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