dm_target_delay.c revision 1.2.4.2
1 1.2.4.2 martin /* $NetBSD: dm_target_delay.c,v 1.2.4.2 2020/04/08 14:08:03 martin Exp $ */ 2 1.2.4.2 martin 3 1.2.4.2 martin /* 4 1.2.4.2 martin * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 1.2.4.2 martin * Copyright (c) 2015 The DragonFly Project. All rights reserved. 6 1.2.4.2 martin * All rights reserved. 7 1.2.4.2 martin * 8 1.2.4.2 martin * This code is derived from software contributed to The NetBSD Foundation 9 1.2.4.2 martin * by Tomohiro Kusumi <tkusumi (at) netbsd.org>. 10 1.2.4.2 martin * 11 1.2.4.2 martin * Redistribution and use in source and binary forms, with or without 12 1.2.4.2 martin * modification, are permitted provided that the following conditions 13 1.2.4.2 martin * are met: 14 1.2.4.2 martin * 1. Redistributions of source code must retain the above copyright 15 1.2.4.2 martin * notice, this list of conditions and the following disclaimer. 16 1.2.4.2 martin * 2. Redistributions in binary form must reproduce the above copyright 17 1.2.4.2 martin * notice, this list of conditions and the following disclaimer in the 18 1.2.4.2 martin * documentation and/or other materials provided with the distribution. 19 1.2.4.2 martin * 20 1.2.4.2 martin * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 1.2.4.2 martin * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 1.2.4.2 martin * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 1.2.4.2 martin * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 1.2.4.2 martin * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 1.2.4.2 martin * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 1.2.4.2 martin * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 1.2.4.2 martin * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 1.2.4.2 martin * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 1.2.4.2 martin * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 1.2.4.2 martin * POSSIBILITY OF SUCH DAMAGE. 31 1.2.4.2 martin */ 32 1.2.4.2 martin #include <sys/cdefs.h> 33 1.2.4.2 martin __KERNEL_RCSID(0, "$NetBSD: dm_target_delay.c,v 1.2.4.2 2020/04/08 14:08:03 martin Exp $"); 34 1.2.4.2 martin 35 1.2.4.2 martin #include <sys/types.h> 36 1.2.4.2 martin #include <sys/param.h> 37 1.2.4.2 martin #include <sys/kernel.h> 38 1.2.4.2 martin #include <sys/buf.h> 39 1.2.4.2 martin #include <sys/kmem.h> 40 1.2.4.2 martin #include <sys/mutex.h> 41 1.2.4.2 martin #include <sys/queue.h> 42 1.2.4.2 martin #include <sys/callout.h> 43 1.2.4.2 martin #include <sys/pool.h> 44 1.2.4.2 martin #include <sys/kthread.h> 45 1.2.4.2 martin 46 1.2.4.2 martin #include "dm.h" 47 1.2.4.2 martin 48 1.2.4.2 martin struct dm_delay_buf { 49 1.2.4.2 martin TAILQ_ENTRY(dm_delay_buf) entry; 50 1.2.4.2 martin struct buf *bp; 51 1.2.4.2 martin int expire; 52 1.2.4.2 martin }; 53 1.2.4.2 martin TAILQ_HEAD(dm_delay_buf_list, dm_delay_buf); 54 1.2.4.2 martin 55 1.2.4.2 martin struct dm_delay_info { 56 1.2.4.2 martin dm_pdev_t *pdev; 57 1.2.4.2 martin uint64_t offset; 58 1.2.4.2 martin int delay; 59 1.2.4.2 martin int count; 60 1.2.4.2 martin int enabled; 61 1.2.4.2 martin struct dm_delay_buf_list buf_list; 62 1.2.4.2 martin struct callout cal; 63 1.2.4.2 martin kmutex_t buf_mtx; 64 1.2.4.2 martin kmutex_t cal_mtx; 65 1.2.4.2 martin kmutex_t token; /* lwkt_token in DragonFly */ 66 1.2.4.2 martin }; 67 1.2.4.2 martin 68 1.2.4.2 martin typedef struct target_delay_config { 69 1.2.4.2 martin struct dm_delay_info read; 70 1.2.4.2 martin struct dm_delay_info write; 71 1.2.4.2 martin int argc; /* either 3 or 6 */ 72 1.2.4.2 martin } dm_target_delay_config_t; 73 1.2.4.2 martin 74 1.2.4.2 martin static int _init(struct dm_delay_info*, char**); 75 1.2.4.2 martin static int _table(struct dm_delay_info*, char*); 76 1.2.4.2 martin static void _strategy(struct dm_delay_info*, struct buf*); 77 1.2.4.2 martin static __inline void _submit(struct dm_delay_info*, struct buf*); 78 1.2.4.2 martin static void _destroy(struct dm_delay_info*); 79 1.2.4.2 martin static void _timeout(void*); 80 1.2.4.2 martin static void _thread(void*); 81 1.2.4.2 martin static __inline void _debug(struct dm_delay_info*, const char*); 82 1.2.4.2 martin 83 1.2.4.2 martin static struct pool pool; 84 1.2.4.2 martin static bool pool_initialized = false; 85 1.2.4.2 martin 86 1.2.4.2 martin #ifdef DM_TARGET_MODULE 87 1.2.4.2 martin /* 88 1.2.4.2 martin * Every target can be compiled directly to dm driver or as a 89 1.2.4.2 martin * separate module this part of target is used for loading targets 90 1.2.4.2 martin * to dm driver. 91 1.2.4.2 martin * Target can be unloaded from kernel only if there are no users of 92 1.2.4.2 martin * it e.g. there are no devices which uses that target. 93 1.2.4.2 martin */ 94 1.2.4.2 martin #include <sys/kernel.h> 95 1.2.4.2 martin #include <sys/module.h> 96 1.2.4.2 martin 97 1.2.4.2 martin MODULE(MODULE_CLASS_MISC, dm_target_delay, NULL); 98 1.2.4.2 martin 99 1.2.4.2 martin static int 100 1.2.4.2 martin dm_target_delay_modcmd(modcmd_t cmd, void *arg) 101 1.2.4.2 martin { 102 1.2.4.2 martin dm_target_t *dmt; 103 1.2.4.2 martin int r; 104 1.2.4.2 martin 105 1.2.4.2 martin switch (cmd) { 106 1.2.4.2 martin case MODULE_CMD_INIT: 107 1.2.4.2 martin if ((dmt = dm_target_lookup("delay")) != NULL) { 108 1.2.4.2 martin dm_target_unbusy(dmt); 109 1.2.4.2 martin return EEXIST; 110 1.2.4.2 martin } 111 1.2.4.2 martin dmt = dm_target_alloc("delay"); 112 1.2.4.2 martin 113 1.2.4.2 martin dmt->version[0] = 1; 114 1.2.4.2 martin dmt->version[1] = 0; 115 1.2.4.2 martin dmt->version[2] = 0; 116 1.2.4.2 martin dmt->init = &dm_target_delay_init; 117 1.2.4.2 martin dmt->table = &dm_target_delay_table; 118 1.2.4.2 martin dmt->strategy = &dm_target_delay_strategy; 119 1.2.4.2 martin dmt->sync = &dm_target_delay_sync; 120 1.2.4.2 martin dmt->destroy = &dm_target_delay_destroy; 121 1.2.4.2 martin //dmt->upcall = &dm_target_delay_upcall; 122 1.2.4.2 martin dmt->secsize = &dm_target_delay_secsize; 123 1.2.4.2 martin 124 1.2.4.2 martin dm_target_delay_pool_create(); 125 1.2.4.2 martin r = dm_target_insert(dmt); 126 1.2.4.2 martin 127 1.2.4.2 martin break; 128 1.2.4.2 martin 129 1.2.4.2 martin case MODULE_CMD_FINI: 130 1.2.4.2 martin r = dm_target_rem("delay"); 131 1.2.4.2 martin dm_target_delay_pool_destroy(); 132 1.2.4.2 martin break; 133 1.2.4.2 martin 134 1.2.4.2 martin case MODULE_CMD_STAT: 135 1.2.4.2 martin return ENOTTY; 136 1.2.4.2 martin 137 1.2.4.2 martin default: 138 1.2.4.2 martin return ENOTTY; 139 1.2.4.2 martin } 140 1.2.4.2 martin 141 1.2.4.2 martin return r; 142 1.2.4.2 martin } 143 1.2.4.2 martin #endif 144 1.2.4.2 martin 145 1.2.4.2 martin int 146 1.2.4.2 martin dm_target_delay_init(dm_table_entry_t *table_en, int argc, char **argv) 147 1.2.4.2 martin { 148 1.2.4.2 martin dm_target_delay_config_t *tdc; 149 1.2.4.2 martin int ret; 150 1.2.4.2 martin 151 1.2.4.2 martin if (argc != 3 && argc != 6) { 152 1.2.4.2 martin printf("Delay target takes 3 or 6 args, %d given\n", argc); 153 1.2.4.2 martin return EINVAL; 154 1.2.4.2 martin } 155 1.2.4.2 martin 156 1.2.4.2 martin aprint_debug("Delay target init function called: argc=%d\n", argc); 157 1.2.4.2 martin 158 1.2.4.2 martin tdc = kmem_alloc(sizeof(dm_target_delay_config_t), KM_SLEEP); 159 1.2.4.2 martin tdc->argc = argc; 160 1.2.4.2 martin 161 1.2.4.2 martin ret = _init(&tdc->read, argv); 162 1.2.4.2 martin if (ret) { 163 1.2.4.2 martin kmem_free(tdc, sizeof(*tdc)); 164 1.2.4.2 martin return ret; 165 1.2.4.2 martin } 166 1.2.4.2 martin 167 1.2.4.2 martin if (argc == 6) 168 1.2.4.2 martin argv += 3; 169 1.2.4.2 martin 170 1.2.4.2 martin ret = _init(&tdc->write, argv); 171 1.2.4.2 martin if (ret) { 172 1.2.4.2 martin dm_pdev_decr(tdc->read.pdev); 173 1.2.4.2 martin kmem_free(tdc, sizeof(*tdc)); 174 1.2.4.2 martin return ret; 175 1.2.4.2 martin } 176 1.2.4.2 martin 177 1.2.4.2 martin dm_table_add_deps(table_en, tdc->read.pdev); 178 1.2.4.2 martin dm_table_add_deps(table_en, tdc->write.pdev); 179 1.2.4.2 martin 180 1.2.4.2 martin table_en->target_config = tdc; 181 1.2.4.2 martin 182 1.2.4.2 martin return 0; 183 1.2.4.2 martin } 184 1.2.4.2 martin 185 1.2.4.2 martin static int 186 1.2.4.2 martin _init(struct dm_delay_info *di, char **argv) 187 1.2.4.2 martin { 188 1.2.4.2 martin dm_pdev_t *dmp; 189 1.2.4.2 martin int tmp; 190 1.2.4.2 martin 191 1.2.4.2 martin if (argv[0] == NULL) 192 1.2.4.2 martin return EINVAL; 193 1.2.4.2 martin if ((dmp = dm_pdev_insert(argv[0])) == NULL) 194 1.2.4.2 martin return ENOENT; 195 1.2.4.2 martin 196 1.2.4.2 martin di->pdev = dmp; 197 1.2.4.2 martin di->offset = atoi64(argv[1]); 198 1.2.4.2 martin tmp = atoi64(argv[2]); 199 1.2.4.2 martin di->delay = tmp * hz / 1000; 200 1.2.4.2 martin di->count = 0; 201 1.2.4.2 martin 202 1.2.4.2 martin TAILQ_INIT(&di->buf_list); 203 1.2.4.2 martin callout_init(&di->cal, 0); 204 1.2.4.2 martin mutex_init(&di->buf_mtx, MUTEX_DEFAULT, IPL_NONE); 205 1.2.4.2 martin mutex_init(&di->cal_mtx, MUTEX_DEFAULT, IPL_NONE); 206 1.2.4.2 martin mutex_init(&di->token, MUTEX_DEFAULT, IPL_NONE); 207 1.2.4.2 martin 208 1.2.4.2 martin di->enabled = 1; 209 1.2.4.2 martin if (kthread_create(PRI_NONE, 0, NULL, _thread, di, NULL, 210 1.2.4.2 martin "dmdlthread")) { 211 1.2.4.2 martin printf("Failed to create delay target's kthread\n"); 212 1.2.4.2 martin /* XXX cleanup ? */ 213 1.2.4.2 martin return EINVAL; 214 1.2.4.2 martin } 215 1.2.4.2 martin 216 1.2.4.2 martin _debug(di, "init"); 217 1.2.4.2 martin return 0; 218 1.2.4.2 martin } 219 1.2.4.2 martin 220 1.2.4.2 martin char * 221 1.2.4.2 martin dm_target_delay_info(void *target_config) 222 1.2.4.2 martin { 223 1.2.4.2 martin dm_target_delay_config_t *tdc; 224 1.2.4.2 martin char *params; 225 1.2.4.2 martin 226 1.2.4.2 martin tdc = target_config; 227 1.2.4.2 martin KASSERT(tdc != NULL); 228 1.2.4.2 martin 229 1.2.4.2 martin aprint_debug("Delay target info function called\n"); 230 1.2.4.2 martin 231 1.2.4.2 martin params = kmem_alloc(DM_MAX_PARAMS_SIZE, KM_SLEEP); 232 1.2.4.2 martin snprintf(params, DM_MAX_PARAMS_SIZE, "%d %d", tdc->read.count, 233 1.2.4.2 martin tdc->write.count); 234 1.2.4.2 martin 235 1.2.4.2 martin return params; 236 1.2.4.2 martin } 237 1.2.4.2 martin 238 1.2.4.2 martin char * 239 1.2.4.2 martin dm_target_delay_table(void *target_config) 240 1.2.4.2 martin { 241 1.2.4.2 martin dm_target_delay_config_t *tdc; 242 1.2.4.2 martin char *params, *p; 243 1.2.4.2 martin 244 1.2.4.2 martin tdc = target_config; 245 1.2.4.2 martin KASSERT(tdc != NULL); 246 1.2.4.2 martin 247 1.2.4.2 martin aprint_debug("Delay target table function called\n"); 248 1.2.4.2 martin 249 1.2.4.2 martin params = kmem_alloc(DM_MAX_PARAMS_SIZE, KM_SLEEP); 250 1.2.4.2 martin p = params; 251 1.2.4.2 martin p += _table(&tdc->read, p); 252 1.2.4.2 martin if (tdc->argc == 6) { 253 1.2.4.2 martin p += snprintf(p, DM_MAX_PARAMS_SIZE, " "); 254 1.2.4.2 martin _table(&tdc->write, p); 255 1.2.4.2 martin } 256 1.2.4.2 martin 257 1.2.4.2 martin return params; 258 1.2.4.2 martin } 259 1.2.4.2 martin 260 1.2.4.2 martin static int 261 1.2.4.2 martin _table(struct dm_delay_info *di, char *p) 262 1.2.4.2 martin { 263 1.2.4.2 martin 264 1.2.4.2 martin return snprintf(p, DM_MAX_PARAMS_SIZE, "%s %" PRIu64 " %d", 265 1.2.4.2 martin di->pdev->udev_name, di->offset, di->delay); 266 1.2.4.2 martin } 267 1.2.4.2 martin 268 1.2.4.2 martin int 269 1.2.4.2 martin dm_target_delay_strategy(dm_table_entry_t *table_en, struct buf *bp) 270 1.2.4.2 martin { 271 1.2.4.2 martin dm_target_delay_config_t *tdc; 272 1.2.4.2 martin struct dm_delay_info *di; 273 1.2.4.2 martin 274 1.2.4.2 martin tdc = table_en->target_config; 275 1.2.4.2 martin KASSERT(tdc != NULL); 276 1.2.4.2 martin 277 1.2.4.2 martin if (bp->b_flags & B_READ) 278 1.2.4.2 martin di = &tdc->read; 279 1.2.4.2 martin else 280 1.2.4.2 martin di = &tdc->write; 281 1.2.4.2 martin 282 1.2.4.2 martin if (di) { 283 1.2.4.2 martin if (di->delay) { 284 1.2.4.2 martin _strategy(di, bp); 285 1.2.4.2 martin } else { 286 1.2.4.2 martin _submit(di, bp); 287 1.2.4.2 martin } 288 1.2.4.2 martin } else { 289 1.2.4.2 martin struct vnode *vnode = tdc->write.pdev->pdev_vnode; 290 1.2.4.2 martin KASSERT(0); 291 1.2.4.2 martin VOP_STRATEGY(vnode, bp); 292 1.2.4.2 martin } 293 1.2.4.2 martin 294 1.2.4.2 martin return 0; 295 1.2.4.2 martin } 296 1.2.4.2 martin 297 1.2.4.2 martin static void 298 1.2.4.2 martin _strategy(struct dm_delay_info *di, struct buf *bp) 299 1.2.4.2 martin { 300 1.2.4.2 martin struct dm_delay_buf *dp; 301 1.2.4.2 martin 302 1.2.4.2 martin dp = pool_get(&pool, PR_WAITOK); 303 1.2.4.2 martin dp->bp = bp; 304 1.2.4.2 martin dp->expire = tick + di->delay; 305 1.2.4.2 martin 306 1.2.4.2 martin mutex_enter(&di->buf_mtx); 307 1.2.4.2 martin di->count++; 308 1.2.4.2 martin TAILQ_INSERT_TAIL(&di->buf_list, dp, entry); 309 1.2.4.2 martin mutex_exit(&di->buf_mtx); 310 1.2.4.2 martin 311 1.2.4.2 martin mutex_enter(&di->cal_mtx); 312 1.2.4.2 martin if (!callout_pending(&di->cal)) 313 1.2.4.2 martin callout_reset(&di->cal, di->delay, _timeout, di); 314 1.2.4.2 martin mutex_exit(&di->cal_mtx); 315 1.2.4.2 martin } 316 1.2.4.2 martin 317 1.2.4.2 martin static __inline void 318 1.2.4.2 martin _submit(struct dm_delay_info *di, struct buf *bp) 319 1.2.4.2 martin { 320 1.2.4.2 martin 321 1.2.4.2 martin _debug(di, "submit"); 322 1.2.4.2 martin 323 1.2.4.2 martin bp->b_blkno += di->offset; 324 1.2.4.2 martin VOP_STRATEGY(di->pdev->pdev_vnode, bp); 325 1.2.4.2 martin } 326 1.2.4.2 martin 327 1.2.4.2 martin static void 328 1.2.4.2 martin _submit_queue(struct dm_delay_info *di, int submit_all) 329 1.2.4.2 martin { 330 1.2.4.2 martin struct dm_delay_buf *dp; 331 1.2.4.2 martin struct dm_delay_buf_list tmp_list; 332 1.2.4.2 martin int next = -1; 333 1.2.4.2 martin int reset = 0; 334 1.2.4.2 martin 335 1.2.4.2 martin _debug(di, "submitq"); 336 1.2.4.2 martin TAILQ_INIT(&tmp_list); 337 1.2.4.2 martin 338 1.2.4.2 martin mutex_enter(&di->buf_mtx); 339 1.2.4.2 martin while ((dp = TAILQ_FIRST(&di->buf_list)) != NULL) { 340 1.2.4.2 martin if (submit_all || tick > dp->expire) { 341 1.2.4.2 martin TAILQ_REMOVE(&di->buf_list, dp, entry); 342 1.2.4.2 martin TAILQ_INSERT_TAIL(&tmp_list, dp, entry); 343 1.2.4.2 martin di->count--; 344 1.2.4.2 martin continue; 345 1.2.4.2 martin } 346 1.2.4.2 martin if (reset == 0) { 347 1.2.4.2 martin reset = 1; 348 1.2.4.2 martin next = dp->expire; 349 1.2.4.2 martin } else { 350 1.2.4.2 martin next = lmin(next, dp->expire); 351 1.2.4.2 martin } 352 1.2.4.2 martin } 353 1.2.4.2 martin mutex_exit(&di->buf_mtx); 354 1.2.4.2 martin 355 1.2.4.2 martin if (reset) { 356 1.2.4.2 martin mutex_enter(&di->cal_mtx); 357 1.2.4.2 martin callout_reset(&di->cal, next - tick, _timeout, di); 358 1.2.4.2 martin mutex_exit(&di->cal_mtx); 359 1.2.4.2 martin } 360 1.2.4.2 martin 361 1.2.4.2 martin while ((dp = TAILQ_FIRST(&tmp_list)) != NULL) { 362 1.2.4.2 martin TAILQ_REMOVE(&tmp_list, dp, entry); 363 1.2.4.2 martin _submit(di, dp->bp); 364 1.2.4.2 martin pool_put(&pool, dp); 365 1.2.4.2 martin } 366 1.2.4.2 martin } 367 1.2.4.2 martin 368 1.2.4.2 martin int 369 1.2.4.2 martin dm_target_delay_sync(dm_table_entry_t *table_en) 370 1.2.4.2 martin { 371 1.2.4.2 martin dm_target_delay_config_t *tdc; 372 1.2.4.2 martin int cmd; 373 1.2.4.2 martin 374 1.2.4.2 martin tdc = table_en->target_config; 375 1.2.4.2 martin cmd = 1; 376 1.2.4.2 martin 377 1.2.4.2 martin return VOP_IOCTL(tdc->write.pdev->pdev_vnode, DIOCCACHESYNC, &cmd, 378 1.2.4.2 martin FREAD | FWRITE, kauth_cred_get()); 379 1.2.4.2 martin } 380 1.2.4.2 martin 381 1.2.4.2 martin int 382 1.2.4.2 martin dm_target_delay_destroy(dm_table_entry_t *table_en) 383 1.2.4.2 martin { 384 1.2.4.2 martin dm_target_delay_config_t *tdc; 385 1.2.4.2 martin 386 1.2.4.2 martin tdc = table_en->target_config; 387 1.2.4.2 martin if (tdc == NULL) 388 1.2.4.2 martin goto out; 389 1.2.4.2 martin 390 1.2.4.2 martin _destroy(&tdc->read); 391 1.2.4.2 martin _destroy(&tdc->write); 392 1.2.4.2 martin 393 1.2.4.2 martin kmem_free(tdc, sizeof(*tdc)); 394 1.2.4.2 martin out: 395 1.2.4.2 martin /* Unbusy target so we can unload it */ 396 1.2.4.2 martin dm_target_unbusy(table_en->target); 397 1.2.4.2 martin 398 1.2.4.2 martin return 0; 399 1.2.4.2 martin } 400 1.2.4.2 martin 401 1.2.4.2 martin static void 402 1.2.4.2 martin _destroy(struct dm_delay_info *di) 403 1.2.4.2 martin { 404 1.2.4.2 martin 405 1.2.4.2 martin _debug(di, "destroy"); 406 1.2.4.2 martin 407 1.2.4.2 martin mutex_enter(&di->token); 408 1.2.4.2 martin di->enabled = 0; 409 1.2.4.2 martin 410 1.2.4.2 martin mutex_enter(&di->cal_mtx); 411 1.2.4.2 martin if (callout_pending(&di->cal)) 412 1.2.4.2 martin callout_halt(&di->cal, NULL); 413 1.2.4.2 martin mutex_exit(&di->cal_mtx); 414 1.2.4.2 martin 415 1.2.4.2 martin _submit_queue(di, 1); 416 1.2.4.2 martin mutex_exit(&di->token); 417 1.2.4.2 martin wakeup(di); 418 1.2.4.2 martin /* XXX race here (DragonFly uses lwkt_token instead of mutex) */ 419 1.2.4.2 martin tsleep(&di->enabled, 0, "dmdldestroy", 0); 420 1.2.4.2 martin 421 1.2.4.2 martin mutex_destroy(&di->token); 422 1.2.4.2 martin mutex_destroy(&di->cal_mtx); 423 1.2.4.2 martin mutex_destroy(&di->buf_mtx); 424 1.2.4.2 martin 425 1.2.4.2 martin dm_pdev_decr(di->pdev); 426 1.2.4.2 martin } 427 1.2.4.2 martin 428 1.2.4.2 martin #if 0 429 1.2.4.2 martin int 430 1.2.4.2 martin dm_target_delay_upcall(dm_table_entry_t *table_en, struct buf *bp) 431 1.2.4.2 martin { 432 1.2.4.2 martin 433 1.2.4.2 martin return 0; 434 1.2.4.2 martin } 435 1.2.4.2 martin #endif 436 1.2.4.2 martin 437 1.2.4.2 martin int 438 1.2.4.2 martin dm_target_delay_secsize(dm_table_entry_t *table_en, unsigned int *secsizep) 439 1.2.4.2 martin { 440 1.2.4.2 martin dm_target_delay_config_t *tdc; 441 1.2.4.2 martin unsigned int secsize; 442 1.2.4.2 martin 443 1.2.4.2 martin secsize = 0; 444 1.2.4.2 martin 445 1.2.4.2 martin tdc = table_en->target_config; 446 1.2.4.2 martin if (tdc != NULL) 447 1.2.4.2 martin secsize = tdc->write.pdev->pdev_secsize; 448 1.2.4.2 martin 449 1.2.4.2 martin *secsizep = secsize; 450 1.2.4.2 martin 451 1.2.4.2 martin return 0; 452 1.2.4.2 martin } 453 1.2.4.2 martin 454 1.2.4.2 martin static void 455 1.2.4.2 martin _timeout(void *arg) 456 1.2.4.2 martin { 457 1.2.4.2 martin struct dm_delay_info *di = arg; 458 1.2.4.2 martin 459 1.2.4.2 martin _debug(di, "timeout"); 460 1.2.4.2 martin wakeup(di); 461 1.2.4.2 martin } 462 1.2.4.2 martin 463 1.2.4.2 martin static void 464 1.2.4.2 martin _thread(void *arg) 465 1.2.4.2 martin { 466 1.2.4.2 martin struct dm_delay_info *di = arg; 467 1.2.4.2 martin 468 1.2.4.2 martin _debug(di, "thread init"); 469 1.2.4.2 martin mutex_enter(&di->token); 470 1.2.4.2 martin 471 1.2.4.2 martin while (di->enabled) { 472 1.2.4.2 martin mutex_exit(&di->token); 473 1.2.4.2 martin tsleep(di, 0, "dmdlthread", 0); 474 1.2.4.2 martin _submit_queue(di, 0); 475 1.2.4.2 martin mutex_enter(&di->token); 476 1.2.4.2 martin } 477 1.2.4.2 martin 478 1.2.4.2 martin mutex_exit(&di->token); 479 1.2.4.2 martin wakeup(&di->enabled); 480 1.2.4.2 martin 481 1.2.4.2 martin _debug(di, "thread exit"); 482 1.2.4.2 martin kthread_exit(0); 483 1.2.4.2 martin } 484 1.2.4.2 martin 485 1.2.4.2 martin static __inline void 486 1.2.4.2 martin _debug(struct dm_delay_info *di, const char *msg) 487 1.2.4.2 martin { 488 1.2.4.2 martin 489 1.2.4.2 martin aprint_debug("%-8s: %d pdev=%s offset=%ju delay=%d count=%d\n", 490 1.2.4.2 martin msg, di->enabled, di->pdev->name, (uintmax_t)di->offset, di->delay, 491 1.2.4.2 martin di->count); 492 1.2.4.2 martin } 493 1.2.4.2 martin 494 1.2.4.2 martin void 495 1.2.4.2 martin dm_target_delay_pool_create(void) 496 1.2.4.2 martin { 497 1.2.4.2 martin 498 1.2.4.2 martin if (!pool_initialized) { 499 1.2.4.2 martin pool_init(&pool, sizeof(struct dm_delay_buf), 0, 0, 0, 500 1.2.4.2 martin "dmdlobj", &pool_allocator_nointr, IPL_NONE); 501 1.2.4.2 martin pool_initialized = true; 502 1.2.4.2 martin aprint_debug("Delay target pool initialized\n"); 503 1.2.4.2 martin } 504 1.2.4.2 martin } 505 1.2.4.2 martin 506 1.2.4.2 martin void 507 1.2.4.2 martin dm_target_delay_pool_destroy(void) 508 1.2.4.2 martin { 509 1.2.4.2 martin 510 1.2.4.2 martin if (pool_initialized) { 511 1.2.4.2 martin pool_destroy(&pool); 512 1.2.4.2 martin pool_initialized = false; 513 1.2.4.2 martin aprint_debug("Delay target pool destroyed\n"); 514 1.2.4.2 martin } 515 1.2.4.2 martin } 516
Indexes created Thu Oct 02 14:10:14 GMT 2025