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/mempool.h> 16 #include <linux/gfs2_ondisk.h> 17 #include <linux/bio.h> 18 #include <linux/fs.h> 19 #include <linux/list_sort.h> 20 21 #include "gfs2.h" 22 #include "incore.h" 23 #include "inode.h" 24 #include "glock.h" 25 #include "log.h" 26 #include "lops.h" 27 #include "meta_io.h" 28 #include "recovery.h" 29 #include "rgrp.h" 30 #include "trans.h" 31 #include "util.h" 32 #include "trace_gfs2.h" 33 34 /** 35 * gfs2_pin - Pin a buffer in memory 36 * @sdp: The superblock 37 * @bh: The buffer to be pinned 38 * 39 * The log lock must be held when calling this function 40 */ 41 void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 42 { 43 struct gfs2_bufdata *bd; 44 45 BUG_ON(!current->journal_info); 46 47 clear_buffer_dirty(bh); 48 if (test_set_buffer_pinned(bh)) 49 gfs2_assert_withdraw(sdp, 0); 50 if (!buffer_uptodate(bh)) 51 gfs2_io_error_bh(sdp, bh); 52 bd = bh->b_private; 53 /* If this buffer is in the AIL and it has already been written 54 * to in-place disk block, remove it from the AIL. 55 */ 56 spin_lock(&sdp->sd_ail_lock); 57 if (bd->bd_tr) 58 list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list); 59 spin_unlock(&sdp->sd_ail_lock); 60 get_bh(bh); 61 atomic_inc(&sdp->sd_log_pinned); 62 trace_gfs2_pin(bd, 1); 63 } 64 65 static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) 66 { 67 return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; 68 } 69 70 static void maybe_release_space(struct gfs2_bufdata *bd) 71 { 72 struct gfs2_glock *gl = bd->bd_gl; 73 struct gfs2_sbd *sdp = gl->gl_sbd; 74 struct gfs2_rgrpd *rgd = gl->gl_object; 75 unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; 76 struct gfs2_bitmap *bi = rgd->rd_bits + index; 77 78 if (bi->bi_clone == 0) 79 return; 80 if (sdp->sd_args.ar_discard) 81 gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); 82 memcpy(bi->bi_clone + bi->bi_offset, 83 bd->bd_bh->b_data + bi->bi_offset, bi->bi_len); 84 clear_bit(GBF_FULL, &bi->bi_flags); 85 rgd->rd_free_clone = rgd->rd_free; 86 rgd->rd_extfail_pt = rgd->rd_free; 87 } 88 89 /** 90 * gfs2_unpin - Unpin a buffer 91 * @sdp: the filesystem the buffer belongs to 92 * @bh: The buffer to unpin 93 * @ai: 94 * @flags: The inode dirty flags 95 * 96 */ 97 98 static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 99 struct gfs2_trans *tr) 100 { 101 struct gfs2_bufdata *bd = bh->b_private; 102 103 BUG_ON(!buffer_uptodate(bh)); 104 BUG_ON(!buffer_pinned(bh)); 105 106 lock_buffer(bh); 107 mark_buffer_dirty(bh); 108 clear_buffer_pinned(bh); 109 110 if (buffer_is_rgrp(bd)) 111 maybe_release_space(bd); 112 113 spin_lock(&sdp->sd_ail_lock); 114 if (bd->bd_tr) { 115 list_del(&bd->bd_ail_st_list); 116 brelse(bh); 117 } else { 118 struct gfs2_glock *gl = bd->bd_gl; 119 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 120 atomic_inc(&gl->gl_ail_count); 121 } 122 bd->bd_tr = tr; 123 list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list); 124 spin_unlock(&sdp->sd_ail_lock); 125 126 clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 127 trace_gfs2_pin(bd, 0); 128 unlock_buffer(bh); 129 atomic_dec(&sdp->sd_log_pinned); 130 } 131 132 static void gfs2_log_incr_head(struct gfs2_sbd *sdp) 133 { 134 BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && 135 (sdp->sd_log_flush_head != sdp->sd_log_head)); 136 137 if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { 138 sdp->sd_log_flush_head = 0; 139 sdp->sd_log_flush_wrapped = 1; 140 } 141 } 142 143 static u64 gfs2_log_bmap(struct gfs2_sbd *sdp) 144 { 145 unsigned int lbn = sdp->sd_log_flush_head; 146 struct gfs2_journal_extent *je; 147 u64 block; 148 149 list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) { 150 if (lbn >= je->lblock && lbn < je->lblock + je->blocks) { 151 block = je->dblock + lbn - je->lblock; 152 gfs2_log_incr_head(sdp); 153 return block; 154 } 155 } 156 157 return -1; 158 } 159 160 /** 161 * gfs2_end_log_write_bh - end log write of pagecache data with buffers 162 * @sdp: The superblock 163 * @bvec: The bio_vec 164 * @error: The i/o status 165 * 166 * This finds the relavent buffers and unlocks then and sets the 167 * error flag according to the status of the i/o request. This is 168 * used when the log is writing data which has an in-place version 169 * that is pinned in the pagecache. 170 */ 171 172 static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec, 173 int error) 174 { 175 struct buffer_head *bh, *next; 176 struct page *page = bvec->bv_page; 177 unsigned size; 178 179 bh = page_buffers(page); 180 size = bvec->bv_len; 181 while (bh_offset(bh) < bvec->bv_offset) 182 bh = bh->b_this_page; 183 do { 184 if (error) 185 set_buffer_write_io_error(bh); 186 unlock_buffer(bh); 187 next = bh->b_this_page; 188 size -= bh->b_size; 189 brelse(bh); 190 bh = next; 191 } while(bh && size); 192 } 193 194 /** 195 * gfs2_end_log_write - end of i/o to the log 196 * @bio: The bio 197 * @error: Status of i/o request 198 * 199 * Each bio_vec contains either data from the pagecache or data 200 * relating to the log itself. Here we iterate over the bio_vec 201 * array, processing both kinds of data. 202 * 203 */ 204 205 static void gfs2_end_log_write(struct bio *bio, int error) 206 { 207 struct gfs2_sbd *sdp = bio->bi_private; 208 struct bio_vec *bvec; 209 struct page *page; 210 int i; 211 212 if (error) { 213 sdp->sd_log_error = error; 214 fs_err(sdp, "Error %d writing to log\n", error); 215 } 216 217 bio_for_each_segment_all(bvec, bio, i) { 218 page = bvec->bv_page; 219 if (page_has_buffers(page)) 220 gfs2_end_log_write_bh(sdp, bvec, error); 221 else 222 mempool_free(page, gfs2_page_pool); 223 } 224 225 bio_put(bio); 226 if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 227 wake_up(&sdp->sd_log_flush_wait); 228 } 229 230 /** 231 * gfs2_log_flush_bio - Submit any pending log bio 232 * @sdp: The superblock 233 * @rw: The rw flags 234 * 235 * Submit any pending part-built or full bio to the block device. If 236 * there is no pending bio, then this is a no-op. 237 */ 238 239 void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw) 240 { 241 if (sdp->sd_log_bio) { 242 atomic_inc(&sdp->sd_log_in_flight); 243 submit_bio(rw, sdp->sd_log_bio); 244 sdp->sd_log_bio = NULL; 245 } 246 } 247 248 /** 249 * gfs2_log_alloc_bio - Allocate a new bio for log writing 250 * @sdp: The superblock 251 * @blkno: The next device block number we want to write to 252 * 253 * This should never be called when there is a cached bio in the 254 * super block. When it returns, there will be a cached bio in the 255 * super block which will have as many bio_vecs as the device is 256 * happy to handle. 257 * 258 * Returns: Newly allocated bio 259 */ 260 261 static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno) 262 { 263 struct super_block *sb = sdp->sd_vfs; 264 unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev); 265 struct bio *bio; 266 267 BUG_ON(sdp->sd_log_bio); 268 269 while (1) { 270 bio = bio_alloc(GFP_NOIO, nrvecs); 271 if (likely(bio)) 272 break; 273 nrvecs = max(nrvecs/2, 1U); 274 } 275 276 bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9); 277 bio->bi_bdev = sb->s_bdev; 278 bio->bi_end_io = gfs2_end_log_write; 279 bio->bi_private = sdp; 280 281 sdp->sd_log_bio = bio; 282 283 return bio; 284 } 285 286 /** 287 * gfs2_log_get_bio - Get cached log bio, or allocate a new one 288 * @sdp: The superblock 289 * @blkno: The device block number we want to write to 290 * 291 * If there is a cached bio, then if the next block number is sequential 292 * with the previous one, return it, otherwise flush the bio to the 293 * device. If there is not a cached bio, or we just flushed it, then 294 * allocate a new one. 295 * 296 * Returns: The bio to use for log writes 297 */ 298 299 static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno) 300 { 301 struct bio *bio = sdp->sd_log_bio; 302 u64 nblk; 303 304 if (bio) { 305 nblk = bio_end_sector(bio); 306 nblk >>= sdp->sd_fsb2bb_shift; 307 if (blkno == nblk) 308 return bio; 309 gfs2_log_flush_bio(sdp, WRITE); 310 } 311 312 return gfs2_log_alloc_bio(sdp, blkno); 313 } 314 315 316 /** 317 * gfs2_log_write - write to log 318 * @sdp: the filesystem 319 * @page: the page to write 320 * @size: the size of the data to write 321 * @offset: the offset within the page 322 * 323 * Try and add the page segment to the current bio. If that fails, 324 * submit the current bio to the device and create a new one, and 325 * then add the page segment to that. 326 */ 327 328 static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, 329 unsigned size, unsigned offset) 330 { 331 u64 blkno = gfs2_log_bmap(sdp); 332 struct bio *bio; 333 int ret; 334 335 bio = gfs2_log_get_bio(sdp, blkno); 336 ret = bio_add_page(bio, page, size, offset); 337 if (ret == 0) { 338 gfs2_log_flush_bio(sdp, WRITE); 339 bio = gfs2_log_alloc_bio(sdp, blkno); 340 ret = bio_add_page(bio, page, size, offset); 341 WARN_ON(ret == 0); 342 } 343 } 344 345 /** 346 * gfs2_log_write_bh - write a buffer's content to the log 347 * @sdp: The super block 348 * @bh: The buffer pointing to the in-place location 349 * 350 * This writes the content of the buffer to the next available location 351 * in the log. The buffer will be unlocked once the i/o to the log has 352 * completed. 353 */ 354 355 static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) 356 { 357 gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh)); 358 } 359 360 /** 361 * gfs2_log_write_page - write one block stored in a page, into the log 362 * @sdp: The superblock 363 * @page: The struct page 364 * 365 * This writes the first block-sized part of the page into the log. Note 366 * that the page must have been allocated from the gfs2_page_pool mempool 367 * and that after this has been called, ownership has been transferred and 368 * the page may be freed at any time. 369 */ 370 371 void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) 372 { 373 struct super_block *sb = sdp->sd_vfs; 374 gfs2_log_write(sdp, page, sb->s_blocksize, 0); 375 } 376 377 static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, 378 u32 ld_length, u32 ld_data1) 379 { 380 struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 381 struct gfs2_log_descriptor *ld = page_address(page); 382 clear_page(ld); 383 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 384 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 385 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 386 ld->ld_type = cpu_to_be32(ld_type); 387 ld->ld_length = cpu_to_be32(ld_length); 388 ld->ld_data1 = cpu_to_be32(ld_data1); 389 ld->ld_data2 = 0; 390 return page; 391 } 392 393 static void gfs2_check_magic(struct buffer_head *bh) 394 { 395 void *kaddr; 396 __be32 *ptr; 397 398 clear_buffer_escaped(bh); 399 kaddr = kmap_atomic(bh->b_page); 400 ptr = kaddr + bh_offset(bh); 401 if (*ptr == cpu_to_be32(GFS2_MAGIC)) 402 set_buffer_escaped(bh); 403 kunmap_atomic(kaddr); 404 } 405 406 static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) 407 { 408 struct gfs2_bufdata *bda, *bdb; 409 410 bda = list_entry(a, struct gfs2_bufdata, bd_list); 411 bdb = list_entry(b, struct gfs2_bufdata, bd_list); 412 413 if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr) 414 return -1; 415 if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr) 416 return 1; 417 return 0; 418 } 419 420 static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, 421 unsigned int total, struct list_head *blist, 422 bool is_databuf) 423 { 424 struct gfs2_log_descriptor *ld; 425 struct gfs2_bufdata *bd1 = NULL, *bd2; 426 struct page *page; 427 unsigned int num; 428 unsigned n; 429 __be64 *ptr; 430 431 gfs2_log_lock(sdp); 432 list_sort(NULL, blist, blocknr_cmp); 433 bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list); 434 while(total) { 435 num = total; 436 if (total > limit) 437 num = limit; 438 gfs2_log_unlock(sdp); 439 page = gfs2_get_log_desc(sdp, 440 is_databuf ? GFS2_LOG_DESC_JDATA : 441 GFS2_LOG_DESC_METADATA, num + 1, num); 442 ld = page_address(page); 443 gfs2_log_lock(sdp); 444 ptr = (__be64 *)(ld + 1); 445 446 n = 0; 447 list_for_each_entry_continue(bd1, blist, bd_list) { 448 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 449 if (is_databuf) { 450 gfs2_check_magic(bd1->bd_bh); 451 *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); 452 } 453 if (++n >= num) 454 break; 455 } 456 457 gfs2_log_unlock(sdp); 458 gfs2_log_write_page(sdp, page); 459 gfs2_log_lock(sdp); 460 461 n = 0; 462 list_for_each_entry_continue(bd2, blist, bd_list) { 463 get_bh(bd2->bd_bh); 464 gfs2_log_unlock(sdp); 465 lock_buffer(bd2->bd_bh); 466 467 if (buffer_escaped(bd2->bd_bh)) { 468 void *kaddr; 469 page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 470 ptr = page_address(page); 471 kaddr = kmap_atomic(bd2->bd_bh->b_page); 472 memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), 473 bd2->bd_bh->b_size); 474 kunmap_atomic(kaddr); 475 *(__be32 *)ptr = 0; 476 clear_buffer_escaped(bd2->bd_bh); 477 unlock_buffer(bd2->bd_bh); 478 brelse(bd2->bd_bh); 479 gfs2_log_write_page(sdp, page); 480 } else { 481 gfs2_log_write_bh(sdp, bd2->bd_bh); 482 } 483 gfs2_log_lock(sdp); 484 if (++n >= num) 485 break; 486 } 487 488 BUG_ON(total < num); 489 total -= num; 490 } 491 gfs2_log_unlock(sdp); 492 } 493 494 static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 495 { 496 unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ 497 if (tr == NULL) 498 return; 499 gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, &tr->tr_buf, 0); 500 } 501 502 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 503 { 504 struct list_head *head; 505 struct gfs2_bufdata *bd; 506 507 if (tr == NULL) 508 return; 509 510 head = &tr->tr_buf; 511 while (!list_empty(head)) { 512 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 513 list_del_init(&bd->bd_list); 514 sdp->sd_log_num_buf--; 515 516 gfs2_unpin(sdp, bd->bd_bh, tr); 517 } 518 gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 519 } 520 521 static void buf_lo_before_scan(struct gfs2_jdesc *jd, 522 struct gfs2_log_header_host *head, int pass) 523 { 524 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 525 526 if (pass != 0) 527 return; 528 529 sdp->sd_found_blocks = 0; 530 sdp->sd_replayed_blocks = 0; 531 } 532 533 static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 534 struct gfs2_log_descriptor *ld, __be64 *ptr, 535 int pass) 536 { 537 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 538 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 539 struct gfs2_glock *gl = ip->i_gl; 540 unsigned int blks = be32_to_cpu(ld->ld_data1); 541 struct buffer_head *bh_log, *bh_ip; 542 u64 blkno; 543 int error = 0; 544 545 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 546 return 0; 547 548 gfs2_replay_incr_blk(sdp, &start); 549 550 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 551 blkno = be64_to_cpu(*ptr++); 552 553 sdp->sd_found_blocks++; 554 555 if (gfs2_revoke_check(sdp, blkno, start)) 556 continue; 557 558 error = gfs2_replay_read_block(jd, start, &bh_log); 559 if (error) 560 return error; 561 562 bh_ip = gfs2_meta_new(gl, blkno); 563 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 564 565 if (gfs2_meta_check(sdp, bh_ip)) 566 error = -EIO; 567 else 568 mark_buffer_dirty(bh_ip); 569 570 brelse(bh_log); 571 brelse(bh_ip); 572 573 if (error) 574 break; 575 576 sdp->sd_replayed_blocks++; 577 } 578 579 return error; 580 } 581 582 /** 583 * gfs2_meta_sync - Sync all buffers associated with a glock 584 * @gl: The glock 585 * 586 */ 587 588 static void gfs2_meta_sync(struct gfs2_glock *gl) 589 { 590 struct address_space *mapping = gfs2_glock2aspace(gl); 591 struct gfs2_sbd *sdp = gl->gl_sbd; 592 int error; 593 594 if (mapping == NULL) 595 mapping = &sdp->sd_aspace; 596 597 filemap_fdatawrite(mapping); 598 error = filemap_fdatawait(mapping); 599 600 if (error) 601 gfs2_io_error(gl->gl_sbd); 602 } 603 604 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 605 { 606 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 607 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 608 609 if (error) { 610 gfs2_meta_sync(ip->i_gl); 611 return; 612 } 613 if (pass != 1) 614 return; 615 616 gfs2_meta_sync(ip->i_gl); 617 618 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 619 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 620 } 621 622 static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 623 { 624 struct gfs2_meta_header *mh; 625 unsigned int offset; 626 struct list_head *head = &sdp->sd_log_le_revoke; 627 struct gfs2_bufdata *bd; 628 struct page *page; 629 unsigned int length; 630 631 gfs2_write_revokes(sdp); 632 if (!sdp->sd_log_num_revoke) 633 return; 634 635 length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 636 page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 637 offset = sizeof(struct gfs2_log_descriptor); 638 639 list_for_each_entry(bd, head, bd_list) { 640 sdp->sd_log_num_revoke--; 641 642 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 643 644 gfs2_log_write_page(sdp, page); 645 page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 646 mh = page_address(page); 647 clear_page(mh); 648 mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 649 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 650 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 651 offset = sizeof(struct gfs2_meta_header); 652 } 653 654 *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 655 offset += sizeof(u64); 656 } 657 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 658 659 gfs2_log_write_page(sdp, page); 660 } 661 662 static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 663 { 664 struct list_head *head = &sdp->sd_log_le_revoke; 665 struct gfs2_bufdata *bd; 666 struct gfs2_glock *gl; 667 668 while (!list_empty(head)) { 669 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 670 list_del_init(&bd->bd_list); 671 gl = bd->bd_gl; 672 atomic_dec(&gl->gl_revokes); 673 clear_bit(GLF_LFLUSH, &gl->gl_flags); 674 kmem_cache_free(gfs2_bufdata_cachep, bd); 675 } 676 } 677 678 static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 679 struct gfs2_log_header_host *head, int pass) 680 { 681 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 682 683 if (pass != 0) 684 return; 685 686 sdp->sd_found_revokes = 0; 687 sdp->sd_replay_tail = head->lh_tail; 688 } 689 690 static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 691 struct gfs2_log_descriptor *ld, __be64 *ptr, 692 int pass) 693 { 694 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 695 unsigned int blks = be32_to_cpu(ld->ld_length); 696 unsigned int revokes = be32_to_cpu(ld->ld_data1); 697 struct buffer_head *bh; 698 unsigned int offset; 699 u64 blkno; 700 int first = 1; 701 int error; 702 703 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 704 return 0; 705 706 offset = sizeof(struct gfs2_log_descriptor); 707 708 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 709 error = gfs2_replay_read_block(jd, start, &bh); 710 if (error) 711 return error; 712 713 if (!first) 714 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 715 716 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 717 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 718 719 error = gfs2_revoke_add(sdp, blkno, start); 720 if (error < 0) { 721 brelse(bh); 722 return error; 723 } 724 else if (error) 725 sdp->sd_found_revokes++; 726 727 if (!--revokes) 728 break; 729 offset += sizeof(u64); 730 } 731 732 brelse(bh); 733 offset = sizeof(struct gfs2_meta_header); 734 first = 0; 735 } 736 737 return 0; 738 } 739 740 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 741 { 742 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 743 744 if (error) { 745 gfs2_revoke_clean(sdp); 746 return; 747 } 748 if (pass != 1) 749 return; 750 751 fs_info(sdp, "jid=%u: Found %u revoke tags\n", 752 jd->jd_jid, sdp->sd_found_revokes); 753 754 gfs2_revoke_clean(sdp); 755 } 756 757 /** 758 * databuf_lo_before_commit - Scan the data buffers, writing as we go 759 * 760 */ 761 762 static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 763 { 764 unsigned int limit = buf_limit(sdp) / 2; 765 if (tr == NULL) 766 return; 767 gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, &tr->tr_databuf, 1); 768 } 769 770 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 771 struct gfs2_log_descriptor *ld, 772 __be64 *ptr, int pass) 773 { 774 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 775 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 776 struct gfs2_glock *gl = ip->i_gl; 777 unsigned int blks = be32_to_cpu(ld->ld_data1); 778 struct buffer_head *bh_log, *bh_ip; 779 u64 blkno; 780 u64 esc; 781 int error = 0; 782 783 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 784 return 0; 785 786 gfs2_replay_incr_blk(sdp, &start); 787 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 788 blkno = be64_to_cpu(*ptr++); 789 esc = be64_to_cpu(*ptr++); 790 791 sdp->sd_found_blocks++; 792 793 if (gfs2_revoke_check(sdp, blkno, start)) 794 continue; 795 796 error = gfs2_replay_read_block(jd, start, &bh_log); 797 if (error) 798 return error; 799 800 bh_ip = gfs2_meta_new(gl, blkno); 801 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 802 803 /* Unescape */ 804 if (esc) { 805 __be32 *eptr = (__be32 *)bh_ip->b_data; 806 *eptr = cpu_to_be32(GFS2_MAGIC); 807 } 808 mark_buffer_dirty(bh_ip); 809 810 brelse(bh_log); 811 brelse(bh_ip); 812 813 sdp->sd_replayed_blocks++; 814 } 815 816 return error; 817 } 818 819 /* FIXME: sort out accounting for log blocks etc. */ 820 821 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 822 { 823 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 824 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 825 826 if (error) { 827 gfs2_meta_sync(ip->i_gl); 828 return; 829 } 830 if (pass != 1) 831 return; 832 833 /* data sync? */ 834 gfs2_meta_sync(ip->i_gl); 835 836 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 837 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 838 } 839 840 static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 841 { 842 struct list_head *head; 843 struct gfs2_bufdata *bd; 844 845 if (tr == NULL) 846 return; 847 848 head = &tr->tr_databuf; 849 while (!list_empty(head)) { 850 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 851 list_del_init(&bd->bd_list); 852 sdp->sd_log_num_databuf--; 853 gfs2_unpin(sdp, bd->bd_bh, tr); 854 } 855 gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 856 } 857 858 859 const struct gfs2_log_operations gfs2_buf_lops = { 860 .lo_before_commit = buf_lo_before_commit, 861 .lo_after_commit = buf_lo_after_commit, 862 .lo_before_scan = buf_lo_before_scan, 863 .lo_scan_elements = buf_lo_scan_elements, 864 .lo_after_scan = buf_lo_after_scan, 865 .lo_name = "buf", 866 }; 867 868 const struct gfs2_log_operations gfs2_revoke_lops = { 869 .lo_before_commit = revoke_lo_before_commit, 870 .lo_after_commit = revoke_lo_after_commit, 871 .lo_before_scan = revoke_lo_before_scan, 872 .lo_scan_elements = revoke_lo_scan_elements, 873 .lo_after_scan = revoke_lo_after_scan, 874 .lo_name = "revoke", 875 }; 876 877 const struct gfs2_log_operations gfs2_databuf_lops = { 878 .lo_before_commit = databuf_lo_before_commit, 879 .lo_after_commit = databuf_lo_after_commit, 880 .lo_scan_elements = databuf_lo_scan_elements, 881 .lo_after_scan = databuf_lo_after_scan, 882 .lo_name = "databuf", 883 }; 884 885 const struct gfs2_log_operations *gfs2_log_ops[] = { 886 &gfs2_databuf_lops, 887 &gfs2_buf_lops, 888 &gfs2_revoke_lops, 889 NULL, 890 }; 891 892