1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #include <linux/sched.h> 11 #include <linux/slab.h> 12 #include <linux/spinlock.h> 13 #include <linux/completion.h> 14 #include <linux/buffer_head.h> 15 #include <linux/gfs2_ondisk.h> 16 #include <linux/bio.h> 17 #include <linux/fs.h> 18 19 #include "gfs2.h" 20 #include "incore.h" 21 #include "inode.h" 22 #include "glock.h" 23 #include "log.h" 24 #include "lops.h" 25 #include "meta_io.h" 26 #include "recovery.h" 27 #include "rgrp.h" 28 #include "trans.h" 29 #include "util.h" 30 #include "trace_gfs2.h" 31 32 /** 33 * gfs2_pin - Pin a buffer in memory 34 * @sdp: The superblock 35 * @bh: The buffer to be pinned 36 * 37 * The log lock must be held when calling this function 38 */ 39 static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 40 { 41 struct gfs2_bufdata *bd; 42 43 gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); 44 45 clear_buffer_dirty(bh); 46 if (test_set_buffer_pinned(bh)) 47 gfs2_assert_withdraw(sdp, 0); 48 if (!buffer_uptodate(bh)) 49 gfs2_io_error_bh(sdp, bh); 50 bd = bh->b_private; 51 /* If this buffer is in the AIL and it has already been written 52 * to in-place disk block, remove it from the AIL. 53 */ 54 spin_lock(&sdp->sd_ail_lock); 55 if (bd->bd_ail) 56 list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); 57 spin_unlock(&sdp->sd_ail_lock); 58 get_bh(bh); 59 atomic_inc(&sdp->sd_log_pinned); 60 trace_gfs2_pin(bd, 1); 61 } 62 63 /** 64 * gfs2_unpin - Unpin a buffer 65 * @sdp: the filesystem the buffer belongs to 66 * @bh: The buffer to unpin 67 * @ai: 68 * 69 */ 70 71 static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 72 struct gfs2_ail *ai) 73 { 74 struct gfs2_bufdata *bd = bh->b_private; 75 76 gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); 77 78 if (!buffer_pinned(bh)) 79 gfs2_assert_withdraw(sdp, 0); 80 81 lock_buffer(bh); 82 mark_buffer_dirty(bh); 83 clear_buffer_pinned(bh); 84 85 spin_lock(&sdp->sd_ail_lock); 86 if (bd->bd_ail) { 87 list_del(&bd->bd_ail_st_list); 88 brelse(bh); 89 } else { 90 struct gfs2_glock *gl = bd->bd_gl; 91 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 92 atomic_inc(&gl->gl_ail_count); 93 } 94 bd->bd_ail = ai; 95 list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); 96 spin_unlock(&sdp->sd_ail_lock); 97 98 if (test_and_clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags)) 99 gfs2_glock_schedule_for_reclaim(bd->bd_gl); 100 trace_gfs2_pin(bd, 0); 101 unlock_buffer(bh); 102 atomic_dec(&sdp->sd_log_pinned); 103 } 104 105 106 static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh) 107 { 108 return (struct gfs2_log_descriptor *)bh->b_data; 109 } 110 111 static inline __be64 *bh_log_ptr(struct buffer_head *bh) 112 { 113 struct gfs2_log_descriptor *ld = bh_log_desc(bh); 114 return (__force __be64 *)(ld + 1); 115 } 116 117 static inline __be64 *bh_ptr_end(struct buffer_head *bh) 118 { 119 return (__force __be64 *)(bh->b_data + bh->b_size); 120 } 121 122 123 static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) 124 { 125 struct buffer_head *bh = gfs2_log_get_buf(sdp); 126 struct gfs2_log_descriptor *ld = bh_log_desc(bh); 127 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 128 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 129 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 130 ld->ld_type = cpu_to_be32(ld_type); 131 ld->ld_length = 0; 132 ld->ld_data1 = 0; 133 ld->ld_data2 = 0; 134 memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); 135 return bh; 136 } 137 138 static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 139 { 140 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 141 struct gfs2_meta_header *mh; 142 struct gfs2_trans *tr; 143 144 lock_buffer(bd->bd_bh); 145 gfs2_log_lock(sdp); 146 if (!list_empty(&bd->bd_list_tr)) 147 goto out; 148 tr = current->journal_info; 149 tr->tr_touched = 1; 150 tr->tr_num_buf++; 151 list_add(&bd->bd_list_tr, &tr->tr_list_buf); 152 if (!list_empty(&le->le_list)) 153 goto out; 154 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 155 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 156 gfs2_meta_check(sdp, bd->bd_bh); 157 gfs2_pin(sdp, bd->bd_bh); 158 mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; 159 mh->__pad0 = cpu_to_be64(0); 160 mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); 161 sdp->sd_log_num_buf++; 162 list_add(&le->le_list, &sdp->sd_log_le_buf); 163 tr->tr_num_buf_new++; 164 out: 165 gfs2_log_unlock(sdp); 166 unlock_buffer(bd->bd_bh); 167 } 168 169 static void buf_lo_before_commit(struct gfs2_sbd *sdp) 170 { 171 struct buffer_head *bh; 172 struct gfs2_log_descriptor *ld; 173 struct gfs2_bufdata *bd1 = NULL, *bd2; 174 unsigned int total; 175 unsigned int limit; 176 unsigned int num; 177 unsigned n; 178 __be64 *ptr; 179 180 limit = buf_limit(sdp); 181 /* for 4k blocks, limit = 503 */ 182 183 gfs2_log_lock(sdp); 184 total = sdp->sd_log_num_buf; 185 bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); 186 while(total) { 187 num = total; 188 if (total > limit) 189 num = limit; 190 gfs2_log_unlock(sdp); 191 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); 192 gfs2_log_lock(sdp); 193 ld = bh_log_desc(bh); 194 ptr = bh_log_ptr(bh); 195 ld->ld_length = cpu_to_be32(num + 1); 196 ld->ld_data1 = cpu_to_be32(num); 197 198 n = 0; 199 list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, 200 bd_le.le_list) { 201 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 202 if (++n >= num) 203 break; 204 } 205 206 gfs2_log_unlock(sdp); 207 submit_bh(WRITE_SYNC_PLUG, bh); 208 gfs2_log_lock(sdp); 209 210 n = 0; 211 list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, 212 bd_le.le_list) { 213 get_bh(bd2->bd_bh); 214 gfs2_log_unlock(sdp); 215 lock_buffer(bd2->bd_bh); 216 bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); 217 submit_bh(WRITE_SYNC_PLUG, bh); 218 gfs2_log_lock(sdp); 219 if (++n >= num) 220 break; 221 } 222 223 BUG_ON(total < num); 224 total -= num; 225 } 226 gfs2_log_unlock(sdp); 227 } 228 229 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 230 { 231 struct list_head *head = &sdp->sd_log_le_buf; 232 struct gfs2_bufdata *bd; 233 234 while (!list_empty(head)) { 235 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 236 list_del_init(&bd->bd_le.le_list); 237 sdp->sd_log_num_buf--; 238 239 gfs2_unpin(sdp, bd->bd_bh, ai); 240 } 241 gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 242 } 243 244 static void buf_lo_before_scan(struct gfs2_jdesc *jd, 245 struct gfs2_log_header_host *head, int pass) 246 { 247 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 248 249 if (pass != 0) 250 return; 251 252 sdp->sd_found_blocks = 0; 253 sdp->sd_replayed_blocks = 0; 254 } 255 256 static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 257 struct gfs2_log_descriptor *ld, __be64 *ptr, 258 int pass) 259 { 260 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 261 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 262 struct gfs2_glock *gl = ip->i_gl; 263 unsigned int blks = be32_to_cpu(ld->ld_data1); 264 struct buffer_head *bh_log, *bh_ip; 265 u64 blkno; 266 int error = 0; 267 268 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 269 return 0; 270 271 gfs2_replay_incr_blk(sdp, &start); 272 273 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 274 blkno = be64_to_cpu(*ptr++); 275 276 sdp->sd_found_blocks++; 277 278 if (gfs2_revoke_check(sdp, blkno, start)) 279 continue; 280 281 error = gfs2_replay_read_block(jd, start, &bh_log); 282 if (error) 283 return error; 284 285 bh_ip = gfs2_meta_new(gl, blkno); 286 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 287 288 if (gfs2_meta_check(sdp, bh_ip)) 289 error = -EIO; 290 else 291 mark_buffer_dirty(bh_ip); 292 293 brelse(bh_log); 294 brelse(bh_ip); 295 296 if (error) 297 break; 298 299 sdp->sd_replayed_blocks++; 300 } 301 302 return error; 303 } 304 305 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 306 { 307 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 308 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 309 310 if (error) { 311 gfs2_meta_sync(ip->i_gl); 312 return; 313 } 314 if (pass != 1) 315 return; 316 317 gfs2_meta_sync(ip->i_gl); 318 319 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 320 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 321 } 322 323 static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 324 { 325 struct gfs2_trans *tr; 326 327 tr = current->journal_info; 328 tr->tr_touched = 1; 329 tr->tr_num_revoke++; 330 sdp->sd_log_num_revoke++; 331 list_add(&le->le_list, &sdp->sd_log_le_revoke); 332 } 333 334 static void revoke_lo_before_commit(struct gfs2_sbd *sdp) 335 { 336 struct gfs2_log_descriptor *ld; 337 struct gfs2_meta_header *mh; 338 struct buffer_head *bh; 339 unsigned int offset; 340 struct list_head *head = &sdp->sd_log_le_revoke; 341 struct gfs2_bufdata *bd; 342 343 if (!sdp->sd_log_num_revoke) 344 return; 345 346 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); 347 ld = bh_log_desc(bh); 348 ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, 349 sizeof(u64))); 350 ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); 351 offset = sizeof(struct gfs2_log_descriptor); 352 353 while (!list_empty(head)) { 354 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 355 list_del_init(&bd->bd_le.le_list); 356 sdp->sd_log_num_revoke--; 357 358 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 359 submit_bh(WRITE_SYNC_PLUG, bh); 360 361 bh = gfs2_log_get_buf(sdp); 362 mh = (struct gfs2_meta_header *)bh->b_data; 363 mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 364 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 365 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 366 offset = sizeof(struct gfs2_meta_header); 367 } 368 369 *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno); 370 kmem_cache_free(gfs2_bufdata_cachep, bd); 371 372 offset += sizeof(u64); 373 } 374 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 375 376 submit_bh(WRITE_SYNC_PLUG, bh); 377 } 378 379 static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 380 struct gfs2_log_header_host *head, int pass) 381 { 382 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 383 384 if (pass != 0) 385 return; 386 387 sdp->sd_found_revokes = 0; 388 sdp->sd_replay_tail = head->lh_tail; 389 } 390 391 static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 392 struct gfs2_log_descriptor *ld, __be64 *ptr, 393 int pass) 394 { 395 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 396 unsigned int blks = be32_to_cpu(ld->ld_length); 397 unsigned int revokes = be32_to_cpu(ld->ld_data1); 398 struct buffer_head *bh; 399 unsigned int offset; 400 u64 blkno; 401 int first = 1; 402 int error; 403 404 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 405 return 0; 406 407 offset = sizeof(struct gfs2_log_descriptor); 408 409 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 410 error = gfs2_replay_read_block(jd, start, &bh); 411 if (error) 412 return error; 413 414 if (!first) 415 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 416 417 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 418 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 419 420 error = gfs2_revoke_add(sdp, blkno, start); 421 if (error < 0) { 422 brelse(bh); 423 return error; 424 } 425 else if (error) 426 sdp->sd_found_revokes++; 427 428 if (!--revokes) 429 break; 430 offset += sizeof(u64); 431 } 432 433 brelse(bh); 434 offset = sizeof(struct gfs2_meta_header); 435 first = 0; 436 } 437 438 return 0; 439 } 440 441 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 442 { 443 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 444 445 if (error) { 446 gfs2_revoke_clean(sdp); 447 return; 448 } 449 if (pass != 1) 450 return; 451 452 fs_info(sdp, "jid=%u: Found %u revoke tags\n", 453 jd->jd_jid, sdp->sd_found_revokes); 454 455 gfs2_revoke_clean(sdp); 456 } 457 458 static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 459 { 460 struct gfs2_rgrpd *rgd; 461 struct gfs2_trans *tr = current->journal_info; 462 463 tr->tr_touched = 1; 464 465 rgd = container_of(le, struct gfs2_rgrpd, rd_le); 466 467 gfs2_log_lock(sdp); 468 if (!list_empty(&le->le_list)){ 469 gfs2_log_unlock(sdp); 470 return; 471 } 472 gfs2_rgrp_bh_hold(rgd); 473 sdp->sd_log_num_rg++; 474 list_add(&le->le_list, &sdp->sd_log_le_rg); 475 gfs2_log_unlock(sdp); 476 } 477 478 static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 479 { 480 struct list_head *head = &sdp->sd_log_le_rg; 481 struct gfs2_rgrpd *rgd; 482 483 while (!list_empty(head)) { 484 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); 485 list_del_init(&rgd->rd_le.le_list); 486 sdp->sd_log_num_rg--; 487 488 gfs2_rgrp_repolish_clones(rgd); 489 gfs2_rgrp_bh_put(rgd); 490 } 491 gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); 492 } 493 494 /** 495 * databuf_lo_add - Add a databuf to the transaction. 496 * 497 * This is used in two distinct cases: 498 * i) In ordered write mode 499 * We put the data buffer on a list so that we can ensure that its 500 * synced to disk at the right time 501 * ii) In journaled data mode 502 * We need to journal the data block in the same way as metadata in 503 * the functions above. The difference is that here we have a tag 504 * which is two __be64's being the block number (as per meta data) 505 * and a flag which says whether the data block needs escaping or 506 * not. This means we need a new log entry for each 251 or so data 507 * blocks, which isn't an enormous overhead but twice as much as 508 * for normal metadata blocks. 509 */ 510 static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 511 { 512 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 513 struct gfs2_trans *tr = current->journal_info; 514 struct address_space *mapping = bd->bd_bh->b_page->mapping; 515 struct gfs2_inode *ip = GFS2_I(mapping->host); 516 517 lock_buffer(bd->bd_bh); 518 gfs2_log_lock(sdp); 519 if (tr) { 520 if (!list_empty(&bd->bd_list_tr)) 521 goto out; 522 tr->tr_touched = 1; 523 if (gfs2_is_jdata(ip)) { 524 tr->tr_num_buf++; 525 list_add(&bd->bd_list_tr, &tr->tr_list_buf); 526 } 527 } 528 if (!list_empty(&le->le_list)) 529 goto out; 530 531 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 532 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 533 if (gfs2_is_jdata(ip)) { 534 gfs2_pin(sdp, bd->bd_bh); 535 tr->tr_num_databuf_new++; 536 sdp->sd_log_num_databuf++; 537 list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); 538 } else { 539 list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); 540 } 541 out: 542 gfs2_log_unlock(sdp); 543 unlock_buffer(bd->bd_bh); 544 } 545 546 static void gfs2_check_magic(struct buffer_head *bh) 547 { 548 void *kaddr; 549 __be32 *ptr; 550 551 clear_buffer_escaped(bh); 552 kaddr = kmap_atomic(bh->b_page, KM_USER0); 553 ptr = kaddr + bh_offset(bh); 554 if (*ptr == cpu_to_be32(GFS2_MAGIC)) 555 set_buffer_escaped(bh); 556 kunmap_atomic(kaddr, KM_USER0); 557 } 558 559 static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh, 560 struct list_head *list, struct list_head *done, 561 unsigned int n) 562 { 563 struct buffer_head *bh1; 564 struct gfs2_log_descriptor *ld; 565 struct gfs2_bufdata *bd; 566 __be64 *ptr; 567 568 if (!bh) 569 return; 570 571 ld = bh_log_desc(bh); 572 ld->ld_length = cpu_to_be32(n + 1); 573 ld->ld_data1 = cpu_to_be32(n); 574 575 ptr = bh_log_ptr(bh); 576 577 get_bh(bh); 578 submit_bh(WRITE_SYNC_PLUG, bh); 579 gfs2_log_lock(sdp); 580 while(!list_empty(list)) { 581 bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); 582 list_move_tail(&bd->bd_le.le_list, done); 583 get_bh(bd->bd_bh); 584 while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) { 585 gfs2_log_incr_head(sdp); 586 ptr += 2; 587 } 588 gfs2_log_unlock(sdp); 589 lock_buffer(bd->bd_bh); 590 if (buffer_escaped(bd->bd_bh)) { 591 void *kaddr; 592 bh1 = gfs2_log_get_buf(sdp); 593 kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0); 594 memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh), 595 bh1->b_size); 596 kunmap_atomic(kaddr, KM_USER0); 597 *(__be32 *)bh1->b_data = 0; 598 clear_buffer_escaped(bd->bd_bh); 599 unlock_buffer(bd->bd_bh); 600 brelse(bd->bd_bh); 601 } else { 602 bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh); 603 } 604 submit_bh(WRITE_SYNC_PLUG, bh1); 605 gfs2_log_lock(sdp); 606 ptr += 2; 607 } 608 gfs2_log_unlock(sdp); 609 brelse(bh); 610 } 611 612 /** 613 * databuf_lo_before_commit - Scan the data buffers, writing as we go 614 * 615 */ 616 617 static void databuf_lo_before_commit(struct gfs2_sbd *sdp) 618 { 619 struct gfs2_bufdata *bd = NULL; 620 struct buffer_head *bh = NULL; 621 unsigned int n = 0; 622 __be64 *ptr = NULL, *end = NULL; 623 LIST_HEAD(processed); 624 LIST_HEAD(in_progress); 625 626 gfs2_log_lock(sdp); 627 while (!list_empty(&sdp->sd_log_le_databuf)) { 628 if (ptr == end) { 629 gfs2_log_unlock(sdp); 630 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); 631 n = 0; 632 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); 633 ptr = bh_log_ptr(bh); 634 end = bh_ptr_end(bh) - 1; 635 gfs2_log_lock(sdp); 636 continue; 637 } 638 bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); 639 list_move_tail(&bd->bd_le.le_list, &in_progress); 640 gfs2_check_magic(bd->bd_bh); 641 *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); 642 *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0); 643 n++; 644 } 645 gfs2_log_unlock(sdp); 646 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); 647 gfs2_log_lock(sdp); 648 list_splice(&processed, &sdp->sd_log_le_databuf); 649 gfs2_log_unlock(sdp); 650 } 651 652 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 653 struct gfs2_log_descriptor *ld, 654 __be64 *ptr, int pass) 655 { 656 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 657 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 658 struct gfs2_glock *gl = ip->i_gl; 659 unsigned int blks = be32_to_cpu(ld->ld_data1); 660 struct buffer_head *bh_log, *bh_ip; 661 u64 blkno; 662 u64 esc; 663 int error = 0; 664 665 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 666 return 0; 667 668 gfs2_replay_incr_blk(sdp, &start); 669 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 670 blkno = be64_to_cpu(*ptr++); 671 esc = be64_to_cpu(*ptr++); 672 673 sdp->sd_found_blocks++; 674 675 if (gfs2_revoke_check(sdp, blkno, start)) 676 continue; 677 678 error = gfs2_replay_read_block(jd, start, &bh_log); 679 if (error) 680 return error; 681 682 bh_ip = gfs2_meta_new(gl, blkno); 683 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 684 685 /* Unescape */ 686 if (esc) { 687 __be32 *eptr = (__be32 *)bh_ip->b_data; 688 *eptr = cpu_to_be32(GFS2_MAGIC); 689 } 690 mark_buffer_dirty(bh_ip); 691 692 brelse(bh_log); 693 brelse(bh_ip); 694 if (error) 695 break; 696 697 sdp->sd_replayed_blocks++; 698 } 699 700 return error; 701 } 702 703 /* FIXME: sort out accounting for log blocks etc. */ 704 705 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 706 { 707 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 708 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 709 710 if (error) { 711 gfs2_meta_sync(ip->i_gl); 712 return; 713 } 714 if (pass != 1) 715 return; 716 717 /* data sync? */ 718 gfs2_meta_sync(ip->i_gl); 719 720 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 721 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 722 } 723 724 static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 725 { 726 struct list_head *head = &sdp->sd_log_le_databuf; 727 struct gfs2_bufdata *bd; 728 729 while (!list_empty(head)) { 730 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 731 list_del_init(&bd->bd_le.le_list); 732 sdp->sd_log_num_databuf--; 733 gfs2_unpin(sdp, bd->bd_bh, ai); 734 } 735 gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 736 } 737 738 739 const struct gfs2_log_operations gfs2_buf_lops = { 740 .lo_add = buf_lo_add, 741 .lo_before_commit = buf_lo_before_commit, 742 .lo_after_commit = buf_lo_after_commit, 743 .lo_before_scan = buf_lo_before_scan, 744 .lo_scan_elements = buf_lo_scan_elements, 745 .lo_after_scan = buf_lo_after_scan, 746 .lo_name = "buf", 747 }; 748 749 const struct gfs2_log_operations gfs2_revoke_lops = { 750 .lo_add = revoke_lo_add, 751 .lo_before_commit = revoke_lo_before_commit, 752 .lo_before_scan = revoke_lo_before_scan, 753 .lo_scan_elements = revoke_lo_scan_elements, 754 .lo_after_scan = revoke_lo_after_scan, 755 .lo_name = "revoke", 756 }; 757 758 const struct gfs2_log_operations gfs2_rg_lops = { 759 .lo_add = rg_lo_add, 760 .lo_after_commit = rg_lo_after_commit, 761 .lo_name = "rg", 762 }; 763 764 const struct gfs2_log_operations gfs2_databuf_lops = { 765 .lo_add = databuf_lo_add, 766 .lo_before_commit = databuf_lo_before_commit, 767 .lo_after_commit = databuf_lo_after_commit, 768 .lo_scan_elements = databuf_lo_scan_elements, 769 .lo_after_scan = databuf_lo_after_scan, 770 .lo_name = "databuf", 771 }; 772 773 const struct gfs2_log_operations *gfs2_log_ops[] = { 774 &gfs2_databuf_lops, 775 &gfs2_buf_lops, 776 &gfs2_rg_lops, 777 &gfs2_revoke_lops, 778 NULL, 779 }; 780 781