udf_strat_direct.c revision 1.1.8.1
1 /* $NetBSD: udf_strat_direct.c,v 1.1.8.1 2008/07/18 16:37:48 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __KERNEL_RCSID(0, "$NetBSD: udf_strat_direct.c,v 1.1.8.1 2008/07/18 16:37:48 simonb Exp $"); 32 #endif /* not lint */ 33 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_quota.h" 37 #include "opt_compat_netbsd.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/sysctl.h> 43 #include <sys/namei.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <miscfs/genfs/genfs_node.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/file.h> 51 #include <sys/device.h> 52 #include <sys/disklabel.h> 53 #include <sys/ioctl.h> 54 #include <sys/malloc.h> 55 #include <sys/dirent.h> 56 #include <sys/stat.h> 57 #include <sys/conf.h> 58 #include <sys/kauth.h> 59 #include <sys/kthread.h> 60 #include <dev/clock_subr.h> 61 62 #include <fs/udf/ecma167-udf.h> 63 #include <fs/udf/udf_mount.h> 64 65 #if defined(_KERNEL_OPT) 66 #include "opt_udf.h" 67 #endif 68 69 #include "udf.h" 70 #include "udf_subr.h" 71 #include "udf_bswap.h" 72 73 74 #define VTOI(vnode) ((struct udf_node *) vnode->v_data) 75 #define PRIV(ump) ((struct strat_private *) ump->strategy_private) 76 77 /* --------------------------------------------------------------------- */ 78 79 /* BUFQ's */ 80 #define UDF_SHED_MAX 3 81 82 #define UDF_SHED_READING 0 83 #define UDF_SHED_WRITING 1 84 #define UDF_SHED_SEQWRITING 2 85 86 87 struct strat_private { 88 struct pool desc_pool; /* node descriptors */ 89 }; 90 91 /* --------------------------------------------------------------------- */ 92 93 static void 94 udf_wr_nodedscr_callback(struct buf *buf) 95 { 96 struct udf_node *udf_node; 97 98 KASSERT(buf); 99 KASSERT(buf->b_data); 100 101 /* called when write action is done */ 102 DPRINTF(WRITE, ("udf_wr_nodedscr_callback(): node written out\n")); 103 104 udf_node = VTOI(buf->b_vp); 105 if (udf_node == NULL) { 106 putiobuf(buf); 107 printf("udf_wr_node_callback: NULL node?\n"); 108 return; 109 } 110 111 /* XXX right flags to mark dirty again on error? */ 112 if (buf->b_error) { 113 /* write error on `defect free' media??? how to solve? */ 114 /* XXX lookup UDF standard for unallocatable space */ 115 udf_node->i_flags |= IN_MODIFIED | IN_ACCESSED; 116 } 117 118 /* decrement outstanding_nodedscr */ 119 KASSERT(udf_node->outstanding_nodedscr >= 1); 120 udf_node->outstanding_nodedscr--; 121 if (udf_node->outstanding_nodedscr == 0) { 122 /* unlock the node */ 123 KASSERT(udf_node->i_flags & IN_CALLBACK_ULK); 124 UDF_UNLOCK_NODE(udf_node, IN_CALLBACK_ULK); 125 126 wakeup(&udf_node->outstanding_nodedscr); 127 } 128 /* unreference the vnode so it can be recycled */ 129 holdrele(udf_node->vnode); 130 131 putiobuf(buf); 132 } 133 134 /* --------------------------------------------------------------------- */ 135 136 static int 137 udf_getblank_nodedscr_direct(struct udf_strat_args *args) 138 { 139 union dscrptr **dscrptr = &args->dscr; 140 struct udf_mount *ump = args->ump; 141 struct strat_private *priv = PRIV(ump); 142 uint32_t lb_size; 143 144 lb_size = udf_rw32(ump->logical_vol->lb_size); 145 *dscrptr = pool_get(&priv->desc_pool, PR_WAITOK); 146 memset(*dscrptr, 0, lb_size); 147 148 return 0; 149 } 150 151 152 static void 153 udf_free_nodedscr_direct(struct udf_strat_args *args) 154 { 155 union dscrptr *dscr = args->dscr; 156 struct udf_mount *ump = args->ump; 157 struct strat_private *priv = PRIV(ump); 158 159 pool_put(&priv->desc_pool, dscr); 160 } 161 162 163 static int 164 udf_read_nodedscr_direct(struct udf_strat_args *args) 165 { 166 union dscrptr **dscrptr = &args->dscr; 167 union dscrptr *tmpdscr; 168 struct udf_mount *ump = args->ump; 169 struct long_ad *icb = args->icb; 170 struct strat_private *priv = PRIV(ump); 171 uint32_t lb_size; 172 uint32_t sector, dummy; 173 int error; 174 175 lb_size = udf_rw32(ump->logical_vol->lb_size); 176 177 error = udf_translate_vtop(ump, icb, §or, &dummy); 178 if (error) 179 return error; 180 181 /* try to read in fe/efe */ 182 error = udf_read_phys_dscr(ump, sector, M_UDFTEMP, &tmpdscr); 183 if (error) 184 return error; 185 186 *dscrptr = pool_get(&priv->desc_pool, PR_WAITOK); 187 memcpy(*dscrptr, tmpdscr, lb_size); 188 free(tmpdscr, M_UDFTEMP); 189 190 return 0; 191 } 192 193 194 static int 195 udf_write_nodedscr_direct(struct udf_strat_args *args) 196 { 197 struct udf_mount *ump = args->ump; 198 struct udf_node *udf_node = args->udf_node; 199 union dscrptr *dscr = args->dscr; 200 struct long_ad *icb = args->icb; 201 int waitfor = args->waitfor; 202 uint32_t logsector, sector, dummy; 203 int error, vpart; 204 205 /* 206 * we have to decide if we write it out sequential or at its fixed 207 * position by examining the partition its (to be) written on. 208 */ 209 vpart = udf_rw16(udf_node->loc.loc.part_num); 210 logsector = udf_rw32(icb->loc.lb_num); 211 KASSERT(ump->vtop_tp[vpart] != UDF_VTOP_TYPE_VIRT); 212 213 sector = 0; 214 error = udf_translate_vtop(ump, icb, §or, &dummy); 215 if (error) 216 goto out; 217 218 /* add reference to the vnode to prevent recycling */ 219 vhold(udf_node->vnode); 220 221 if (waitfor) { 222 DPRINTF(WRITE, ("udf_write_nodedscr: sync write\n")); 223 224 error = udf_write_phys_dscr_sync(ump, udf_node, UDF_C_NODE, 225 dscr, sector, logsector); 226 } else { 227 DPRINTF(WRITE, ("udf_write_nodedscr: no wait, async write\n")); 228 229 error = udf_write_phys_dscr_async(ump, udf_node, UDF_C_NODE, 230 dscr, sector, logsector, udf_wr_nodedscr_callback); 231 /* will be UNLOCKED in call back */ 232 return error; 233 } 234 235 holdrele(udf_node->vnode); 236 out: 237 udf_node->outstanding_nodedscr--; 238 if (udf_node->outstanding_nodedscr == 0) { 239 UDF_UNLOCK_NODE(udf_node, 0); 240 wakeup(&udf_node->outstanding_nodedscr); 241 } 242 243 return error; 244 } 245 246 /* --------------------------------------------------------------------- */ 247 248 static void 249 udf_queue_buf_direct(struct udf_strat_args *args) 250 { 251 struct udf_mount *ump = args->ump; 252 struct buf *buf = args->nestbuf; 253 struct buf *nestbuf; 254 struct long_ad *node_ad_cpy; 255 uint64_t *lmapping, *pmapping, *lmappos, blknr, run_start; 256 uint32_t our_sectornr, sectornr; 257 uint32_t lb_size, buf_offset, rbuflen, bpos; 258 uint8_t *fidblk; 259 off_t rblk; 260 int sector_size = ump->discinfo.sector_size; 261 int blks = sector_size / DEV_BSIZE; 262 int len, buf_len, sector, sectors, run_length; 263 int what, class, queue; 264 265 KASSERT(ump); 266 KASSERT(buf); 267 KASSERT(buf->b_iodone == nestiobuf_iodone); 268 269 what = buf->b_udf_c_type; 270 queue = UDF_SHED_READING; 271 if ((buf->b_flags & B_READ) == 0) { 272 /* writing */ 273 queue = UDF_SHED_SEQWRITING; 274 if (what == UDF_C_DSCR) 275 queue = UDF_SHED_WRITING; 276 if (what == UDF_C_NODE) 277 queue = UDF_SHED_WRITING; 278 } 279 280 /* use disc sheduler */ 281 class = ump->discinfo.mmc_class; 282 KASSERT((class == MMC_CLASS_UNKN) || (class == MMC_CLASS_DISC) || 283 (ump->discinfo.mmc_cur & MMC_CAP_HW_DEFECTFREE)); 284 285 if (queue == UDF_SHED_READING) { 286 DPRINTF(SHEDULE, ("\nudf_issue_buf READ %p : sector %d type %d," 287 "b_resid %d, b_bcount %d, b_bufsize %d\n", 288 buf, (uint32_t) buf->b_blkno / blks, buf->b_udf_c_type, 289 buf->b_resid, buf->b_bcount, buf->b_bufsize)); 290 VOP_STRATEGY(ump->devvp, buf); 291 return; 292 } 293 294 /* (sectorsize == lb_size) for UDF */ 295 lb_size = udf_rw32(ump->logical_vol->lb_size); 296 blknr = buf->b_blkno; 297 our_sectornr = blknr / blks; 298 299 if (queue == UDF_SHED_WRITING) { 300 DPRINTF(SHEDULE, ("\nudf_issue_buf WRITE %p : sector %d " 301 "type %d, b_resid %d, b_bcount %d, b_bufsize %d\n", 302 buf, (uint32_t) buf->b_blkno / blks, buf->b_udf_c_type, 303 buf->b_resid, buf->b_bcount, buf->b_bufsize)); 304 /* if we have FIDs fixup using buffer's sector number(s) */ 305 if (buf->b_udf_c_type == UDF_C_FIDS) { 306 panic("UDF_C_FIDS in SHED_WRITING!\n"); 307 buf_len = buf->b_bcount; 308 sectornr = our_sectornr; 309 bpos = 0; 310 while (buf_len) { 311 len = MIN(buf_len, sector_size); 312 fidblk = (uint8_t *) buf->b_data + bpos; 313 udf_fixup_fid_block(fidblk, sector_size, 314 0, len, sectornr); 315 sectornr++; 316 bpos += len; 317 buf_len -= len; 318 } 319 } 320 udf_fixup_node_internals(ump, buf->b_data, buf->b_udf_c_type); 321 VOP_STRATEGY(ump->devvp, buf); 322 return; 323 } 324 325 /* UDF_SHED_SEQWRITING */ 326 KASSERT(queue == UDF_SHED_SEQWRITING); 327 DPRINTF(SHEDULE, ("\nudf_issue_buf SEQWRITE %p : sector XXXX " 328 "type %d, b_resid %d, b_bcount %d, b_bufsize %d\n", 329 buf, buf->b_udf_c_type, buf->b_resid, buf->b_bcount, 330 buf->b_bufsize)); 331 332 /* 333 * Buffers should not have been allocated to disc addresses yet on 334 * this queue. Note that a buffer can get multiple extents allocated. 335 * 336 * lmapping contains lb_num relative to base partition. 337 * pmapping contains lb_num as used for disc adressing. 338 */ 339 lmapping = ump->la_lmapping; 340 pmapping = ump->la_pmapping; 341 node_ad_cpy = ump->la_node_ad_cpy; 342 343 /* write physical blocknr in buf and get its mappings */ 344 udf_late_allocate_buf(ump, buf, lmapping, pmapping, node_ad_cpy); 345 346 /* if we have FIDs, fixup using the new allocation table */ 347 if (buf->b_udf_c_type == UDF_C_FIDS) { 348 buf_len = buf->b_bcount; 349 bpos = 0; 350 lmappos = lmapping; 351 while (buf_len) { 352 sectornr = *lmappos++; 353 len = MIN(buf_len, sector_size); 354 fidblk = (uint8_t *) buf->b_data + bpos; 355 udf_fixup_fid_block(fidblk, sector_size, 356 0, len, sectornr); 357 bpos += len; 358 buf_len -= len; 359 } 360 } 361 udf_fixup_node_internals(ump, buf->b_data, buf->b_udf_c_type); 362 363 /* speed up : try to conglomerate as many writes in one go */ 364 sectors = (buf->b_bcount + sector_size -1) / sector_size; 365 for (sector = 0; sector < sectors; sector++) { 366 buf_offset = sector * sector_size; 367 DPRINTF(WRITE, ("\tprocessing rel sector %d\n", sector)); 368 369 DPRINTF(WRITE, ("\tissue write sector %"PRIu64"\n", 370 pmapping[sector])); 371 372 run_start = pmapping[sector]; 373 run_length = 1; 374 while (sector < sectors-1) { 375 if (pmapping[sector+1] != pmapping[sector]+1) 376 break; 377 run_length++; 378 sector++; 379 } 380 381 /* nest an iobuf for the extent */ 382 rbuflen = run_length * sector_size; 383 rblk = run_start * (sector_size/DEV_BSIZE); 384 385 nestbuf = getiobuf(NULL, true); 386 nestiobuf_setup(buf, nestbuf, buf_offset, rbuflen); 387 /* nestbuf is B_ASYNC */ 388 389 /* identify this nestbuf */ 390 nestbuf->b_lblkno = sector; 391 assert(nestbuf->b_vp == buf->b_vp); 392 393 /* CD shedules on raw blkno */ 394 nestbuf->b_blkno = rblk; 395 nestbuf->b_proc = NULL; 396 nestbuf->b_rawblkno = rblk; 397 nestbuf->b_udf_c_type = UDF_C_PROCESSED; 398 399 VOP_STRATEGY(ump->devvp, nestbuf); 400 } 401 } 402 403 404 static void 405 udf_discstrat_init_direct(struct udf_strat_args *args) 406 { 407 struct udf_mount *ump = args->ump; 408 struct strat_private *priv = PRIV(ump); 409 uint32_t lb_size; 410 411 KASSERT(priv == NULL); 412 ump->strategy_private = malloc(sizeof(struct strat_private), 413 M_UDFTEMP, M_WAITOK); 414 priv = ump->strategy_private; 415 memset(priv, 0 , sizeof(struct strat_private)); 416 417 /* 418 * Initialise pool for descriptors associated with nodes. This is done 419 * in lb_size units though currently lb_size is dictated to be 420 * sector_size. 421 */ 422 memset(&priv->desc_pool, 0, sizeof(struct pool)); 423 424 lb_size = udf_rw32(ump->logical_vol->lb_size); 425 pool_init(&priv->desc_pool, lb_size, 0, 0, 0, "udf_desc_pool", NULL, 426 IPL_NONE); 427 } 428 429 430 static void 431 udf_discstrat_finish_direct(struct udf_strat_args *args) 432 { 433 struct udf_mount *ump = args->ump; 434 struct strat_private *priv = PRIV(ump); 435 436 /* destroy our pool */ 437 pool_destroy(&priv->desc_pool); 438 439 /* free our private space */ 440 free(ump->strategy_private, M_UDFTEMP); 441 ump->strategy_private = NULL; 442 } 443 444 /* --------------------------------------------------------------------- */ 445 446 struct udf_strategy udf_strat_direct = 447 { 448 udf_getblank_nodedscr_direct, 449 udf_free_nodedscr_direct, 450 udf_read_nodedscr_direct, 451 udf_write_nodedscr_direct, 452 udf_queue_buf_direct, 453 udf_discstrat_init_direct, 454 udf_discstrat_finish_direct 455 }; 456 457
Indexes created Fri Oct 03 02:09:57 GMT 2025