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, 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 unsigned int nbuf; 498 if (tr == NULL) 499 return; 500 nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm; 501 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0); 502 } 503 504 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 505 { 506 struct list_head *head; 507 struct gfs2_bufdata *bd; 508 509 if (tr == NULL) 510 return; 511 512 head = &tr->tr_buf; 513 while (!list_empty(head)) { 514 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 515 list_del_init(&bd->bd_list); 516 gfs2_unpin(sdp, bd->bd_bh, tr); 517 } 518 } 519 520 static void buf_lo_before_scan(struct gfs2_jdesc *jd, 521 struct gfs2_log_header_host *head, int pass) 522 { 523 if (pass != 0) 524 return; 525 526 jd->jd_found_blocks = 0; 527 jd->jd_replayed_blocks = 0; 528 } 529 530 static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 531 struct gfs2_log_descriptor *ld, __be64 *ptr, 532 int pass) 533 { 534 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 535 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 536 struct gfs2_glock *gl = ip->i_gl; 537 unsigned int blks = be32_to_cpu(ld->ld_data1); 538 struct buffer_head *bh_log, *bh_ip; 539 u64 blkno; 540 int error = 0; 541 542 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 543 return 0; 544 545 gfs2_replay_incr_blk(sdp, &start); 546 547 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 548 blkno = be64_to_cpu(*ptr++); 549 550 jd->jd_found_blocks++; 551 552 if (gfs2_revoke_check(jd, blkno, start)) 553 continue; 554 555 error = gfs2_replay_read_block(jd, start, &bh_log); 556 if (error) 557 return error; 558 559 bh_ip = gfs2_meta_new(gl, blkno); 560 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 561 562 if (gfs2_meta_check(sdp, bh_ip)) 563 error = -EIO; 564 else 565 mark_buffer_dirty(bh_ip); 566 567 brelse(bh_log); 568 brelse(bh_ip); 569 570 if (error) 571 break; 572 573 jd->jd_replayed_blocks++; 574 } 575 576 return error; 577 } 578 579 /** 580 * gfs2_meta_sync - Sync all buffers associated with a glock 581 * @gl: The glock 582 * 583 */ 584 585 static void gfs2_meta_sync(struct gfs2_glock *gl) 586 { 587 struct address_space *mapping = gfs2_glock2aspace(gl); 588 struct gfs2_sbd *sdp = gl->gl_sbd; 589 int error; 590 591 if (mapping == NULL) 592 mapping = &sdp->sd_aspace; 593 594 filemap_fdatawrite(mapping); 595 error = filemap_fdatawait(mapping); 596 597 if (error) 598 gfs2_io_error(gl->gl_sbd); 599 } 600 601 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 602 { 603 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 604 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 605 606 if (error) { 607 gfs2_meta_sync(ip->i_gl); 608 return; 609 } 610 if (pass != 1) 611 return; 612 613 gfs2_meta_sync(ip->i_gl); 614 615 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 616 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 617 } 618 619 static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 620 { 621 struct gfs2_meta_header *mh; 622 unsigned int offset; 623 struct list_head *head = &sdp->sd_log_le_revoke; 624 struct gfs2_bufdata *bd; 625 struct page *page; 626 unsigned int length; 627 628 gfs2_write_revokes(sdp); 629 if (!sdp->sd_log_num_revoke) 630 return; 631 632 length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 633 page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 634 offset = sizeof(struct gfs2_log_descriptor); 635 636 list_for_each_entry(bd, head, bd_list) { 637 sdp->sd_log_num_revoke--; 638 639 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 640 641 gfs2_log_write_page(sdp, page); 642 page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 643 mh = page_address(page); 644 clear_page(mh); 645 mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 646 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 647 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 648 offset = sizeof(struct gfs2_meta_header); 649 } 650 651 *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 652 offset += sizeof(u64); 653 } 654 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 655 656 gfs2_log_write_page(sdp, page); 657 } 658 659 static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 660 { 661 struct list_head *head = &sdp->sd_log_le_revoke; 662 struct gfs2_bufdata *bd; 663 struct gfs2_glock *gl; 664 665 while (!list_empty(head)) { 666 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 667 list_del_init(&bd->bd_list); 668 gl = bd->bd_gl; 669 atomic_dec(&gl->gl_revokes); 670 clear_bit(GLF_LFLUSH, &gl->gl_flags); 671 kmem_cache_free(gfs2_bufdata_cachep, bd); 672 } 673 } 674 675 static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 676 struct gfs2_log_header_host *head, int pass) 677 { 678 if (pass != 0) 679 return; 680 681 jd->jd_found_revokes = 0; 682 jd->jd_replay_tail = head->lh_tail; 683 } 684 685 static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 686 struct gfs2_log_descriptor *ld, __be64 *ptr, 687 int pass) 688 { 689 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 690 unsigned int blks = be32_to_cpu(ld->ld_length); 691 unsigned int revokes = be32_to_cpu(ld->ld_data1); 692 struct buffer_head *bh; 693 unsigned int offset; 694 u64 blkno; 695 int first = 1; 696 int error; 697 698 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 699 return 0; 700 701 offset = sizeof(struct gfs2_log_descriptor); 702 703 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 704 error = gfs2_replay_read_block(jd, start, &bh); 705 if (error) 706 return error; 707 708 if (!first) 709 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 710 711 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 712 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 713 714 error = gfs2_revoke_add(jd, blkno, start); 715 if (error < 0) { 716 brelse(bh); 717 return error; 718 } 719 else if (error) 720 jd->jd_found_revokes++; 721 722 if (!--revokes) 723 break; 724 offset += sizeof(u64); 725 } 726 727 brelse(bh); 728 offset = sizeof(struct gfs2_meta_header); 729 first = 0; 730 } 731 732 return 0; 733 } 734 735 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 736 { 737 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 738 739 if (error) { 740 gfs2_revoke_clean(jd); 741 return; 742 } 743 if (pass != 1) 744 return; 745 746 fs_info(sdp, "jid=%u: Found %u revoke tags\n", 747 jd->jd_jid, jd->jd_found_revokes); 748 749 gfs2_revoke_clean(jd); 750 } 751 752 /** 753 * databuf_lo_before_commit - Scan the data buffers, writing as we go 754 * 755 */ 756 757 static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 758 { 759 unsigned int limit = databuf_limit(sdp); 760 unsigned int nbuf; 761 if (tr == NULL) 762 return; 763 nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm; 764 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1); 765 } 766 767 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 768 struct gfs2_log_descriptor *ld, 769 __be64 *ptr, int pass) 770 { 771 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 772 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 773 struct gfs2_glock *gl = ip->i_gl; 774 unsigned int blks = be32_to_cpu(ld->ld_data1); 775 struct buffer_head *bh_log, *bh_ip; 776 u64 blkno; 777 u64 esc; 778 int error = 0; 779 780 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 781 return 0; 782 783 gfs2_replay_incr_blk(sdp, &start); 784 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 785 blkno = be64_to_cpu(*ptr++); 786 esc = be64_to_cpu(*ptr++); 787 788 jd->jd_found_blocks++; 789 790 if (gfs2_revoke_check(jd, blkno, start)) 791 continue; 792 793 error = gfs2_replay_read_block(jd, start, &bh_log); 794 if (error) 795 return error; 796 797 bh_ip = gfs2_meta_new(gl, blkno); 798 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 799 800 /* Unescape */ 801 if (esc) { 802 __be32 *eptr = (__be32 *)bh_ip->b_data; 803 *eptr = cpu_to_be32(GFS2_MAGIC); 804 } 805 mark_buffer_dirty(bh_ip); 806 807 brelse(bh_log); 808 brelse(bh_ip); 809 810 jd->jd_replayed_blocks++; 811 } 812 813 return error; 814 } 815 816 /* FIXME: sort out accounting for log blocks etc. */ 817 818 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 819 { 820 struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 821 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 822 823 if (error) { 824 gfs2_meta_sync(ip->i_gl); 825 return; 826 } 827 if (pass != 1) 828 return; 829 830 /* data sync? */ 831 gfs2_meta_sync(ip->i_gl); 832 833 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 834 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 835 } 836 837 static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 838 { 839 struct list_head *head; 840 struct gfs2_bufdata *bd; 841 842 if (tr == NULL) 843 return; 844 845 head = &tr->tr_databuf; 846 while (!list_empty(head)) { 847 bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 848 list_del_init(&bd->bd_list); 849 gfs2_unpin(sdp, bd->bd_bh, tr); 850 } 851 } 852 853 854 const struct gfs2_log_operations gfs2_buf_lops = { 855 .lo_before_commit = buf_lo_before_commit, 856 .lo_after_commit = buf_lo_after_commit, 857 .lo_before_scan = buf_lo_before_scan, 858 .lo_scan_elements = buf_lo_scan_elements, 859 .lo_after_scan = buf_lo_after_scan, 860 .lo_name = "buf", 861 }; 862 863 const struct gfs2_log_operations gfs2_revoke_lops = { 864 .lo_before_commit = revoke_lo_before_commit, 865 .lo_after_commit = revoke_lo_after_commit, 866 .lo_before_scan = revoke_lo_before_scan, 867 .lo_scan_elements = revoke_lo_scan_elements, 868 .lo_after_scan = revoke_lo_after_scan, 869 .lo_name = "revoke", 870 }; 871 872 const struct gfs2_log_operations gfs2_databuf_lops = { 873 .lo_before_commit = databuf_lo_before_commit, 874 .lo_after_commit = databuf_lo_after_commit, 875 .lo_scan_elements = databuf_lo_scan_elements, 876 .lo_after_scan = databuf_lo_after_scan, 877 .lo_name = "databuf", 878 }; 879 880 const struct gfs2_log_operations *gfs2_log_ops[] = { 881 &gfs2_databuf_lops, 882 &gfs2_buf_lops, 883 &gfs2_revoke_lops, 884 NULL, 885 }; 886 887