_DMR) { | |
| 4186 ps->ps_call = directed_read_done; | |
| 4187 } | |
| 4188 | |
| 4189 if (!(flag & MD_STR_NOTTOP) && panicstr) | |
| 4190 ps->ps_flags |= MD_MPS_DONTFREE; | |
| 4191 | |
| 4192 md_kstat_waitq_to_runq(ui); | |
| 4193 | |
| 4194 ps->ps_frags++; | |
| 4195 do { | |
| 4196 cs = kmem_cache_alloc(mirror_child_cache, MD_ALLOCFLAGS); | |
| 4197 mirror_child_init(cs); | |
| 4198 cb = &cs->cs_buf; | |
| 4199 cs->cs_ps = ps; | |
| 4200 | |
| 4201 cb = md_bioclone(pb, current_offset, current_count, NODEV, | |
| 4202 current_blkno, mirror_done, cb, KM_NOSLEEP); | |
| 4203 | |
| 4204 more = mirror_map_read(ps, cs, current_blkno, | |
|
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|
4205 (u_longlong_t)current_count); |
| 0 | 4206 if (more) { |
| 4207 mutex_enter(&ps->ps_mx); | |
| 4208 ps->ps_frags++; | |
| 4209 mutex_exit(&ps->ps_mx); | |
| 4210 } | |
| 4211 | |
| 4212 /* | |
| 4213 * Do these calculations now, | |
| 4214 * so that we pickup a valid b_bcount from the chld_bp. | |
| 4215 */ | |
| 4216 current_count -= more; | |
| 4217 current_offset += cb->b_bcount; | |
| 4218 current_blkno += more; | |
| 4219 md_call_strategy(cb, flag, private); | |
| 4220 } while (more); | |
| 4221 | |
| 4222 if (!(flag & MD_STR_NOTTOP) && panicstr) { | |
| 4223 while (!(ps->ps_flags & MD_MPS_DONE)) { | |
| 4224 md_daemon(1, &md_done_daemon); | |
| 4225 drv_usecwait(10); | |
| 4226 } | |
| 4227 kmem_cache_free(mirror_parent_cache, ps); | |
| 4228 } | |
| 4229 } | |
| 4230 | |
| 4231 void | |
| 4232 md_mirror_strategy(buf_t *bp, int flag, void *private) | |
| 4233 { | |
| 4234 set_t setno = MD_MIN2SET(getminor(bp->b_edev)); | |
| 4235 | |
| 4236 /* | |
| 4237 * When doing IO to a multi owner meta device, check if set is halted. | |
| 4238 * We do this check without the needed lock held, for performance | |
| 4239 * reasons. | |
| 4240 * If an IO just slips through while the set is locked via an | |
| 4241 * MD_MN_SUSPEND_SET, we don't care about it. | |
| 4242 * Only check for suspension if we are a top-level i/o request | |
| 4243 * (MD_STR_NOTTOP is cleared in 'flag'). | |
| 4244 */ | |
| 4245 if ((md_set[setno].s_status & (MD_SET_HALTED | MD_SET_MNSET)) == | |
| 4246 (MD_SET_HALTED | MD_SET_MNSET)) { | |
| 4247 if ((flag & MD_STR_NOTTOP) == 0) { | |
| 4248 mutex_enter(&md_mx); | |
| 4249 /* Here we loop until the set is no longer halted */ | |
| 4250 while (md_set[setno].s_status & MD_SET_HALTED) { | |
| 4251 cv_wait(&md_cv, &md_mx); | |
| 4252 } | |
| 4253 mutex_exit(&md_mx); | |
| 4254 } | |
| 4255 } | |
| 4256 | |
| 4257 if ((flag & MD_IO_COUNTED) == 0) { | |
| 4258 if ((flag & MD_NOBLOCK) == 0) { | |
| 4259 if (md_inc_iocount(setno) != 0) { | |
| 4260 bp->b_flags |= B_ERROR; | |
| 4261 bp->b_error = ENXIO; | |
| 4262 bp->b_resid = bp->b_bcount; | |
| 4263 biodone(bp); | |
| 4264 return; | |
| 4265 } | |
| 4266 } else { | |
| 4267 md_inc_iocount_noblock(setno); | |
| 4268 } | |
| 4269 } | |
| 4270 | |
| 4271 if (bp->b_flags & B_READ) | |
| 4272 mirror_read_strategy(bp, flag, private); | |
| 4273 else | |
| 4274 mirror_write_strategy(bp, flag, private); | |
| 4275 } | |
| 4276 | |
| 4277 /* | |
| 4278 * mirror_directed_read: | |
| 4279 * -------------------- | |
| 4280 * Entry-point for the DKIOCDMR ioctl. We issue a read to a specified sub-mirror | |
| 4281 * so that the application can determine what (if any) resync needs to be | |
| 4282 * performed. The data is copied out to the user-supplied buffer. | |
| 4283 * | |
| 4284 * Parameters: | |
| 4285 * mdev - dev_t for the mirror device | |
| 4286 * vdr - directed read parameters specifying location and submirror | |
| 4287 * to perform the read from | |
| 4288 * mode - used to ddi_copyout() any resulting data from the read | |
| 4289 * | |
| 4290 * Returns: | |
| 4291 * 0 success | |
| 4292 * !0 error code | |
| 4293 * EINVAL - invalid request format | |
| 4294 */ | |
| 4295 int | |
| 4296 mirror_directed_read(dev_t mdev, vol_directed_rd_t *vdr, int mode) | |
| 4297 { | |
| 4298 buf_t *bp; | |
| 4299 minor_t mnum = getminor(mdev); | |
| 4300 mdi_unit_t *ui = MDI_UNIT(mnum); | |
| 4301 mm_unit_t *un; | |
| 4302 mm_submirror_t *sm; | |
| 4303 char *sm_nm; | |
| 4304 uint_t next_side; | |
| 4305 void *kbuffer; | |
| 4306 | |
| 4307 if (ui == NULL) | |
| 4308 return (ENXIO); | |
| 4309 | |
| 4310 if (!(vdr->vdr_flags & DKV_DMR_NEXT_SIDE)) { | |
| 4311 return (EINVAL); | |
| 4312 } | |
| 4313 | |
| 4314 /* Check for aligned block access. We disallow non-aligned requests. */ | |
| 4315 if (vdr->vdr_offset % DEV_BSIZE) { | |
| 4316 return (EINVAL); | |
| 4317 } | |
| 4318 | |
| 4319 /* | |
| 4320 * Allocate kernel buffer for target of read(). If we had a reliable | |
| 4321 * (sorry functional) DDI this wouldn't be needed. | |
| 4322 */ | |
| 4323 kbuffer = kmem_alloc(vdr->vdr_nbytes, KM_NOSLEEP); | |
| 4324 if (kbuffer == NULL) { | |
| 4325 cmn_err(CE_WARN, "mirror_directed_read: couldn't allocate %lx" | |
| 4326 " bytes\n", vdr->vdr_nbytes); | |
| 4327 return (ENOMEM); | |
| 4328 } | |
| 4329 | |
| 4330 bp = getrbuf(KM_SLEEP); | |
| 4331 | |
| 4332 bp->b_un.b_addr = kbuffer; | |
| 4333 bp->b_flags = B_READ; | |
| 4334 bp->b_bcount = vdr->vdr_nbytes; | |
| 4335 bp->b_lblkno = lbtodb(vdr->vdr_offset); | |
| 4336 bp->b_edev = mdev; | |
| 4337 | |
| 4338 un = md_unit_readerlock(ui); | |
| 4339 | |
| 4340 /* | |
| 4341 * If DKV_SIDE_INIT is set we need to determine the first available | |
| 4342 * side to start reading from. If it isn't set we increment to the | |
| 4343 * next readable submirror. | |
| 4344 * If there are no readable submirrors we error out with DKV_DMR_ERROR. | |
| 4345 * Note: we check for a readable submirror on completion of the i/o so | |
| 4346 * we should _always_ have one available. If this becomes unavailable | |
| 4347 * we have missed the 'DKV_DMR_DONE' opportunity. This could happen if | |
| 4348 * a metadetach is made between the completion of one DKIOCDMR ioctl | |
| 4349 * and the start of the next (i.e. a sys-admin 'accident' occurred). | |
| 4350 * The chance of this is small, but not non-existent. | |
| 4351 */ | |
| 4352 if (vdr->vdr_side == DKV_SIDE_INIT) { | |
| 4353 next_side = 0; | |
| 4354 } else { | |
| 4355 next_side = vdr->vdr_side + 1; | |
| 4356 } | |
| 4357 while ((next_side < NMIRROR) && | |
| 4358 !SUBMIRROR_IS_READABLE(un, next_side)) | |
| 4359 next_side++; | |
| 4360 if (next_side >= NMIRROR) { | |
| 4361 vdr->vdr_flags |= DKV_DMR_ERROR; | |
| 4362 freerbuf(bp); | |
| 4363 vdr->vdr_bytesread = 0; | |
| 4364 md_unit_readerexit(ui); | |
| 4365 return (0); | |
| 4366 } | |
| 4367 | |
| 4368 /* Set the side to read from */ | |
| 4369 un->un_dmr_last_read = next_side; | |
| 4370 | |
| 4371 md_unit_readerexit(ui); | |
| 4372 | |
| 4373 /* | |
| 4374 * Save timestamp for verification purposes. Can be read by debugger | |
| 4375 * to verify that this ioctl has been executed and to find the number | |
| 4376 * of DMR reads and the time of the last DMR read. | |
| 4377 */ | |
| 4378 uniqtime(&mirror_dmr_stats.dmr_timestamp); | |
| 4379 mirror_dmr_stats.dmr_count++; | |
| 4380 | |
| 4381 /* Issue READ request and wait for completion */ | |
| 4382 mirror_read_strategy(bp, MD_STR_DMR|MD_NOBLOCK|MD_STR_NOTTOP, NULL); | |
| 4383 | |
| 4384 mutex_enter(&un->un_dmr_mx); | |
| 4385 cv_wait(&un->un_dmr_cv, &un->un_dmr_mx); | |
| 4386 mutex_exit(&un->un_dmr_mx); | |
| 4387 | |
| 4388 /* | |
| 4389 * Check to see if we encountered an error during the read. If so we | |
| 4390 * can make no guarantee about any possibly returned data. | |
| 4391 */ | |
| 4392 if ((bp->b_flags & B_ERROR) == 0) { | |
| 4393 vdr->vdr_flags &= ~DKV_DMR_ERROR; | |
| 4394 if (bp->b_resid) { | |
| 4395 vdr->vdr_flags |= DKV_DMR_SHORT; | |
| 4396 vdr->vdr_bytesread = vdr->vdr_nbytes - bp->b_resid; | |
| 4397 } else { | |
| 4398 vdr->vdr_flags |= DKV_DMR_SUCCESS; | |
| 4399 vdr->vdr_bytesread = vdr->vdr_nbytes; | |
| 4400 } | |
| 4401 /* Copy the data read back out to the user supplied buffer */ | |
| 4402 if (ddi_copyout(kbuffer, vdr->vdr_data, vdr->vdr_bytesread, | |
| 4403 mode)) { | |
| 4404 kmem_free(kbuffer, vdr->vdr_nbytes); | |
| 4405 return (EFAULT); | |
| 4406 } | |
| 4407 | |
| 4408 } else { | |
| 4409 /* Error out with DKV_DMR_ERROR */ | |
| 4410 vdr->vdr_flags |= DKV_DMR_ERROR; | |
| 4411 vdr->vdr_flags &= ~(DKV_DMR_SUCCESS|DKV_DMR_SHORT|DKV_DMR_DONE); | |
| 4412 } | |
| 4413 /* | |
| 4414 * Update the DMR parameters with the side and name of submirror that | |
| 4415 * we have just read from (un->un_dmr_last_read) | |
| 4416 */ | |
| 4417 un = md_unit_readerlock(ui); | |
| 4418 | |
| 4419 vdr->vdr_side = un->un_dmr_last_read; | |
| 4420 sm = &un->un_sm[un->un_dmr_last_read]; | |
| 4421 sm_nm = md_shortname(md_getminor(sm->sm_dev)); | |
| 4422 | |
|
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diff
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|
4423 (void) strncpy(vdr->vdr_side_name, sm_nm, sizeof (vdr->vdr_side_name)); |
| 0 | 4424 |
| 4425 /* | |
| 4426 * Determine if we've completed the read cycle. This is true iff the | |
| 4427 * next computed submirror (side) equals or exceeds NMIRROR. We cannot | |
| 4428 * use un_nsm as we need to handle a sparse array of submirrors (which | |
| 4429 * can occur if a submirror is metadetached). | |
| 4430 */ | |
| 4431 next_side = un->un_dmr_last_read + 1; | |
| 4432 while ((next_side < NMIRROR) && | |
| 4433 !SUBMIRROR_IS_READABLE(un, next_side)) | |
| 4434 next_side++; | |
| 4435 if (next_side >= NMIRROR) { | |
| 4436 /* We've finished */ | |
| 4437 vdr->vdr_flags |= DKV_DMR_DONE; | |
| 4438 } | |
| 4439 | |
| 4440 md_unit_readerexit(ui); | |
| 4441 freerbuf(bp); | |
| 4442 kmem_free(kbuffer, vdr->vdr_nbytes); | |
| 4443 | |
| 4444 return (0); | |
| 4445 } | |
| 4446 | |
| 4447 /* | |
| 4448 * mirror_resync_message: | |
| 4449 * --------------------- | |
| 4450 * Handle the multi-node resync messages that keep all nodes within a given | |
| 4451 * disk-set in sync with their view of a mirror's resync status. | |
| 4452 * | |
| 4453 * The message types dealt with are: | |
| 4454 * MD_MN_MSG_RESYNC_STARTING - start a resync thread for a unit | |
| 4455 * MD_MN_MSG_RESYNC_NEXT - specified next region to be resynced | |
| 4456 * MD_MN_MSG_RESYNC_FINISH - stop the resync thread for a unit | |
| 4457 * MD_MN_MSG_RESYNC_PHASE_DONE - end of a resync phase, opt, submirror or comp | |
| 4458 * | |
| 4459 * Returns: | |
| 4460 * 0 Success | |
| 4461 * >0 Failure error number | |
| 4462 */ | |
| 4463 int | |
| 4464 mirror_resync_message(md_mn_rs_params_t *p, IOLOCK *lockp) | |
| 4465 { | |
| 4466 mdi_unit_t *ui; | |
| 4467 mm_unit_t *un; | |
| 4468 set_t setno; | |
| 4469 int is_ABR; | |
| 4470 int smi; | |
| 4471 int ci; | |
| 4472 sm_state_t state; | |
| 4473 int broke_out; | |
| 4474 mm_submirror_t *sm; | |
| 4475 mm_submirror_ic_t *smic; | |
| 4476 md_m_shared_t *shared; | |
| 4477 md_error_t mde = mdnullerror; | |
| 4478 md_mps_t *ps; | |
| 4479 int rs_active; | |
| 4480 | |
| 4481 /* Check that the given device is part of a multi-node set */ | |
| 4482 setno = MD_MIN2SET(p->mnum); | |
| 4483 if (setno >= md_nsets) { | |
| 4484 return (ENXIO); | |
| 4485 } | |
| 4486 if (!MD_MNSET_SETNO(setno)) { | |
| 4487 return (EINVAL); | |
| 4488 } | |
| 4489 | |
| 4490 if ((un = mirror_getun(p->mnum, &p->mde, NO_LOCK, NULL)) == NULL) | |
| 4491 return (EINVAL); | |
| 4492 if ((ui = MDI_UNIT(p->mnum)) == NULL) | |
| 4493 return (EINVAL); | |
| 4494 is_ABR = (ui->ui_tstate & MD_ABR_CAP); | |
| 4495 | |
| 4496 /* Obtain the current resync status */ | |
| 4497 (void) md_ioctl_readerlock(lockp, ui); | |
| 4498 rs_active = (MD_STATUS(un) & MD_UN_RESYNC_ACTIVE) ? 1 : 0; | |
| 4499 md_ioctl_readerexit(lockp); | |
| 4500 | |
| 4501 switch ((md_mn_msgtype_t)p->msg_type) { | |
| 4502 case MD_MN_MSG_RESYNC_STARTING: | |
| 4503 /* Start the resync thread for the mirror */ | |
| 4504 (void) mirror_resync_unit(p->mnum, NULL, &p->mde, lockp); | |
| 4505 break; | |
| 4506 | |
| 4507 case MD_MN_MSG_RESYNC_NEXT: | |
| 4508 /* | |
| 4509 * We have to release any previously marked overlap regions | |
| 4510 * so that i/o can resume. Then we need to block the region | |
| 4511 * from [rs_start..rs_start+rs_size) * so that no i/o is issued. | |
| 4512 * Update un_rs_resync_done and un_rs_resync_2_do. | |
| 4513 */ | |
| 4514 (void) md_ioctl_readerlock(lockp, ui); | |
| 4515 /* | |
| 4516 * Ignore the message if there is no active resync thread or | |
| 4517 * if it is for a resync type that we have already completed. | |
| 4518 * un_resync_completed is set to the last resync completed | |
| 4519 * when processing a PHASE_DONE message. | |
| 4520 */ | |
| 4521 if (!rs_active || (p->rs_type == un->un_resync_completed)) | |
| 4522 break; | |
| 4523 /* | |
| 4524 * If this message is for the same resync and is for an earlier | |
| 4525 * resync region, just ignore it. This can only occur if this | |
| 4526 * node has progressed on to the next resync region before | |
| 4527 * we receive this message. This can occur if the class for | |
| 4528 * this message is busy and the originator has to retry thus | |
| 4529 * allowing this node to move onto the next resync_region. | |
| 4530 */ | |
| 4531 if ((p->rs_type == un->un_rs_type) && | |
| 4532 (p->rs_start < un->un_resync_startbl)) | |
| 4533 break; | |
|
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4932
diff
changeset
|
4534 ps = un->un_rs_prev_overlap; |
| 0 | 4535 |
| 4536 /* Allocate previous overlap reference if needed */ | |
| 4537 if (ps == NULL) { | |
| 4538 ps = kmem_cache_alloc(mirror_parent_cache, | |
|
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|
4539 MD_ALLOCFLAGS); |
| 0 | 4540 ps->ps_un = un; |
| 4541 ps->ps_ui = ui; | |
| 4542 ps->ps_firstblk = 0; | |
| 4543 ps->ps_lastblk = 0; | |
| 4544 ps->ps_flags = 0; | |
| 4545 md_ioctl_readerexit(lockp); | |
| 4546 (void) md_ioctl_writerlock(lockp, ui); | |
|
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4932
diff
changeset
|
4547 un->un_rs_prev_overlap = ps; |
| 0 | 4548 md_ioctl_writerexit(lockp); |
| 4549 } else | |
| 4550 md_ioctl_readerexit(lockp); | |
| 4551 | |
| 4552 if (p->rs_originator != md_mn_mynode_id) { | |
| 4553 /* | |
| 4554 * On all but the originating node, first update | |
| 4555 * the resync state, then unblock the previous | |
| 4556 * region and block the next one. No need | |
| 4557 * to do this if the region is already blocked. | |
| 4558 * Update the submirror state and flags from the | |
| 4559 * originator. This keeps the cluster in sync with | |
| 4560 * regards to the resync status. | |
| 4561 */ | |
| 4562 | |
| 4563 (void) md_ioctl_writerlock(lockp, ui); | |
| 4564 un->un_rs_resync_done = p->rs_done; | |
| 4565 un->un_rs_resync_2_do = p->rs_2_do; | |
| 4566 un->un_rs_type = p->rs_type; | |
| 4567 un->un_resync_startbl = p->rs_start; | |
| 4568 md_ioctl_writerexit(lockp); | |
| 4569 /* | |
| 4570 * Use un_owner_mx to ensure that an ownership change | |
| 4571 * cannot happen at the same time as this message | |
| 4572 */ | |
| 4573 mutex_enter(&un->un_owner_mx); | |
| 4574 if (MD_MN_MIRROR_OWNER(un)) { | |
| 4575 ps->ps_firstblk = p->rs_start; | |
| 4576 ps->ps_lastblk = ps->ps_firstblk + | |
| 4577 p->rs_size - 1; | |
| 4578 } else { | |
| 4579 if ((ps->ps_firstblk != p->rs_start) || | |
| 4580 (ps->ps_lastblk != p->rs_start + | |
| 4581 p->rs_size - 1)) { | |
| 4582 /* Remove previous overlap range */ | |
| 4583 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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diff
changeset
|
4584 mirror_overlap_tree_remove(ps); |
| 0 | 4585 |
| 4586 ps->ps_firstblk = p->rs_start; | |
| 4587 ps->ps_lastblk = ps->ps_firstblk + | |
| 4588 p->rs_size - 1; | |
| 4589 | |
| 4590 mutex_exit(&un->un_owner_mx); | |
| 4591 /* Block this range from all i/o. */ | |
| 4592 if (ps->ps_firstblk != 0 || | |
| 4593 ps->ps_lastblk != 0) | |
| 4594 wait_for_overlaps(ps, | |
| 4595 MD_OVERLAP_ALLOW_REPEAT); | |
| 4596 mutex_enter(&un->un_owner_mx); | |
| 4597 /* | |
| 4598 * Check to see if we have obtained | |
| 4599 * ownership while waiting for | |
| 4600 * overlaps. If we have, remove | |
| 4601 * the resync_region entry from the | |
|
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|
4602 * overlap tree |
| 0 | 4603 */ |
| 4604 if (MD_MN_MIRROR_OWNER(un) && | |
| 4605 (ps->ps_flags & MD_MPS_ON_OVERLAP)) | |
|
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|
4606 mirror_overlap_tree_remove(ps); |
| 0 | 4607 } |
| 4608 } | |
| 4609 mutex_exit(&un->un_owner_mx); | |
| 4610 | |
| 4611 /* | |
| 4612 * If this is the first RESYNC_NEXT message (i.e. | |
| 4613 * MD_MN_RS_FIRST_RESYNC_NEXT set in p->rs_flags), | |
| 4614 * issue RESYNC_START NOTIFY event | |
| 4615 */ | |
| 4616 if (p->rs_flags & MD_MN_RS_FIRST_RESYNC_NEXT) { | |
| 4617 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_RESYNC_START, | |
| 4618 SVM_TAG_METADEVICE, MD_UN2SET(un), | |
| 4619 MD_SID(un)); | |
| 4620 } | |
| 4621 | |
| 4622 /* Ensure that our local resync thread is running */ | |
| 4623 if (un->un_rs_thread == NULL) { | |
| 4624 (void) mirror_resync_unit(p->mnum, NULL, | |
| 4625 &p->mde, lockp); | |
| 4626 } | |
| 4627 } | |
| 4628 break; | |
| 4629 case MD_MN_MSG_RESYNC_FINISH: | |
| 4630 /* | |
| 4631 * Complete the resync by stopping the resync thread. | |
| 4632 * Also release the previous overlap region field. | |
| 4633 * Update the resync_progress_thread by cv_signal'ing it so | |
| 4634 * that we mark the end of the resync as soon as possible. This | |
| 4635 * stops an unnecessary delay should be panic after resync | |
| 4636 * completion. | |
| 4637 */ | |
| 4638 #ifdef DEBUG | |
| 4639 if (!rs_active) { | |
| 4640 if (mirror_debug_flag) | |
| 4641 printf("RESYNC_FINISH (mnum = %x), " | |
| 4642 "Resync *NOT* active", | |
| 4643 p->mnum); | |
| 4644 } | |
| 4645 #endif | |
| 4646 | |
| 4647 if ((un->c.un_status & MD_UN_RESYNC_ACTIVE) && | |
| 4648 (p->rs_originator != md_mn_mynode_id)) { | |
| 4649 mutex_enter(&un->un_rs_thread_mx); | |
| 4650 un->c.un_status &= ~MD_UN_RESYNC_CANCEL; | |
| 4651 un->un_rs_thread_flags |= MD_RI_SHUTDOWN; | |
| 4652 un->un_rs_thread_flags &= | |
| 4653 ~(MD_RI_BLOCK|MD_RI_BLOCK_OWNER); | |
| 4654 cv_signal(&un->un_rs_thread_cv); | |
| 4655 mutex_exit(&un->un_rs_thread_mx); | |
| 4656 } | |
| 4657 if (is_ABR) { | |
| 4658 /* Resync finished, if ABR set owner to NULL */ | |
| 4659 mutex_enter(&un->un_owner_mx); | |
| 4660 un->un_mirror_owner = 0; | |
| 4661 mutex_exit(&un->un_owner_mx); | |
| 4662 } | |
| 4663 (void) md_ioctl_writerlock(lockp, ui); | |
|
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|
4664 ps = un->un_rs_prev_overlap; |
| 0 | 4665 if (ps != NULL) { |
| 4666 /* Remove previous overlap range */ | |
| 4667 if (ps->ps_flags & MD_MPS_ON_OVERLAP) | |
|
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|
4668 mirror_overlap_tree_remove(ps); |
| 0 | 4669 /* |
| 4670 * Release the overlap range reference | |
| 4671 */ | |
|
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|
4672 un->un_rs_prev_overlap = NULL; |
| 0 | 4673 kmem_cache_free(mirror_parent_cache, |
| 4674 ps); | |
| 4675 } | |
| 4676 md_ioctl_writerexit(lockp); | |
| 4677 | |
| 4678 /* Mark the resync as complete in the metadb */ | |
| 4679 un->un_rs_resync_done = p->rs_done; | |
| 4680 un->un_rs_resync_2_do = p->rs_2_do; | |
| 4681 un->un_rs_type = p->rs_type; | |
| 4682 mutex_enter(&un->un_rs_progress_mx); | |
| 4683 cv_signal(&un->un_rs_progress_cv); | |
| 4684 mutex_exit(&un->un_rs_progress_mx); | |
| 4685 | |
| 4686 un = md_ioctl_writerlock(lockp, ui); | |
| 4687 un->c.un_status &= ~MD_UN_RESYNC_ACTIVE; | |
| 4688 /* Deal with any pending grow_unit */ | |
| 4689 if (un->c.un_status & MD_UN_GROW_PENDING) { | |
| 4690 if ((mirror_grow_unit(un, &mde) != 0) || | |
| 4691 (! mdismderror(&mde, MDE_GROW_DELAYED))) { | |
| 4692 un->c.un_status &= ~MD_UN_GROW_PENDING; | |
| 4693 } | |
| 4694 } | |
| 4695 md_ioctl_writerexit(lockp); | |
| 4696 break; | |
| 4697 | |
| 4698 case MD_MN_MSG_RESYNC_PHASE_DONE: | |
| 4699 /* | |
| 4700 * A phase of the resync, optimized. component or | |
| 4701 * submirror is complete. Update mirror status. | |
| 4702 * If the flag CLEAR_OPT_NOT_DONE is set, it means that the | |
| 4703 * mirror owner is peforming a resync. If we have just snarfed | |
| 4704 * this set, then we must clear any of the flags set at snarf | |
| 4705 * time by unit_setup_resync(). | |
| 4706 * Note that unit_setup_resync() sets up these flags to | |
| 4707 * indicate that an optimized resync is required. These flags | |
| 4708 * need to be reset because if we get here, the mirror owner | |
| 4709 * will have handled the optimized resync. | |
| 4710 * The flags that must be cleared are MD_UN_OPT_NOT_DONE and | |
| 4711 * MD_UN_WAR. In addition, for each submirror, | |
| 4712 * MD_SM_RESYNC_TARGET must be cleared and SMS_OFFLINE_RESYNC | |
| 4713 * set to SMS_OFFLINE. | |
| 4714 */ | |
| 4715 #ifdef DEBUG | |
| 4716 if (mirror_debug_flag) | |
| 4717 printf("phase done mess received from %d, mnum=%x," | |
| 4718 "type=%x, flags=%x\n", p->rs_originator, p->mnum, | |
| 4719 p->rs_type, p->rs_flags); | |
| 4720 #endif | |
| 4721 /* | |
| 4722 * Ignore the message if there is no active resync thread. | |
| 4723 */ | |
| 4724 if (!rs_active) | |
| 4725 break; | |
| 4726 | |
| 4727 broke_out = p->rs_flags & MD_MN_RS_ERR; | |
| 4728 switch (RS_TYPE(p->rs_type)) { | |
| 4729 case MD_RS_OPTIMIZED: | |
| 4730 un = md_ioctl_writerlock(lockp, ui); | |
| 4731 if (p->rs_flags & MD_MN_RS_CLEAR_OPT_NOT_DONE) { | |
| 4732 /* If we are originator, just clear rs_type */ | |
| 4733 if (p->rs_originator == md_mn_mynode_id) { | |
| 4734 SET_RS_TYPE_NONE(un->un_rs_type); | |
| 4735 md_ioctl_writerexit(lockp); | |
| 4736 break; | |
| 4737 } | |
| 4738 /* | |
| 4739 * If CLEAR_OPT_NOT_DONE is set, only clear the | |
| 4740 * flags if OPT_NOT_DONE is set *and* rs_type | |
| 4741 * is MD_RS_NONE. | |
| 4742 */ | |
| 4743 if ((un->c.un_status & MD_UN_OPT_NOT_DONE) && | |
| 4744 (RS_TYPE(un->un_rs_type) == MD_RS_NONE)) { | |
| 4745 /* No resync in progress */ | |
| 4746 un->c.un_status &= ~MD_UN_OPT_NOT_DONE; | |
| 4747 un->c.un_status &= ~MD_UN_WAR; | |
| 4748 } else { | |
| 4749 /* | |
| 4750 * We are in the middle of an | |
| 4751 * optimized resync and this message | |
| 4752 * should be ignored. | |
| 4753 */ | |
| 4754 md_ioctl_writerexit(lockp); | |
| 4755 break; | |
| 4756 } | |
| 4757 } else { | |
| 4758 /* | |
| 4759 * This is the end of an optimized resync, | |
| 4760 * clear the OPT_NOT_DONE and OFFLINE_SM flags | |
| 4761 */ | |
| 4762 | |
| 4763 un->c.un_status &= ~MD_UN_KEEP_DIRTY; | |
| 4764 if (!broke_out) | |
| 4765 un->c.un_status &= ~MD_UN_WAR; | |
| 4766 } | |
| 4767 | |
| 4768 /* | |
| 4769 * Set resync_completed to last resync type and then | |
| 4770 * clear resync_type to indicate no resync in progress | |
| 4771 */ | |
| 4772 un->un_resync_completed = un->un_rs_type; | |
| 4773 SET_RS_TYPE_NONE(un->un_rs_type); | |
| 4774 | |
| 4775 /* | |
| 4776 * If resync is as a result of a submirror ONLINE, | |
| 4777 * reset the submirror state to SMS_RUNNING if the | |
| 4778 * resync was ok else set back to SMS_OFFLINE. | |
| 4779 */ | |
| 4780 for (smi = 0; smi < NMIRROR; smi++) { | |
| 4781 un->un_sm[smi].sm_flags &= | |
| 4782 ~MD_SM_RESYNC_TARGET; | |
| 4783 if (SMS_BY_INDEX_IS(un, smi, | |
| 4784 SMS_OFFLINE_RESYNC)) { | |
| 4785 if (p->rs_flags & | |
| 4786 MD_MN_RS_CLEAR_OPT_NOT_DONE) { | |
| 4787 state = SMS_OFFLINE; | |
| 4788 } else { | |
| 4789 state = (broke_out ? | |
| 4790 SMS_OFFLINE : SMS_RUNNING); | |
| 4791 } | |
| 4792 mirror_set_sm_state( | |
| 4793 &un->un_sm[smi], | |
| 4794 &un->un_smic[smi], state, | |
| 4795 broke_out); | |
| 4796 mirror_commit(un, NO_SUBMIRRORS, | |
| 4797 0); | |
| 4798 } | |
| 4799 /* | |
| 4800 * If we still have an offline submirror, reset | |
| 4801 * the OFFLINE_SM flag in the mirror status | |
| 4802 */ | |
| 4803 if (SMS_BY_INDEX_IS(un, smi, | |
| 4804 SMS_OFFLINE)) | |
| 4805 un->c.un_status |= | |
| 4806 MD_UN_OFFLINE_SM; | |
| 4807 } | |
| 4808 md_ioctl_writerexit(lockp); | |
| 4809 break; | |
| 4810 case MD_RS_SUBMIRROR: | |
| 4811 un = md_ioctl_writerlock(lockp, ui); | |
| 4812 smi = RS_SMI(p->rs_type); | |
| 4813 sm = &un->un_sm[smi]; | |
| 4814 smic = &un->un_smic[smi]; | |
| 4815 /* Clear RESYNC target */ | |
| 4816 un->un_sm[smi].sm_flags &= ~MD_SM_RESYNC_TARGET; | |
| 4817 /* | |
| 4818 * Set resync_completed to last resync type and then | |
| 4819 * clear resync_type to indicate no resync in progress | |
| 4820 */ | |
| 4821 un->un_resync_completed = un->un_rs_type; | |
| 4822 SET_RS_TYPE_NONE(un->un_rs_type); | |
| 4823 /* | |
| 4824 * If the resync completed ok reset the submirror | |
| 4825 * state to SMS_RUNNING else reset it to SMS_ATTACHED | |
| 4826 */ | |
| 4827 state = (broke_out ? | |
| 4828 SMS_ATTACHED : SMS_RUNNING); | |
| 4829 mirror_set_sm_state(sm, smic, state, broke_out); | |
| 4830 un->c.un_status &= ~MD_UN_WAR; | |
| 4831 mirror_commit(un, SMI2BIT(smi), 0); | |
| 4832 md_ioctl_writerexit(lockp); | |
| 4833 break; | |
| 4834 case MD_RS_COMPONENT: | |
| 4835 un = md_ioctl_writerlock(lockp, ui); | |
| 4836 smi = RS_SMI(p->rs_type); | |
| 4837 ci = RS_CI(p->rs_type); | |
| 4838 sm = &un->un_sm[smi]; | |
| 4839 smic = &un->un_smic[smi]; | |
| 4840 shared = (md_m_shared_t *) | |
| 4841 (*(smic->sm_shared_by_indx)) | |
| 4842 (sm->sm_dev, sm, ci); | |
| 4843 un->c.un_status &= ~MD_UN_WAR; | |
| 4844 /* Clear RESYNC target */ | |
| 4845 un->un_sm[smi].sm_flags &= ~MD_SM_RESYNC_TARGET; | |
| 4846 /* | |
| 4847 * Set resync_completed to last resync type and then | |
| 4848 * clear resync_type to indicate no resync in progress | |
| 4849 */ | |
| 4850 un->un_resync_completed = un->un_rs_type; | |
| 4851 SET_RS_TYPE_NONE(un->un_rs_type); | |
| 4852 | |
| 4853 /* | |
| 4854 * If the resync completed ok, set the component state | |
| 4855 * to CS_OKAY. | |
| 4856 */ | |
| 4857 if (broke_out) | |
| 4858 shared->ms_flags |= MDM_S_RS_TRIED; | |
| 4859 else { | |
| 4860 /* | |
| 4861 * As we don't transmit the changes, | |
| 4862 * no need to drop the lock. | |
| 4863 */ | |
| 4864 set_sm_comp_state(un, smi, ci, CS_OKAY, 0, | |
| 4865 MD_STATE_NO_XMIT, (IOLOCK *)NULL); | |
| 4866 } | |
| 4867 md_ioctl_writerexit(lockp); | |
| 4868 default: | |
| 4869 break; | |
| 4870 } | |
| 4871 /* | |
| 4872 * If the purpose of this PHASE_DONE message is just to | |
| 4873 * indicate to all other nodes that the optimized resync | |
| 4874 * required (OPT_NOT_DONE) flag is to be cleared, there is | |
| 4875 * no need to generate a notify event as there has not | |
| 4876 * actually been a resync. | |
| 4877 */ | |
| 4878 if (!(p->rs_flags & MD_MN_RS_CLEAR_OPT_NOT_DONE)) { | |
| 4879 if (broke_out) { | |
| 4880 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_RESYNC_FAILED, | |
| 4881 SVM_TAG_METADEVICE, MD_UN2SET(un), | |
| 4882 MD_SID(un)); | |
| 4883 } else { | |
| 4884 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_RESYNC_DONE, | |
| 4885 SVM_TAG_METADEVICE, MD_UN2SET(un), | |
| 4886 MD_SID(un)); | |
| 4887 } | |
| 4888 } | |
| 4889 break; | |
| 4890 | |
| 4891 default: | |
| 4892 #ifdef DEBUG | |
| 4893 cmn_err(CE_PANIC, "mirror_resync_message: Unknown message type" | |
| 4894 " %x\n", p->msg_type); | |
| 4895 #endif | |
| 4896 return (EINVAL); | |
| 4897 } | |
| 4898 return (0); | |
| 4899 } | |
| 4900 | |
| 4901 /* Return a -1 if snarf of optimized record failed and set should be released */ | |
| 4902 static int | |
| 4903 mirror_snarf(md_snarfcmd_t cmd, set_t setno) | |
| 4904 { | |
| 4905 mddb_recid_t recid; | |
| 4906 int gotsomething; | |
| 4907 int all_mirrors_gotten; | |
| 4908 mm_unit_t *un; | |
| 4909 mddb_type_t typ1; | |
| 4910 mddb_de_ic_t *dep; | |
| 4911 mddb_rb32_t *rbp; | |
| 4912 size_t newreqsize; | |
| 4913 mm_unit_t *big_un; | |
| 4914 mm_unit32_od_t *small_un; | |
| 4915 int retval; | |
| 4916 mdi_unit_t *ui; | |
| 4917 | |
| 4918 if (cmd == MD_SNARF_CLEANUP) { | |
| 4919 if (md_get_setstatus(setno) & MD_SET_STALE) | |
| 4920 return (0); | |
| 4921 | |
| 4922 recid = mddb_makerecid(setno, 0); | |
| 4923 typ1 = (mddb_type_t)md_getshared_key(setno, | |
| 4924 mirror_md_ops.md_driver.md_drivername); | |
| 4925 while ((recid = mddb_getnextrec(recid, typ1, MIRROR_REC)) > 0) { | |
| 4926 if (mddb_getrecprivate(recid) & MD_PRV_CLEANUP) { | |
| 4927 un = (mm_unit_t *)mddb_getrecaddr(recid); | |
| 4928 mirror_cleanup(un); | |
| 4929 recid = mddb_makerecid(setno, 0); | |
| 4930 } | |
| 4931 } | |
| 4932 return (0); | |
| 4933 } | |
| 4934 | |
| 4935 all_mirrors_gotten = 1; | |
| 4936 gotsomething = 0; | |
| 4937 | |
| 4938 recid = mddb_makerecid(setno, 0); | |
| 4939 typ1 = (mddb_type_t)md_getshared_key(setno, | |
| 4940 mirror_md_ops.md_driver.md_drivername); | |
| 4941 | |
| 4942 while ((recid = mddb_getnextrec(recid, typ1, MIRROR_REC)) > 0) { | |
| 4943 if (mddb_getrecprivate(recid) & MD_PRV_GOTIT) | |
| 4944 continue; | |
| 4945 | |
| 4946 dep = mddb_getrecdep(recid); | |
| 4947 dep->de_flags = MDDB_F_MIRROR; | |
| 4948 rbp = dep->de_rb; | |
| 4949 | |
|
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4950 switch (rbp->rb_revision) { |
|
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4951 case MDDB_REV_RB: |
|
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4952 case MDDB_REV_RBFN: |
|
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4953 if ((rbp->rb_private & MD_PRV_CONVD) == 0) { |
|
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4954 /* |
|
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|
4955 * This means, we have an old and small |
|
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|
4956 * record and this record hasn't already |
|
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|
4957 * been converted. Before we create an |
|
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4958 * incore metadevice from this we have to |
|
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|
4959 * convert it to a big record. |
|
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|
4960 */ |
|
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|
4961 small_un = |
|
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|
4962 (mm_unit32_od_t *)mddb_getrecaddr(recid); |
|
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4963 newreqsize = sizeof (mm_unit_t); |
|
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4964 big_un = (mm_unit_t *)kmem_zalloc(newreqsize, |
|
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4965 KM_SLEEP); |
|
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4966 mirror_convert((caddr_t)small_un, |
|
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4967 (caddr_t)big_un, SMALL_2_BIG); |
|
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4968 kmem_free(small_un, dep->de_reqsize); |
|
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4969 |
|
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|
4970 /* |
|
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|
4971 * Update userdata and incore userdata |
|
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|
4972 * incores are at the end of un |
|
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|
4973 */ |
|
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|
4974 dep->de_rb_userdata_ic = big_un; |
|
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4975 dep->de_rb_userdata = big_un; |
|
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4976 dep->de_icreqsize = newreqsize; |
|
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|
4977 un = big_un; |
|
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|
4978 rbp->rb_private |= MD_PRV_CONVD; |
|
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parents:
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diff
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|
4979 } else { |
|
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parents:
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diff
changeset
|
4980 /* |
|
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diff
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|
4981 * Unit already converted, just get the |
|
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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parents:
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diff
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|
4982 * record address. |
|
7bac4a816ebe
PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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parents:
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diff
changeset
|
4983 */ |
|
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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parents:
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diff
changeset
|
4984 un = (mm_unit_t *)mddb_getrecaddr_resize(recid, |
|
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6510471 svm overlap chain book keeping does not scale well
jkennedy
parents:
4932
diff
changeset
|
4985 sizeof (*un), 0); |
|
1623
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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diff
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|
4986 } |
|
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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|
4987 un->c.un_revision &= ~MD_64BIT_META_DEV; |
|
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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parents:
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diff
changeset
|
4988 break; |
|
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parents:
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diff
changeset
|
4989 case MDDB_REV_RB64: |
|
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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diff
changeset
|
4990 case MDDB_REV_RB64FN: |
| 0 | 4991 /* Big device */ |
| 4992 un = (mm_unit_t *)mddb_getrecaddr_resize(recid, | |
|
6901
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diff
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|
4993 sizeof (*un), 0); |
|
1623
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|
4994 un->c.un_revision |= MD_64BIT_META_DEV; |
|
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|
4995 un->c.un_flag |= MD_EFILABEL; |
|
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|
4996 break; |
| 0 | 4997 } |
|
2077
ef90dc4e9399
6396946 Misleading typecast on md_remove_minor_node call
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diff
changeset
|
4998 MDDB_NOTE_FN(rbp->rb_revision, un->c.un_revision); |
| 0 | 4999 |
| 5000 /* | |
| 5001 * Create minor device node for snarfed entry. | |
| 5002 */ | |
| 5003 (void) md_create_minor_node(setno, MD_SID(un)); | |
| 5004 | |
| 5005 if (MD_UNIT(MD_SID(un)) != NULL) { | |
| 5006 mddb_setrecprivate(recid, MD_PRV_PENDDEL); | |
| 5007 continue; | |
| 5008 } | |
| 5009 all_mirrors_gotten = 0; | |
| 5010 retval = mirror_build_incore(un, 1); | |
| 5011 if (retval == 0) { | |
| 5012 mddb_setrecprivate(recid, MD_PRV_GOTIT); | |
| 5013 md_create_unit_incore(MD_SID(un), &mirror_md_ops, 0); | |
| 5014 resync_start_timeout(setno); | |
| 5015 gotsomething = 1; | |
|
2063
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6258439 metaset truncates fully qualified mediator host name
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parents:
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diff
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|
5016 } else { |
|
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6258439 metaset truncates fully qualified mediator host name
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|
5017 return (retval); |
| 0 | 5018 } |
| 5019 /* | |
| 5020 * Set flag to indicate that the mirror has not yet | |
| 5021 * been through a reconfig. This flag is used for MN sets | |
| 5022 * when determining whether to update the mirror state from | |
| 5023 * the Master node. | |
| 5024 */ | |
| 5025 if (MD_MNSET_SETNO(setno)) { | |
| 5026 ui = MDI_UNIT(MD_SID(un)); | |
| 5027 ui->ui_tstate |= MD_RESYNC_NOT_DONE; | |
| 5028 } | |
| 5029 } | |
| 5030 | |
| 5031 if (!all_mirrors_gotten) | |
| 5032 return (gotsomething); | |
| 5033 | |
| 5034 recid = mddb_makerecid(setno, 0); | |
| 5035 while ((recid = mddb_getnextrec(recid, typ1, RESYNC_REC)) > 0) | |
| 5036 if (!(mddb_getrecprivate(recid) & MD_PRV_GOTIT)) | |
| 5037 mddb_setrecprivate(recid, MD_PRV_PENDDEL); | |
| 5038 | |
| 5039 return (0); | |
| 5040 } | |
| 5041 | |
| 5042 static int | |
| 5043 mirror_halt(md_haltcmd_t cmd, set_t setno) | |
| 5044 { | |
| 5045 unit_t i; | |
| 5046 mdi_unit_t *ui; | |
| 5047 minor_t mnum; | |
| 5048 int reset_mirror_flag = 0; | |
| 5049 | |
| 5050 if (cmd == MD_HALT_CLOSE) | |
| 5051 return (0); | |
| 5052 | |
| 5053 if (cmd == MD_HALT_OPEN) | |
| 5054 return (0); | |
| 5055 | |
| 5056 if (cmd == MD_HALT_UNLOAD) | |
| 5057 return (0); | |
| 5058 | |
| 5059 if (cmd == MD_HALT_CHECK) { | |
| 5060 for (i = 0; i < md_nunits; i++) { | |
| 5061 mnum = MD_MKMIN(setno, i); | |
| 5062 if ((ui = MDI_UNIT(mnum)) == NULL) | |
| 5063 continue; | |
| 5064 if (ui->ui_opsindex != mirror_md_ops.md_selfindex) | |
| 5065 continue; | |
| 5066 if (md_unit_isopen(ui)) | |
| 5067 return (1); | |
| 5068 } | |
| 5069 return (0); | |
| 5070 } | |
| 5071 | |
| 5072 if (cmd != MD_HALT_DOIT) | |
| 5073 return (1); | |
| 5074 | |
| 5075 for (i = 0; i < md_nunits; i++) { | |
| 5076 mnum = MD_MKMIN(setno, i); | |
| 5077 if ((ui = MDI_UNIT(mnum)) == NULL) | |
| 5078 continue; | |
| 5079 if (ui->ui_opsindex != mirror_md_ops.md_selfindex) | |
| 5080 continue; | |
| 5081 reset_mirror((mm_unit_t *)MD_UNIT(mnum), mnum, 0); | |
| 5082 | |
| 5083 /* Set a flag if there is at least one mirror metadevice. */ | |
| 5084 reset_mirror_flag = 1; | |
| 5085 } | |
| 5086 | |
| 5087 /* | |
| 5088 * Only wait for the global dr_timeout to finish | |
| 5089 * - if there are mirror metadevices in this diskset or | |
| 5090 * - if this is the local set since an unload of the md_mirror | |
| 5091 * driver could follow a successful mirror halt in the local set. | |
| 5092 */ | |
| 5093 if ((reset_mirror_flag != 0) || (setno == MD_LOCAL_SET)) { | |
| 5094 while ((mirror_md_ops.md_head == NULL) && | |
| 5095 (mirror_timeout.dr_timeout_id != 0)) | |
| 5096 delay(md_hz); | |
| 5097 } | |
| 5098 | |
| 5099 return (0); | |
| 5100 } | |
| 5101 | |
| 5102 /*ARGSUSED3*/ | |
| 5103 static int | |
| 5104 mirror_open(dev_t *dev, int flag, int otyp, cred_t *cred_p, int md_oflags) | |
| 5105 { | |
| 5106 IOLOCK lock; | |
|
46
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|
5107 minor_t mnum = getminor(*dev); |
|
042bf15ebd92
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0
diff
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|
5108 set_t setno; |
|
042bf15ebd92
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diff
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|
5109 |
|
042bf15ebd92
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diff
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|
5110 /* |
|
042bf15ebd92
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diff
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|
5111 * When doing an open of a multi owner metadevice, check to see if this |
|
042bf15ebd92
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diff
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|
5112 * node is a starting node and if a reconfig cycle is underway. |
|
042bf15ebd92
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0
diff
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|
5113 * If so, the system isn't sufficiently set up enough to handle the |
|
042bf15ebd92
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diff
changeset
|
5114 * open (which involves I/O during sp_validate), so fail with ENXIO. |
|
042bf15ebd92
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diff
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|
5115 */ |
|
042bf15ebd92
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|
5116 setno = MD_MIN2SET(mnum); |
|
042bf15ebd92
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diff
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|
5117 if ((md_set[setno].s_status & (MD_SET_MNSET | MD_SET_MN_START_RC)) == |
|
042bf15ebd92
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diff
changeset
|
5118 (MD_SET_MNSET | MD_SET_MN_START_RC)) { |
|
042bf15ebd92
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0
diff
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|
5119 return (ENXIO); |
|
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diff
changeset
|
5120 } |
| 0 | 5121 |
| 5122 if (md_oflags & MD_OFLG_FROMIOCTL) { | |
| 5123 /* | |
| 5124 * This indicates that the caller is an ioctl service routine. | |
| 5125 * In this case we initialise our stack-based IOLOCK and pass | |
| 5126 * this into the internal open routine. This allows multi-owner | |
| 5127 * metadevices to avoid deadlocking if an error is encountered | |
| 5128 * during the open() attempt. The failure case is: | |
| 5129 * s-p -> mirror -> s-p (with error). Attempting to metaclear | |
| 5130 * this configuration would deadlock as the mirror code has to | |
| 5131 * send a state-update to the other nodes when it detects the | |
| 5132 * failure of the underlying submirror with an errored soft-part | |
| 5133 * on it. As there is a class1 message in progress (metaclear) | |
| 5134 * set_sm_comp_state() cannot send another class1 message; | |
| 5135 * instead we do not send a state_update message as the | |
| 5136 * metaclear is distributed and the failed submirror will be | |
| 5137 * cleared from the configuration by the metaclear. | |
| 5138 */ | |
| 5139 IOLOCK_INIT(&lock); | |
| 5140 return (mirror_internal_open(getminor(*dev), flag, otyp, | |
| 5141 md_oflags, &lock)); | |
| 5142 } else { | |
| 5143 return (mirror_internal_open(getminor(*dev), flag, otyp, | |
| 5144 md_oflags, (IOLOCK *)NULL)); | |
| 5145 } | |
| 5146 } | |
| 5147 | |
| 5148 | |
| 5149 /*ARGSUSED1*/ | |
| 5150 static int | |
| 5151 mirror_close(dev_t dev, int flag, int otyp, cred_t *cred_p, int md_cflags) | |
| 5152 { | |
| 5153 return (mirror_internal_close(getminor(dev), otyp, md_cflags, | |
|
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diff
changeset
|
5154 (IOLOCK *)NULL)); |
| 0 | 5155 } |
| 5156 | |
| 5157 | |
| 5158 /* | |
| 5159 * This routine dumps memory to the disk. It assumes that the memory has | |
| 5160 * already been mapped into mainbus space. It is called at disk interrupt | |
| 5161 * priority when the system is in trouble. | |
| 5162 * | |
| 5163 */ | |
| 5164 static int | |
| 5165 mirror_dump(dev_t dev, caddr_t addr, daddr_t blkno, int nblk) | |
| 5166 { | |
| 5167 mm_unit_t *un; | |
| 5168 dev_t mapdev; | |
| 5169 int result; | |
| 5170 int smi; | |
| 5171 int any_succeed = 0; | |
| 5172 int save_result = 0; | |
| 5173 | |
| 5174 /* | |
| 5175 * Don't need to grab the unit lock. | |
| 5176 * Cause nothing else is suppose to be happenning. | |
| 5177 * Also dump is not suppose to sleep. | |
| 5178 */ | |
| 5179 un = (mm_unit_t *)MD_UNIT(getminor(dev)); | |
| 5180 | |
| 5181 if ((diskaddr_t)blkno >= un->c.un_total_blocks) | |
| 5182 return (EINVAL); | |
| 5183 | |
| 5184 if ((diskaddr_t)blkno + nblk > un->c.un_total_blocks) | |
| 5185 return (EINVAL); | |
| 5186 | |
| 5187 for (smi = 0; smi < NMIRROR; smi++) { | |
| 5188 if (!SUBMIRROR_IS_WRITEABLE(un, smi)) | |
| 5189 continue; | |
| 5190 mapdev = md_dev64_to_dev(un->un_sm[smi].sm_dev); | |
| 5191 result = bdev_dump(mapdev, addr, blkno, nblk); | |
| 5192 if (result) | |
| 5193 save_result = result; | |
| 5194 | |
| 5195 if (result == 0) | |
| 5196 any_succeed++; | |
| 5197 } | |
| 5198 | |
| 5199 if (any_succeed) | |
| 5200 return (0); | |
| 5201 | |
| 5202 return (save_result); | |
| 5203 } | |
| 5204 | |
| 5205 /* | |
| 5206 * NAME: mirror_probe_dev | |
| 5207 * | |
| 5208 * DESCRITPION: force opens every component of a mirror. | |
| 5209 * | |
| 5210 * On entry the unit writerlock is held | |
| 5211 */ | |
| 5212 static int | |
| 5213 mirror_probe_dev(mdi_unit_t *ui, minor_t mnum) | |
| 5214 { | |
| 5215 int i; | |
| 5216 int smi; | |
| 5217 int ci; | |
| 5218 mm_unit_t *un; | |
| 5219 int md_devopen = 0; | |
| 5220 set_t setno; | |
| 5221 int sm_cnt; | |
| 5222 int sm_unavail_cnt; | |
| 5223 | |
| 5224 if (md_unit_isopen(ui)) | |
| 5225 md_devopen++; | |
| 5226 | |
| 5227 un = MD_UNIT(mnum); | |
| 5228 setno = MD_UN2SET(un); | |
| 5229 | |
| 5230 sm_cnt = 0; | |
| 5231 sm_unavail_cnt = 0; | |
| 5232 for (i = 0; i < NMIRROR; i++) { | |
| 5233 md_dev64_t tmpdev; | |
| 5234 mdi_unit_t *sm_ui; | |
| 5235 | |
| 5236 if (!SMS_BY_INDEX_IS(un, i, SMS_INUSE)) { | |
| 5237 continue; | |
| 5238 } | |
| 5239 | |
| 5240 sm_cnt++; | |
| 5241 tmpdev = un->un_sm[i].sm_dev; | |
| 5242 (void) md_layered_open(mnum, &tmpdev, | |
|
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parents:
4932
diff
changeset
|
5243 MD_OFLG_CONT_ERRS | MD_OFLG_PROBEDEV); |
| 0 | 5244 un->un_sm[i].sm_dev = tmpdev; |
| 5245 | |
| 5246 sm_ui = MDI_UNIT(getminor(md_dev64_to_dev(tmpdev))); | |
| 5247 | |
| 5248 /* | |
| 5249 * Logic similar to that in mirror_open_all_devs. We set or | |
| 5250 * clear the submirror Unavailable bit. | |
| 5251 */ | |
| 5252 (void) md_unit_writerlock(sm_ui); | |
| 5253 if (submirror_unavailable(un, i, 1)) { | |
| 5254 sm_ui->ui_tstate |= MD_INACCESSIBLE; | |
| 5255 sm_unavail_cnt++; | |
| 5256 } else { | |
| 5257 sm_ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 5258 } | |
| 5259 md_unit_writerexit(sm_ui); | |
| 5260 } | |
| 5261 | |
| 5262 /* | |
| 5263 * If all of the submirrors are unavailable, the mirror is also | |
| 5264 * unavailable. | |
| 5265 */ | |
| 5266 if (sm_cnt == sm_unavail_cnt) { | |
| 5267 ui->ui_tstate |= MD_INACCESSIBLE; | |
| 5268 } else { | |
| 5269 ui->ui_tstate &= ~MD_INACCESSIBLE; | |
| 5270 } | |
| 5271 | |
| 5272 /* | |
| 5273 * Start checking from probe failures. If failures occur we | |
| 5274 * set the appropriate erred state only if the metadevice is in | |
| 5275 * use. This is specifically to prevent unnecessary resyncs. | |
| 5276 * For instance if the disks were accidentally disconnected when | |
| 5277 * the system booted up then until the metadevice is accessed | |
| 5278 * (like file system mount) the user can shutdown, recable and | |
| 5279 * reboot w/o incurring a potentially huge resync. | |
| 5280 */ | |
| 5281 | |
| 5282 smi = 0; | |
| 5283 ci = 0; | |
| 5284 while (mirror_geterror(un, &smi, &ci, 1, 1) != 0) { | |
| 5285 | |
| 5286 if (mirror_other_sources(un, smi, ci, 0) == 1) { | |
| 5287 /* | |
| 5288 * Note that for a MN set, there is no need to call | |
| 5289 * SE_NOTIFY as that is done when processing the | |
| 5290 * state change | |
| 5291 */ | |
| 5292 if (md_devopen) { | |
| 5293 /* | |
| 5294 * Never called from ioctl context, | |
| 5295 * so (IOLOCK *)NULL | |
| 5296 */ | |
| 5297 set_sm_comp_state(un, smi, ci, CS_LAST_ERRED, | |
| 5298 0, MD_STATE_XMIT, (IOLOCK *)NULL); | |
| 5299 if (!MD_MNSET_SETNO(setno)) { | |
| 5300 SE_NOTIFY(EC_SVM_STATE, | |
| 5301 ESC_SVM_LASTERRED, | |
| 5302 SVM_TAG_METADEVICE, setno, | |
| 5303 MD_SID(un)); | |
| 5304 } | |
| 5305 continue; | |
| 5306 } else { | |
| 5307 (void) mirror_close_all_devs(un, | |
| 5308 MD_OFLG_PROBEDEV); | |
| 5309 if (!MD_MNSET_SETNO(setno)) { | |
| 5310 SE_NOTIFY(EC_SVM_STATE, | |
| 5311 ESC_SVM_OPEN_FAIL, | |
| 5312 SVM_TAG_METADEVICE, setno, | |
| 5313 MD_SID(un)); | |
| 5314 } | |
| 5315 mirror_openfail_console_info(un, smi, ci); | |
| 5316 return (ENXIO); | |
| 5317 } | |
| 5318 } | |
| 5319 | |
| 5320 /* | |
| 5321 * Note that for a MN set, there is no need to call | |
| 5322 * SE_NOTIFY as that is done when processing the | |
| 5323 * state change | |
| 5324 */ | |
| 5325 if (md_devopen) { | |
| 5326 /* Never called from ioctl context, so (IOLOCK *)NULL */ | |
| 5327 set_sm_comp_state(un, smi, ci, CS_ERRED, 0, | |
| 5328 MD_STATE_XMIT, (IOLOCK *)NULL); | |
| 5329 if (!MD_MNSET_SETNO(setno)) { | |
| 5330 SE_NOTIFY(EC_SVM_STATE, ESC_SVM_ERRED, | |
| 5331 SVM_TAG_METADEVICE, setno, | |
| 5332 MD_SID(un)); | |
| 5333 } | |
| 5334 } | |
| 5335 mirror_openfail_console_info(un, smi, ci); | |
| 5336 ci++; | |
| 5337 } | |
| 5338 | |
| 5339 if (MD_MNSET_SETNO(setno)) { | |
| 5340 send_poke_hotspares(setno); | |
| 5341 } else { | |
| 5342 (void) poke_hotspares(); | |
| 5343 } | |
| 5344 (void) mirror_close_all_devs(un, MD_OFLG_PROBEDEV); | |
| 5345 | |
| 5346 return (0); | |
| 5347 } | |
| 5348 | |
| 5349 | |
| 5350 static int | |
| 5351 mirror_imp_set( | |
| 5352 set_t setno | |
| 5353 ) | |
| 5354 { | |
| 5355 | |
| 5356 mddb_recid_t recid; | |
| 5357 int gotsomething, i; | |
| 5358 mddb_type_t typ1; | |
| 5359 mddb_de_ic_t *dep; | |
| 5360 mddb_rb32_t *rbp; | |
| 5361 mm_unit32_od_t *un32; | |
| 5362 mm_unit_t *un64; | |
|
1623
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diff
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|
5363 md_dev64_t self_devt; |
| 0 | 5364 minor_t *self_id; /* minor needs to be updated */ |
| 5365 md_parent_t *parent_id; /* parent needs to be updated */ | |
| 5366 mddb_recid_t *record_id; /* record id needs to be updated */ | |
| 5367 mddb_recid_t *optrec_id; | |
| 5368 md_dev64_t tmpdev; | |
| 5369 | |
| 5370 | |
| 5371 gotsomething = 0; | |
| 5372 | |
| 5373 typ1 = (mddb_type_t)md_getshared_key(setno, | |
| 5374 mirror_md_ops.md_driver.md_drivername); | |
| 5375 recid = mddb_makerecid(setno, 0); | |
| 5376 | |
| 5377 while ((recid = mddb_getnextrec(recid, typ1, MIRROR_REC)) > 0) { | |
| 5378 if (mddb_getrecprivate(recid) & MD_PRV_GOTIT) | |
| 5379 continue; | |
| 5380 | |
| 5381 dep = mddb_getrecdep(recid); | |
| 5382 rbp = dep->de_rb; | |
| 5383 | |
|
1623
7bac4a816ebe
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diff
changeset
|
5384 switch (rbp->rb_revision) { |
|
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diff
changeset
|
5385 case MDDB_REV_RB: |
|
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diff
changeset
|
5386 case MDDB_REV_RBFN: |
| 0 | 5387 /* |
| 5388 * Small device | |
| 5389 */ | |
| 5390 un32 = (mm_unit32_od_t *)mddb_getrecaddr(recid); | |
| 5391 self_id = &(un32->c.un_self_id); | |
| 5392 parent_id = &(un32->c.un_parent); | |
| 5393 record_id = &(un32->c.un_record_id); | |
| 5394 optrec_id = &(un32->un_rr_dirty_recid); | |
| 5395 | |
| 5396 for (i = 0; i < un32->un_nsm; i++) { | |
|
6901
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6510471 svm overlap chain book keeping does not scale well
jkennedy
parents:
4932
diff
changeset
|
5397 tmpdev = md_expldev(un32->un_sm[i].sm_dev); |
|
307e592cef33
6510471 svm overlap chain book keeping does not scale well
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parents:
4932
diff
changeset
|
5398 un32->un_sm[i].sm_dev = md_cmpldev |
|
307e592cef33
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parents:
4932
diff
changeset
|
5399 (md_makedevice(md_major, MD_MKMIN(setno, |
|
307e592cef33
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jkennedy
parents:
4932
diff
changeset
|
5400 MD_MIN2UNIT(md_getminor(tmpdev))))); |
|
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parents:
4932
diff
changeset
|
5401 |
|
307e592cef33
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4932
diff
changeset
|
5402 if (!md_update_minor(setno, mddb_getsidenum |
|
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jkennedy
parents:
4932
diff
changeset
|
5403 (setno), un32->un_sm[i].sm_key)) |
| 0 | 5404 goto out; |
| 5405 } | |
|
1623
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PSARC/2005/153 Bunnahabhain: Descriptive Name Support in SVM
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parents:
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diff
changeset
|
5406 break; |
|
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|
5407 case MDDB_REV_RB64: |
|
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diff
changeset
|
5408 case MDDB_REV_RB64FN: |
| 0 | 5409 un64 = (mm_unit_t *)mddb_getrecaddr(recid); |
| 5410 self_id = &(un64->c.un_self_id); | |
| 5411 parent_id = &(un64->c.un_parent); | |
| 5412 record_id = &(un64->c.un_record_id); | |
| 5413 optrec_id = &(un64->un_rr_dirty_recid); | |
| 5414 | |
| 5415 for (i = 0; i < un64->un_nsm; i++) { | |
|
6901
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diff
changeset
|
5416 tmpdev = un64->un_sm[i].sm_dev; |
|
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diff
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|
5417 un64->un_sm[i].sm_dev = md_makedevice |
|
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diff
changeset
|
5418 (md_major, MD_MKMIN(setno, MD_MIN2UNIT |
|
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diff
changeset
|
5419 (md_getminor(tmpdev)))); |
|
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diff
changeset
|
5420 |
|
307e592cef33
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diff
changeset
|
5421 if (!md_update_minor(setno, mddb_getsidenum |
|
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parents:
4932
diff
changeset
|
5422 (setno), un64->un_sm[i].sm_key)) |
| 0 | 5423 goto out; |
| 5424 } | |
|
1623
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diff
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|
5425 break; |
|
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|
5426 } |
|
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|
5427 |
|
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changeset
|
5428 /* |
|
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diff
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|
5429 * If this is a top level and a friendly name metadevice, |
|
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diff
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|
5430 * update its minor in the namespace. |
|
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|
5431 */ |
|
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diff
changeset
|
5432 if ((*parent_id == MD_NO_PARENT) && |
|
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diff
changeset
|
5433 ((rbp->rb_revision == MDDB_REV_RBFN) || |
|
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diff
changeset
|
5434 (rbp->rb_revision == MDDB_REV_RB64FN))) { |
|
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diff
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|
5435 |
|
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|
5436 self_devt = md_makedevice(md_major, *self_id); |
|
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diff
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|
5437 if (!md_update_top_device_minor(setno, |
|
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diff
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|
5438 mddb_getsidenum(setno), self_devt)) |
|
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diff
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|
5439 goto out; |
| 0 | 5440 } |
| 5441 | |
| 5442 /* | |
| 5443 * Update unit with the imported setno | |
| 5444 * | |
| 5445 */ | |
| 5446 mddb_setrecprivate(recid, MD_PRV_GOTIT); | |
| 5447 | |
| 5448 *self_id = MD_MKMIN(setno, MD_MIN2UNIT(*self_id)); | |
| 5449 if (*parent_id != MD_NO_PARENT) | |
| 5450 *parent_id = MD_MKMIN(setno, MD_MIN2UNIT(*parent_id)); | |
| 5451 *record_id = MAKERECID(setno, DBID(*record_id)); | |
| 5452 *optrec_id = MAKERECID(setno, DBID(*optrec_id)); | |
| 5453 | |
| 5454 gotsomething = 1; | |
| 5455 } | |
| 5456 | |
| 5457 out: | |
| 5458 return (gotsomething); | |
| 5459 } | |
| 5460 | |
| 5461 /* | |
| 5462 * NAME: mirror_check_offline | |
| 5463 * | |
| 5464 * DESCRIPTION: return offline_status = 1 if any submirrors are offline | |
| 5465 * | |
| 5466 * Called from ioctl, so access to MD_UN_OFFLINE_SM in un_status is | |
| 5467 * protected by the global ioctl lock as it is only set by the MD_IOCOFFLINE | |
| 5468 * ioctl. | |
| 5469 */ | |
| 5470 int | |
| 5471 mirror_check_offline(md_dev64_t dev, int *offline_status) | |
| 5472 { | |
| 5473 mm_unit_t *un; | |
| 5474 md_error_t mde = mdnullerror; | |
| 5475 | |
| 5476 if ((un = mirror_getun(getminor(dev), &mde, NO_LOCK, NULL)) == NULL) | |
| 5477 return (EINVAL); | |
| 5478 *offline_status = 0; | |
| 5479 if (un->c.un_status & MD_UN_OFFLINE_SM) | |
| 5480 *offline_status = 1; | |
| 5481 return (0); | |
| 5482 } | |
| 5483 | |
| 5484 /* | |
| 5485 * NAME: mirror_inc_abr_count | |
| 5486 * | |
| 5487 * DESCRIPTION: increment the count of layered soft parts with ABR set | |
| 5488 * | |
| 5489 * Called from ioctl, so access to un_abr_count is protected by the global | |
| 5490 * ioctl lock. It is only referenced in the MD_IOCOFFLINE ioctl. | |
| 5491 */ | |
| 5492 int | |
| 5493 mirror_inc_abr_count(md_dev64_t dev) | |
| 5494 { | |
| 5495 mm_unit_t *un; | |
| 5496 md_error_t mde = mdnullerror; | |
| 5497 | |
| 5498 if ((un = mirror_getun(getminor(dev), &mde, NO_LOCK, NULL)) == NULL) | |
| 5499 return (EINVAL); | |
| 5500 un->un_abr_count++; | |
| 5501 return (0); | |
| 5502 } | |
| 5503 | |
| 5504 /* | |
| 5505 * NAME: mirror_dec_abr_count | |
| 5506 * | |
| 5507 * DESCRIPTION: decrement the count of layered soft parts with ABR set | |
| 5508 * | |
| 5509 * Called from ioctl, so access to un_abr_count is protected by the global | |
| 5510 * ioctl lock. It is only referenced in the MD_IOCOFFLINE ioctl. | |
| 5511 */ | |
| 5512 int | |
| 5513 mirror_dec_abr_count(md_dev64_t dev) | |
| 5514 { | |
| 5515 mm_unit_t *un; | |
| 5516 md_error_t mde = mdnullerror; | |
| 5517 | |
| 5518 if ((un = mirror_getun(getminor(dev), &mde, NO_LOCK, NULL)) == NULL) | |
| 5519 return (EINVAL); | |
| 5520 un->un_abr_count--; | |
| 5521 return (0); | |
| 5522 } | |
| 5523 | |
| 5524 static md_named_services_t mirror_named_services[] = { | |
| 5525 {(intptr_t (*)()) poke_hotspares, "poke hotspares" }, | |
| 5526 {(intptr_t (*)()) mirror_rename_listkids, MDRNM_LIST_URKIDS }, | |
| 5527 {mirror_rename_check, MDRNM_CHECK }, | |
| 5528 {(intptr_t (*)()) mirror_renexch_update_kids, MDRNM_UPDATE_KIDS }, | |
| 5529 {(intptr_t (*)()) mirror_exchange_parent_update_to, | |
| 5530 MDRNM_PARENT_UPDATE_TO}, | |
| 5531 {(intptr_t (*)()) mirror_exchange_self_update_from_down, | |
| 5532 MDRNM_SELF_UPDATE_FROM_DOWN }, | |
| 5533 {(intptr_t (*)())mirror_probe_dev, "probe open test" }, | |
| 5534 {(intptr_t (*)())mirror_check_offline, MD_CHECK_OFFLINE }, | |
| 5535 {(intptr_t (*)())mirror_inc_abr_count, MD_INC_ABR_COUNT }, | |
| 5536 {(intptr_t (*)())mirror_dec_abr_count, MD_DEC_ABR_COUNT }, | |
| 5537 { NULL, 0 } | |
| 5538 }; | |
| 5539 | |
| 5540 md_ops_t mirror_md_ops = { | |
| 5541 mirror_open, /* open */ | |
| 5542 mirror_close, /* close */ | |
| 5543 md_mirror_strategy, /* strategy */ | |
| 5544 NULL, /* print */ | |
| 5545 mirror_dump, /* dump */ | |
| 5546 NULL, /* read */ | |
| 5547 NULL, /* write */ | |
| 5548 md_mirror_ioctl, /* mirror_ioctl, */ | |
| 5549 mirror_snarf, /* mirror_snarf */ | |
| 5550 mirror_halt, /* mirror_halt */ | |
| 5551 NULL, /* aread */ | |
| 5552 NULL, /* awrite */ | |
| 5553 mirror_imp_set, /* import set */ | |
| 5554 mirror_named_services | |
| 5555 }; | |
| 5556 | |
| 5557 /* module specific initilization */ | |
| 5558 static void | |
| 5559 init_init() | |
| 5560 { | |
| 5561 md_mirror_mcs_buf_off = sizeof (md_mcs_t) - sizeof (buf_t); | |
| 5562 | |
| 5563 /* Initialize the parent and child save memory pools */ | |
| 5564 mirror_parent_cache = kmem_cache_create("md_mirror_parent", | |
| 5565 sizeof (md_mps_t), 0, mirror_parent_constructor, | |
| 5566 mirror_parent_destructor, mirror_run_queue, NULL, NULL, | |
| 5567 0); | |
| 5568 | |
| 5569 mirror_child_cache = kmem_cache_create("md_mirror_child", | |
| 5570 sizeof (md_mcs_t) - sizeof (buf_t) + biosize(), 0, | |
| 5571 mirror_child_constructor, mirror_child_destructor, | |
| 5572 mirror_run_queue, NULL, NULL, 0); | |
| 5573 | |
| 5574 /* | |
| 5575 * Insure wowbuf_size is a multiple of DEV_BSIZE, | |
| 5576 * then initialize wowbuf memory pool. | |
| 5577 */ | |
| 5578 md_wowbuf_size = roundup(md_wowbuf_size, DEV_BSIZE); | |
| 5579 if (md_wowbuf_size <= 0) | |
| 5580 md_wowbuf_size = 2 * DEV_BSIZE; | |
| 5581 if (md_wowbuf_size > (32 * DEV_BSIZE)) | |
| 5582 md_wowbuf_size = (32 * DEV_BSIZE); | |
| 5583 | |
| 5584 md_wowblk_size = md_wowbuf_size + sizeof (wowhdr_t); | |
| 5585 mirror_wowblk_cache = kmem_cache_create("md_mirror_wow", | |
| 5586 md_wowblk_size, 0, NULL, NULL, NULL, NULL, NULL, 0); | |
| 5587 | |
| 5588 mutex_init(&mirror_timeout.dr_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 5589 mutex_init(&hotspare_request.dr_mx, NULL, MUTEX_DEFAULT, NULL); | |
| 5590 | |
| 5591 mutex_init(&non_ff_drv_mutex, NULL, MUTEX_DEFAULT, NULL); | |
| 5592 } | |
| 5593 | |
| 5594 /* module specific uninitilization (undo init_init()) */ | |
| 5595 static void | |
| 5596 fini_uninit() | |
| 5597 { | |
| 5598 kmem_cache_destroy(mirror_parent_cache); | |
| 5599 kmem_cache_destroy(mirror_child_cache); | |
| 5600 kmem_cache_destroy(mirror_wowblk_cache); | |
| 5601 mirror_parent_cache = mirror_child_cache = | |
| 5602 mirror_wowblk_cache = NULL; | |
| 5603 | |
| 5604 mutex_destroy(&mirror_timeout.dr_mx); | |
| 5605 mutex_destroy(&hotspare_request.dr_mx); | |
| 5606 mutex_destroy(&non_ff_drv_mutex); | |
| 5607 } | |
| 5608 | |
| 5609 /* define the module linkage */ | |
|
4932
cac85bf517af
6464843 metaset -s <setname> -C purge should work on oban sets
petede
parents:
2077
diff
changeset
|
5610 MD_PLUGIN_MISC_MODULE("mirrors module", init_init(), fini_uninit()) |