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