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