1b3b94faaSDavid Teigland /* 2b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 33a8a9a10SSteven Whitehouse * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4b3b94faaSDavid Teigland * 5b3b94faaSDavid Teigland * This copyrighted material is made available to anyone wishing to use, 6b3b94faaSDavid Teigland * modify, copy, or redistribute it subject to the terms and conditions 7e9fc2aa0SSteven Whitehouse * of the GNU General Public License version 2. 8b3b94faaSDavid Teigland */ 9b3b94faaSDavid Teigland 10b3b94faaSDavid Teigland #include <linux/sched.h> 11b3b94faaSDavid Teigland #include <linux/slab.h> 12b3b94faaSDavid Teigland #include <linux/spinlock.h> 13b3b94faaSDavid Teigland #include <linux/completion.h> 14b3b94faaSDavid Teigland #include <linux/buffer_head.h> 155c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 16c969f58cSSteven Whitehouse #include <linux/bio.h> 17c969f58cSSteven Whitehouse #include <linux/fs.h> 18b3b94faaSDavid Teigland 19b3b94faaSDavid Teigland #include "gfs2.h" 205c676f6dSSteven Whitehouse #include "incore.h" 212332c443SRobert Peterson #include "inode.h" 22b3b94faaSDavid Teigland #include "glock.h" 23b3b94faaSDavid Teigland #include "log.h" 24b3b94faaSDavid Teigland #include "lops.h" 25b3b94faaSDavid Teigland #include "meta_io.h" 26b3b94faaSDavid Teigland #include "recovery.h" 27b3b94faaSDavid Teigland #include "rgrp.h" 28b3b94faaSDavid Teigland #include "trans.h" 295c676f6dSSteven Whitehouse #include "util.h" 3063997775SSteven Whitehouse #include "trace_gfs2.h" 31b3b94faaSDavid Teigland 329b9107a5SSteven Whitehouse /** 339b9107a5SSteven Whitehouse * gfs2_pin - Pin a buffer in memory 349b9107a5SSteven Whitehouse * @sdp: The superblock 359b9107a5SSteven Whitehouse * @bh: The buffer to be pinned 369b9107a5SSteven Whitehouse * 379b9107a5SSteven Whitehouse * The log lock must be held when calling this function 389b9107a5SSteven Whitehouse */ 399b9107a5SSteven Whitehouse static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 409b9107a5SSteven Whitehouse { 419b9107a5SSteven Whitehouse struct gfs2_bufdata *bd; 429b9107a5SSteven Whitehouse 4329687a2aSSteven Whitehouse BUG_ON(!current->journal_info); 449b9107a5SSteven Whitehouse 459b9107a5SSteven Whitehouse clear_buffer_dirty(bh); 469b9107a5SSteven Whitehouse if (test_set_buffer_pinned(bh)) 479b9107a5SSteven Whitehouse gfs2_assert_withdraw(sdp, 0); 489b9107a5SSteven Whitehouse if (!buffer_uptodate(bh)) 499b9107a5SSteven Whitehouse gfs2_io_error_bh(sdp, bh); 509b9107a5SSteven Whitehouse bd = bh->b_private; 519b9107a5SSteven Whitehouse /* If this buffer is in the AIL and it has already been written 529b9107a5SSteven Whitehouse * to in-place disk block, remove it from the AIL. 539b9107a5SSteven Whitehouse */ 54c618e87aSSteven Whitehouse spin_lock(&sdp->sd_ail_lock); 559b9107a5SSteven Whitehouse if (bd->bd_ail) 569b9107a5SSteven Whitehouse list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); 57c618e87aSSteven Whitehouse spin_unlock(&sdp->sd_ail_lock); 589b9107a5SSteven Whitehouse get_bh(bh); 595e687eacSBenjamin Marzinski atomic_inc(&sdp->sd_log_pinned); 6063997775SSteven Whitehouse trace_gfs2_pin(bd, 1); 619b9107a5SSteven Whitehouse } 629b9107a5SSteven Whitehouse 637c9ca621SBob Peterson static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) 647c9ca621SBob Peterson { 657c9ca621SBob Peterson return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; 667c9ca621SBob Peterson } 677c9ca621SBob Peterson 687c9ca621SBob Peterson static void maybe_release_space(struct gfs2_bufdata *bd) 697c9ca621SBob Peterson { 707c9ca621SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 717c9ca621SBob Peterson struct gfs2_sbd *sdp = gl->gl_sbd; 727c9ca621SBob Peterson struct gfs2_rgrpd *rgd = gl->gl_object; 737c9ca621SBob Peterson unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; 747c9ca621SBob Peterson struct gfs2_bitmap *bi = rgd->rd_bits + index; 757c9ca621SBob Peterson 767c9ca621SBob Peterson if (bi->bi_clone == 0) 777c9ca621SBob Peterson return; 787c9ca621SBob Peterson if (sdp->sd_args.ar_discard) 7966fc061bSSteven Whitehouse gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); 807c9ca621SBob Peterson memcpy(bi->bi_clone + bi->bi_offset, 817c9ca621SBob Peterson bd->bd_bh->b_data + bi->bi_offset, bi->bi_len); 827c9ca621SBob Peterson clear_bit(GBF_FULL, &bi->bi_flags); 837c9ca621SBob Peterson rgd->rd_free_clone = rgd->rd_free; 847c9ca621SBob Peterson } 857c9ca621SBob Peterson 869b9107a5SSteven Whitehouse /** 879b9107a5SSteven Whitehouse * gfs2_unpin - Unpin a buffer 889b9107a5SSteven Whitehouse * @sdp: the filesystem the buffer belongs to 899b9107a5SSteven Whitehouse * @bh: The buffer to unpin 909b9107a5SSteven Whitehouse * @ai: 9129687a2aSSteven Whitehouse * @flags: The inode dirty flags 929b9107a5SSteven Whitehouse * 939b9107a5SSteven Whitehouse */ 949b9107a5SSteven Whitehouse 959b9107a5SSteven Whitehouse static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 969b9107a5SSteven Whitehouse struct gfs2_ail *ai) 979b9107a5SSteven Whitehouse { 989b9107a5SSteven Whitehouse struct gfs2_bufdata *bd = bh->b_private; 999b9107a5SSteven Whitehouse 10029687a2aSSteven Whitehouse BUG_ON(!buffer_uptodate(bh)); 10129687a2aSSteven Whitehouse BUG_ON(!buffer_pinned(bh)); 1029b9107a5SSteven Whitehouse 1039b9107a5SSteven Whitehouse lock_buffer(bh); 1049b9107a5SSteven Whitehouse mark_buffer_dirty(bh); 1059b9107a5SSteven Whitehouse clear_buffer_pinned(bh); 1069b9107a5SSteven Whitehouse 1077c9ca621SBob Peterson if (buffer_is_rgrp(bd)) 1087c9ca621SBob Peterson maybe_release_space(bd); 1097c9ca621SBob Peterson 110d6a079e8SDave Chinner spin_lock(&sdp->sd_ail_lock); 1119b9107a5SSteven Whitehouse if (bd->bd_ail) { 1129b9107a5SSteven Whitehouse list_del(&bd->bd_ail_st_list); 1139b9107a5SSteven Whitehouse brelse(bh); 1149b9107a5SSteven Whitehouse } else { 1159b9107a5SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 1169b9107a5SSteven Whitehouse list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 1179b9107a5SSteven Whitehouse atomic_inc(&gl->gl_ail_count); 1189b9107a5SSteven Whitehouse } 1199b9107a5SSteven Whitehouse bd->bd_ail = ai; 1209b9107a5SSteven Whitehouse list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); 121d6a079e8SDave Chinner spin_unlock(&sdp->sd_ail_lock); 122d6a079e8SDave Chinner 12329687a2aSSteven Whitehouse clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 12463997775SSteven Whitehouse trace_gfs2_pin(bd, 0); 1259b9107a5SSteven Whitehouse unlock_buffer(bh); 1265e687eacSBenjamin Marzinski atomic_dec(&sdp->sd_log_pinned); 1279b9107a5SSteven Whitehouse } 1289b9107a5SSteven Whitehouse 12916615be1SSteven Whitehouse 13016615be1SSteven Whitehouse static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh) 13116615be1SSteven Whitehouse { 13216615be1SSteven Whitehouse return (struct gfs2_log_descriptor *)bh->b_data; 13316615be1SSteven Whitehouse } 13416615be1SSteven Whitehouse 13516615be1SSteven Whitehouse static inline __be64 *bh_log_ptr(struct buffer_head *bh) 13616615be1SSteven Whitehouse { 13716615be1SSteven Whitehouse struct gfs2_log_descriptor *ld = bh_log_desc(bh); 13816615be1SSteven Whitehouse return (__force __be64 *)(ld + 1); 13916615be1SSteven Whitehouse } 14016615be1SSteven Whitehouse 14116615be1SSteven Whitehouse static inline __be64 *bh_ptr_end(struct buffer_head *bh) 14216615be1SSteven Whitehouse { 14316615be1SSteven Whitehouse return (__force __be64 *)(bh->b_data + bh->b_size); 14416615be1SSteven Whitehouse } 14516615be1SSteven Whitehouse 14647ac5537SSteven Whitehouse /** 14747ac5537SSteven Whitehouse * gfs2_log_write_endio - End of I/O for a log buffer 14847ac5537SSteven Whitehouse * @bh: The buffer head 14947ac5537SSteven Whitehouse * @uptodate: I/O Status 15047ac5537SSteven Whitehouse * 15147ac5537SSteven Whitehouse */ 15247ac5537SSteven Whitehouse 15347ac5537SSteven Whitehouse static void gfs2_log_write_endio(struct buffer_head *bh, int uptodate) 15447ac5537SSteven Whitehouse { 15547ac5537SSteven Whitehouse struct gfs2_sbd *sdp = bh->b_private; 15647ac5537SSteven Whitehouse bh->b_private = NULL; 15747ac5537SSteven Whitehouse 15847ac5537SSteven Whitehouse end_buffer_write_sync(bh, uptodate); 15947ac5537SSteven Whitehouse if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 16047ac5537SSteven Whitehouse wake_up(&sdp->sd_log_flush_wait); 16147ac5537SSteven Whitehouse } 16247ac5537SSteven Whitehouse 16347ac5537SSteven Whitehouse /** 16447ac5537SSteven Whitehouse * gfs2_log_get_buf - Get and initialize a buffer to use for log control data 16547ac5537SSteven Whitehouse * @sdp: The GFS2 superblock 16647ac5537SSteven Whitehouse * 16747ac5537SSteven Whitehouse * tReturns: the buffer_head 16847ac5537SSteven Whitehouse */ 16947ac5537SSteven Whitehouse 17047ac5537SSteven Whitehouse static struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp) 17147ac5537SSteven Whitehouse { 17247ac5537SSteven Whitehouse u64 blkno = gfs2_log_bmap(sdp, sdp->sd_log_flush_head); 17347ac5537SSteven Whitehouse struct buffer_head *bh; 17447ac5537SSteven Whitehouse 17547ac5537SSteven Whitehouse bh = sb_getblk(sdp->sd_vfs, blkno); 17647ac5537SSteven Whitehouse lock_buffer(bh); 17747ac5537SSteven Whitehouse memset(bh->b_data, 0, bh->b_size); 17847ac5537SSteven Whitehouse set_buffer_uptodate(bh); 17947ac5537SSteven Whitehouse clear_buffer_dirty(bh); 18047ac5537SSteven Whitehouse gfs2_log_incr_head(sdp); 18147ac5537SSteven Whitehouse atomic_inc(&sdp->sd_log_in_flight); 18247ac5537SSteven Whitehouse bh->b_private = sdp; 18347ac5537SSteven Whitehouse bh->b_end_io = gfs2_log_write_endio; 18447ac5537SSteven Whitehouse 18547ac5537SSteven Whitehouse return bh; 18647ac5537SSteven Whitehouse } 18747ac5537SSteven Whitehouse 18847ac5537SSteven Whitehouse /** 18947ac5537SSteven Whitehouse * gfs2_fake_write_endio - 19047ac5537SSteven Whitehouse * @bh: The buffer head 19147ac5537SSteven Whitehouse * @uptodate: The I/O Status 19247ac5537SSteven Whitehouse * 19347ac5537SSteven Whitehouse */ 19447ac5537SSteven Whitehouse 19547ac5537SSteven Whitehouse static void gfs2_fake_write_endio(struct buffer_head *bh, int uptodate) 19647ac5537SSteven Whitehouse { 19747ac5537SSteven Whitehouse struct buffer_head *real_bh = bh->b_private; 19847ac5537SSteven Whitehouse struct gfs2_bufdata *bd = real_bh->b_private; 19947ac5537SSteven Whitehouse struct gfs2_sbd *sdp = bd->bd_gl->gl_sbd; 20047ac5537SSteven Whitehouse 20147ac5537SSteven Whitehouse end_buffer_write_sync(bh, uptodate); 20247ac5537SSteven Whitehouse free_buffer_head(bh); 20347ac5537SSteven Whitehouse unlock_buffer(real_bh); 20447ac5537SSteven Whitehouse brelse(real_bh); 20547ac5537SSteven Whitehouse if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 20647ac5537SSteven Whitehouse wake_up(&sdp->sd_log_flush_wait); 20747ac5537SSteven Whitehouse } 20847ac5537SSteven Whitehouse 20947ac5537SSteven Whitehouse /** 21047ac5537SSteven Whitehouse * gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log 21147ac5537SSteven Whitehouse * @sdp: the filesystem 21247ac5537SSteven Whitehouse * @data: the data the buffer_head should point to 21347ac5537SSteven Whitehouse * 21447ac5537SSteven Whitehouse * Returns: the log buffer descriptor 21547ac5537SSteven Whitehouse */ 21647ac5537SSteven Whitehouse 21747ac5537SSteven Whitehouse static struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, 21847ac5537SSteven Whitehouse struct buffer_head *real) 21947ac5537SSteven Whitehouse { 22047ac5537SSteven Whitehouse u64 blkno = gfs2_log_bmap(sdp, sdp->sd_log_flush_head); 22147ac5537SSteven Whitehouse struct buffer_head *bh; 22247ac5537SSteven Whitehouse 22347ac5537SSteven Whitehouse bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL); 22447ac5537SSteven Whitehouse atomic_set(&bh->b_count, 1); 22547ac5537SSteven Whitehouse bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate) | (1 << BH_Lock); 22647ac5537SSteven Whitehouse set_bh_page(bh, real->b_page, bh_offset(real)); 22747ac5537SSteven Whitehouse bh->b_blocknr = blkno; 22847ac5537SSteven Whitehouse bh->b_size = sdp->sd_sb.sb_bsize; 22947ac5537SSteven Whitehouse bh->b_bdev = sdp->sd_vfs->s_bdev; 23047ac5537SSteven Whitehouse bh->b_private = real; 23147ac5537SSteven Whitehouse bh->b_end_io = gfs2_fake_write_endio; 23247ac5537SSteven Whitehouse 23347ac5537SSteven Whitehouse gfs2_log_incr_head(sdp); 23447ac5537SSteven Whitehouse atomic_inc(&sdp->sd_log_in_flight); 23547ac5537SSteven Whitehouse 23647ac5537SSteven Whitehouse return bh; 23747ac5537SSteven Whitehouse } 23816615be1SSteven Whitehouse 23916615be1SSteven Whitehouse static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type) 24016615be1SSteven Whitehouse { 24116615be1SSteven Whitehouse struct buffer_head *bh = gfs2_log_get_buf(sdp); 24216615be1SSteven Whitehouse struct gfs2_log_descriptor *ld = bh_log_desc(bh); 24316615be1SSteven Whitehouse ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 24416615be1SSteven Whitehouse ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 24516615be1SSteven Whitehouse ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 24616615be1SSteven Whitehouse ld->ld_type = cpu_to_be32(ld_type); 24716615be1SSteven Whitehouse ld->ld_length = 0; 24816615be1SSteven Whitehouse ld->ld_data1 = 0; 24916615be1SSteven Whitehouse ld->ld_data2 = 0; 25016615be1SSteven Whitehouse memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); 25116615be1SSteven Whitehouse return bh; 25216615be1SSteven Whitehouse } 25316615be1SSteven Whitehouse 254b3b94faaSDavid Teigland static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 255b3b94faaSDavid Teigland { 256b3b94faaSDavid Teigland struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 2570ab7d13fSSteven Whitehouse struct gfs2_meta_header *mh; 258b3b94faaSDavid Teigland struct gfs2_trans *tr; 259b3b94faaSDavid Teigland 2609b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 2618bd95727SSteven Whitehouse gfs2_log_lock(sdp); 2629b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 2639b9107a5SSteven Whitehouse goto out; 2645c676f6dSSteven Whitehouse tr = current->journal_info; 265b3b94faaSDavid Teigland tr->tr_touched = 1; 266b3b94faaSDavid Teigland tr->tr_num_buf++; 267b3b94faaSDavid Teigland list_add(&bd->bd_list_tr, &tr->tr_list_buf); 268b3b94faaSDavid Teigland if (!list_empty(&le->le_list)) 2699b9107a5SSteven Whitehouse goto out; 2702bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 2712bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 272b3b94faaSDavid Teigland gfs2_meta_check(sdp, bd->bd_bh); 273a98ab220SSteven Whitehouse gfs2_pin(sdp, bd->bd_bh); 2740ab7d13fSSteven Whitehouse mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; 2750ab7d13fSSteven Whitehouse mh->__pad0 = cpu_to_be64(0); 2760ab7d13fSSteven Whitehouse mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); 277b3b94faaSDavid Teigland sdp->sd_log_num_buf++; 278b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_buf); 279b3b94faaSDavid Teigland tr->tr_num_buf_new++; 2809b9107a5SSteven Whitehouse out: 2819b9107a5SSteven Whitehouse gfs2_log_unlock(sdp); 2829b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 283b3b94faaSDavid Teigland } 284b3b94faaSDavid Teigland 285b3b94faaSDavid Teigland static void buf_lo_before_commit(struct gfs2_sbd *sdp) 286b3b94faaSDavid Teigland { 287b3b94faaSDavid Teigland struct buffer_head *bh; 288b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 289b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 290905d2aefSBob Peterson unsigned int total; 291b3b94faaSDavid Teigland unsigned int limit; 292b3b94faaSDavid Teigland unsigned int num; 293b3b94faaSDavid Teigland unsigned n; 294b3b94faaSDavid Teigland __be64 *ptr; 295b3b94faaSDavid Teigland 2962332c443SRobert Peterson limit = buf_limit(sdp); 297b3b94faaSDavid Teigland /* for 4k blocks, limit = 503 */ 298b3b94faaSDavid Teigland 299905d2aefSBob Peterson gfs2_log_lock(sdp); 300905d2aefSBob Peterson total = sdp->sd_log_num_buf; 301b3b94faaSDavid Teigland bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); 302b3b94faaSDavid Teigland while(total) { 303b3b94faaSDavid Teigland num = total; 304b3b94faaSDavid Teigland if (total > limit) 305b3b94faaSDavid Teigland num = limit; 306905d2aefSBob Peterson gfs2_log_unlock(sdp); 30716615be1SSteven Whitehouse bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA); 308905d2aefSBob Peterson gfs2_log_lock(sdp); 30916615be1SSteven Whitehouse ld = bh_log_desc(bh); 31016615be1SSteven Whitehouse ptr = bh_log_ptr(bh); 311b3b94faaSDavid Teigland ld->ld_length = cpu_to_be32(num + 1); 312b3b94faaSDavid Teigland ld->ld_data1 = cpu_to_be32(num); 313b3b94faaSDavid Teigland 314b3b94faaSDavid Teigland n = 0; 315568f4c96SSteven Whitehouse list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, 316568f4c96SSteven Whitehouse bd_le.le_list) { 317b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 318b3b94faaSDavid Teigland if (++n >= num) 319b3b94faaSDavid Teigland break; 320b3b94faaSDavid Teigland } 321b3b94faaSDavid Teigland 322905d2aefSBob Peterson gfs2_log_unlock(sdp); 323721a9602SJens Axboe submit_bh(WRITE_SYNC, bh); 324905d2aefSBob Peterson gfs2_log_lock(sdp); 325b3b94faaSDavid Teigland 326b3b94faaSDavid Teigland n = 0; 327568f4c96SSteven Whitehouse list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, 328568f4c96SSteven Whitehouse bd_le.le_list) { 32916615be1SSteven Whitehouse get_bh(bd2->bd_bh); 330905d2aefSBob Peterson gfs2_log_unlock(sdp); 33116615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 332b3b94faaSDavid Teigland bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); 333721a9602SJens Axboe submit_bh(WRITE_SYNC, bh); 334905d2aefSBob Peterson gfs2_log_lock(sdp); 335b3b94faaSDavid Teigland if (++n >= num) 336b3b94faaSDavid Teigland break; 337b3b94faaSDavid Teigland } 338b3b94faaSDavid Teigland 339905d2aefSBob Peterson BUG_ON(total < num); 340b3b94faaSDavid Teigland total -= num; 341b3b94faaSDavid Teigland } 342905d2aefSBob Peterson gfs2_log_unlock(sdp); 343b3b94faaSDavid Teigland } 344b3b94faaSDavid Teigland 345b3b94faaSDavid Teigland static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 346b3b94faaSDavid Teigland { 347b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_buf; 348b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 349b3b94faaSDavid Teigland 350b3b94faaSDavid Teigland while (!list_empty(head)) { 351b3b94faaSDavid Teigland bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 352b3b94faaSDavid Teigland list_del_init(&bd->bd_le.le_list); 353b3b94faaSDavid Teigland sdp->sd_log_num_buf--; 354b3b94faaSDavid Teigland 355a98ab220SSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 356b3b94faaSDavid Teigland } 357b3b94faaSDavid Teigland gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); 358b3b94faaSDavid Teigland } 359b3b94faaSDavid Teigland 360b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 36155167622SAl Viro struct gfs2_log_header_host *head, int pass) 362b3b94faaSDavid Teigland { 363feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 364b3b94faaSDavid Teigland 365b3b94faaSDavid Teigland if (pass != 0) 366b3b94faaSDavid Teigland return; 367b3b94faaSDavid Teigland 368b3b94faaSDavid Teigland sdp->sd_found_blocks = 0; 369b3b94faaSDavid Teigland sdp->sd_replayed_blocks = 0; 370b3b94faaSDavid Teigland } 371b3b94faaSDavid Teigland 372b3b94faaSDavid Teigland static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 373b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 374b3b94faaSDavid Teigland int pass) 375b3b94faaSDavid Teigland { 376feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 377feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 3785c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 379b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 380b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 381cd915493SSteven Whitehouse u64 blkno; 382b3b94faaSDavid Teigland int error = 0; 383b3b94faaSDavid Teigland 384b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 385b3b94faaSDavid Teigland return 0; 386b3b94faaSDavid Teigland 387b3b94faaSDavid Teigland gfs2_replay_incr_blk(sdp, &start); 388b3b94faaSDavid Teigland 389b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 390b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 391b3b94faaSDavid Teigland 392b3b94faaSDavid Teigland sdp->sd_found_blocks++; 393b3b94faaSDavid Teigland 394b3b94faaSDavid Teigland if (gfs2_revoke_check(sdp, blkno, start)) 395b3b94faaSDavid Teigland continue; 396b3b94faaSDavid Teigland 397b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 398b3b94faaSDavid Teigland if (error) 399b3b94faaSDavid Teigland return error; 400b3b94faaSDavid Teigland 401b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 402b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 403b3b94faaSDavid Teigland 404b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 405b3b94faaSDavid Teigland error = -EIO; 406b3b94faaSDavid Teigland else 407b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 408b3b94faaSDavid Teigland 409b3b94faaSDavid Teigland brelse(bh_log); 410b3b94faaSDavid Teigland brelse(bh_ip); 411b3b94faaSDavid Teigland 412b3b94faaSDavid Teigland if (error) 413b3b94faaSDavid Teigland break; 414b3b94faaSDavid Teigland 415b3b94faaSDavid Teigland sdp->sd_replayed_blocks++; 416b3b94faaSDavid Teigland } 417b3b94faaSDavid Teigland 418b3b94faaSDavid Teigland return error; 419b3b94faaSDavid Teigland } 420b3b94faaSDavid Teigland 421b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 422b3b94faaSDavid Teigland { 423feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 424feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 425b3b94faaSDavid Teigland 426b3b94faaSDavid Teigland if (error) { 4277276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 428b3b94faaSDavid Teigland return; 429b3b94faaSDavid Teigland } 430b3b94faaSDavid Teigland if (pass != 1) 431b3b94faaSDavid Teigland return; 432b3b94faaSDavid Teigland 4337276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 434b3b94faaSDavid Teigland 435b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 436b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 437b3b94faaSDavid Teigland } 438b3b94faaSDavid Teigland 439b3b94faaSDavid Teigland static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 440b3b94faaSDavid Teigland { 441f42ab085SSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 442f42ab085SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 443b3b94faaSDavid Teigland struct gfs2_trans *tr; 444b3b94faaSDavid Teigland 4455c676f6dSSteven Whitehouse tr = current->journal_info; 446b3b94faaSDavid Teigland tr->tr_touched = 1; 447b3b94faaSDavid Teigland tr->tr_num_revoke++; 448b3b94faaSDavid Teigland sdp->sd_log_num_revoke++; 449f42ab085SSteven Whitehouse atomic_inc(&gl->gl_revokes); 450f42ab085SSteven Whitehouse set_bit(GLF_LFLUSH, &gl->gl_flags); 451b3b94faaSDavid Teigland list_add(&le->le_list, &sdp->sd_log_le_revoke); 452b3b94faaSDavid Teigland } 453b3b94faaSDavid Teigland 454b3b94faaSDavid Teigland static void revoke_lo_before_commit(struct gfs2_sbd *sdp) 455b3b94faaSDavid Teigland { 456b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 457b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 458b3b94faaSDavid Teigland struct buffer_head *bh; 459b3b94faaSDavid Teigland unsigned int offset; 460b3b94faaSDavid Teigland struct list_head *head = &sdp->sd_log_le_revoke; 46182e86087SSteven Whitehouse struct gfs2_bufdata *bd; 462b3b94faaSDavid Teigland 463b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 464b3b94faaSDavid Teigland return; 465b3b94faaSDavid Teigland 46616615be1SSteven Whitehouse bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE); 46716615be1SSteven Whitehouse ld = bh_log_desc(bh); 468568f4c96SSteven Whitehouse ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, 469cd915493SSteven Whitehouse sizeof(u64))); 470b3b94faaSDavid Teigland ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); 471b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 472b3b94faaSDavid Teigland 473f42ab085SSteven Whitehouse list_for_each_entry(bd, head, bd_le.le_list) { 474b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 475b3b94faaSDavid Teigland 476cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 477721a9602SJens Axboe submit_bh(WRITE_SYNC, bh); 478b3b94faaSDavid Teigland 479b3b94faaSDavid Teigland bh = gfs2_log_get_buf(sdp); 480b3b94faaSDavid Teigland mh = (struct gfs2_meta_header *)bh->b_data; 481b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 482e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 483e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 484b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 485b3b94faaSDavid Teigland } 486b3b94faaSDavid Teigland 48782e86087SSteven Whitehouse *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno); 488cd915493SSteven Whitehouse offset += sizeof(u64); 489b3b94faaSDavid Teigland } 490b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 491b3b94faaSDavid Teigland 492721a9602SJens Axboe submit_bh(WRITE_SYNC, bh); 493b3b94faaSDavid Teigland } 494b3b94faaSDavid Teigland 495f42ab085SSteven Whitehouse static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 496f42ab085SSteven Whitehouse { 497f42ab085SSteven Whitehouse struct list_head *head = &sdp->sd_log_le_revoke; 498f42ab085SSteven Whitehouse struct gfs2_bufdata *bd; 499f42ab085SSteven Whitehouse struct gfs2_glock *gl; 500f42ab085SSteven Whitehouse 501f42ab085SSteven Whitehouse while (!list_empty(head)) { 502f42ab085SSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 503f42ab085SSteven Whitehouse list_del_init(&bd->bd_le.le_list); 504f42ab085SSteven Whitehouse gl = bd->bd_gl; 505f42ab085SSteven Whitehouse atomic_dec(&gl->gl_revokes); 506f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 507f42ab085SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 508f42ab085SSteven Whitehouse } 509f42ab085SSteven Whitehouse } 510f42ab085SSteven Whitehouse 511b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 51255167622SAl Viro struct gfs2_log_header_host *head, int pass) 513b3b94faaSDavid Teigland { 514feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 515b3b94faaSDavid Teigland 516b3b94faaSDavid Teigland if (pass != 0) 517b3b94faaSDavid Teigland return; 518b3b94faaSDavid Teigland 519b3b94faaSDavid Teigland sdp->sd_found_revokes = 0; 520b3b94faaSDavid Teigland sdp->sd_replay_tail = head->lh_tail; 521b3b94faaSDavid Teigland } 522b3b94faaSDavid Teigland 523b3b94faaSDavid Teigland static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 524b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 525b3b94faaSDavid Teigland int pass) 526b3b94faaSDavid Teigland { 527feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 528b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 529b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 530b3b94faaSDavid Teigland struct buffer_head *bh; 531b3b94faaSDavid Teigland unsigned int offset; 532cd915493SSteven Whitehouse u64 blkno; 533b3b94faaSDavid Teigland int first = 1; 534b3b94faaSDavid Teigland int error; 535b3b94faaSDavid Teigland 536b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 537b3b94faaSDavid Teigland return 0; 538b3b94faaSDavid Teigland 539b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 540b3b94faaSDavid Teigland 541b3b94faaSDavid Teigland for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 542b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 543b3b94faaSDavid Teigland if (error) 544b3b94faaSDavid Teigland return error; 545b3b94faaSDavid Teigland 546b3b94faaSDavid Teigland if (!first) 547b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 548b3b94faaSDavid Teigland 549cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 550b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 551b3b94faaSDavid Teigland 552b3b94faaSDavid Teigland error = gfs2_revoke_add(sdp, blkno, start); 5533ad62e87SBob Peterson if (error < 0) { 5543ad62e87SBob Peterson brelse(bh); 555b3b94faaSDavid Teigland return error; 5563ad62e87SBob Peterson } 557b3b94faaSDavid Teigland else if (error) 558b3b94faaSDavid Teigland sdp->sd_found_revokes++; 559b3b94faaSDavid Teigland 560b3b94faaSDavid Teigland if (!--revokes) 561b3b94faaSDavid Teigland break; 562cd915493SSteven Whitehouse offset += sizeof(u64); 563b3b94faaSDavid Teigland } 564b3b94faaSDavid Teigland 565b3b94faaSDavid Teigland brelse(bh); 566b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 567b3b94faaSDavid Teigland first = 0; 568b3b94faaSDavid Teigland } 569b3b94faaSDavid Teigland 570b3b94faaSDavid Teigland return 0; 571b3b94faaSDavid Teigland } 572b3b94faaSDavid Teigland 573b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 574b3b94faaSDavid Teigland { 575feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 576b3b94faaSDavid Teigland 577b3b94faaSDavid Teigland if (error) { 578b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 579b3b94faaSDavid Teigland return; 580b3b94faaSDavid Teigland } 581b3b94faaSDavid Teigland if (pass != 1) 582b3b94faaSDavid Teigland return; 583b3b94faaSDavid Teigland 584b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 585b3b94faaSDavid Teigland jd->jd_jid, sdp->sd_found_revokes); 586b3b94faaSDavid Teigland 587b3b94faaSDavid Teigland gfs2_revoke_clean(sdp); 588b3b94faaSDavid Teigland } 589b3b94faaSDavid Teigland 59018ec7d5cSSteven Whitehouse /** 59118ec7d5cSSteven Whitehouse * databuf_lo_add - Add a databuf to the transaction. 59218ec7d5cSSteven Whitehouse * 59318ec7d5cSSteven Whitehouse * This is used in two distinct cases: 59418ec7d5cSSteven Whitehouse * i) In ordered write mode 59518ec7d5cSSteven Whitehouse * We put the data buffer on a list so that we can ensure that its 59618ec7d5cSSteven Whitehouse * synced to disk at the right time 59718ec7d5cSSteven Whitehouse * ii) In journaled data mode 59818ec7d5cSSteven Whitehouse * We need to journal the data block in the same way as metadata in 59918ec7d5cSSteven Whitehouse * the functions above. The difference is that here we have a tag 60018ec7d5cSSteven Whitehouse * which is two __be64's being the block number (as per meta data) 60118ec7d5cSSteven Whitehouse * and a flag which says whether the data block needs escaping or 60218ec7d5cSSteven Whitehouse * not. This means we need a new log entry for each 251 or so data 60318ec7d5cSSteven Whitehouse * blocks, which isn't an enormous overhead but twice as much as 60418ec7d5cSSteven Whitehouse * for normal metadata blocks. 60518ec7d5cSSteven Whitehouse */ 606b3b94faaSDavid Teigland static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) 607b3b94faaSDavid Teigland { 60818ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); 6095c676f6dSSteven Whitehouse struct gfs2_trans *tr = current->journal_info; 61018ec7d5cSSteven Whitehouse struct address_space *mapping = bd->bd_bh->b_page->mapping; 611feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 612b3b94faaSDavid Teigland 6139b9107a5SSteven Whitehouse lock_buffer(bd->bd_bh); 6148bd95727SSteven Whitehouse gfs2_log_lock(sdp); 6159ff8ec32SSteven Whitehouse if (tr) { 6169b9107a5SSteven Whitehouse if (!list_empty(&bd->bd_list_tr)) 6179b9107a5SSteven Whitehouse goto out; 61818ec7d5cSSteven Whitehouse tr->tr_touched = 1; 619773ed1a0SRobert Peterson if (gfs2_is_jdata(ip)) { 62018ec7d5cSSteven Whitehouse tr->tr_num_buf++; 62118ec7d5cSSteven Whitehouse list_add(&bd->bd_list_tr, &tr->tr_list_buf); 622773ed1a0SRobert Peterson } 6239ff8ec32SSteven Whitehouse } 624ddf4b426SBenjamin Marzinski if (!list_empty(&le->le_list)) 6259b9107a5SSteven Whitehouse goto out; 6262332c443SRobert Peterson 6272bcd610dSSteven Whitehouse set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 6282bcd610dSSteven Whitehouse set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); 6292332c443SRobert Peterson if (gfs2_is_jdata(ip)) { 6302332c443SRobert Peterson gfs2_pin(sdp, bd->bd_bh); 6312332c443SRobert Peterson tr->tr_num_databuf_new++; 632bdcb8856SBob Peterson sdp->sd_log_num_databuf++; 633e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_databuf); 634d7b616e2SSteven Whitehouse } else { 635e5884636SDave Chinner list_add_tail(&le->le_list, &sdp->sd_log_le_ordered); 636d7b616e2SSteven Whitehouse } 6379b9107a5SSteven Whitehouse out: 638b3b94faaSDavid Teigland gfs2_log_unlock(sdp); 6399b9107a5SSteven Whitehouse unlock_buffer(bd->bd_bh); 640b3b94faaSDavid Teigland } 641b3b94faaSDavid Teigland 64216615be1SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 64318ec7d5cSSteven Whitehouse { 64418ec7d5cSSteven Whitehouse void *kaddr; 64518ec7d5cSSteven Whitehouse __be32 *ptr; 64618ec7d5cSSteven Whitehouse 64716615be1SSteven Whitehouse clear_buffer_escaped(bh); 64816615be1SSteven Whitehouse kaddr = kmap_atomic(bh->b_page, KM_USER0); 64918ec7d5cSSteven Whitehouse ptr = kaddr + bh_offset(bh); 65018ec7d5cSSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 65116615be1SSteven Whitehouse set_buffer_escaped(bh); 652c312c4fdSRussell Cattelan kunmap_atomic(kaddr, KM_USER0); 65316615be1SSteven Whitehouse } 65418ec7d5cSSteven Whitehouse 65516615be1SSteven Whitehouse static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh, 65616615be1SSteven Whitehouse struct list_head *list, struct list_head *done, 65716615be1SSteven Whitehouse unsigned int n) 65816615be1SSteven Whitehouse { 65916615be1SSteven Whitehouse struct buffer_head *bh1; 66016615be1SSteven Whitehouse struct gfs2_log_descriptor *ld; 66116615be1SSteven Whitehouse struct gfs2_bufdata *bd; 66216615be1SSteven Whitehouse __be64 *ptr; 66316615be1SSteven Whitehouse 66416615be1SSteven Whitehouse if (!bh) 66516615be1SSteven Whitehouse return; 66616615be1SSteven Whitehouse 66716615be1SSteven Whitehouse ld = bh_log_desc(bh); 66816615be1SSteven Whitehouse ld->ld_length = cpu_to_be32(n + 1); 66916615be1SSteven Whitehouse ld->ld_data1 = cpu_to_be32(n); 67016615be1SSteven Whitehouse 67116615be1SSteven Whitehouse ptr = bh_log_ptr(bh); 67216615be1SSteven Whitehouse 67316615be1SSteven Whitehouse get_bh(bh); 674721a9602SJens Axboe submit_bh(WRITE_SYNC, bh); 67516615be1SSteven Whitehouse gfs2_log_lock(sdp); 67616615be1SSteven Whitehouse while(!list_empty(list)) { 67716615be1SSteven Whitehouse bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list); 67816615be1SSteven Whitehouse list_move_tail(&bd->bd_le.le_list, done); 67916615be1SSteven Whitehouse get_bh(bd->bd_bh); 68016615be1SSteven Whitehouse while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) { 68116615be1SSteven Whitehouse gfs2_log_incr_head(sdp); 68216615be1SSteven Whitehouse ptr += 2; 68316615be1SSteven Whitehouse } 68416615be1SSteven Whitehouse gfs2_log_unlock(sdp); 68516615be1SSteven Whitehouse lock_buffer(bd->bd_bh); 68616615be1SSteven Whitehouse if (buffer_escaped(bd->bd_bh)) { 68716615be1SSteven Whitehouse void *kaddr; 68816615be1SSteven Whitehouse bh1 = gfs2_log_get_buf(sdp); 68916615be1SSteven Whitehouse kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0); 69016615be1SSteven Whitehouse memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh), 69116615be1SSteven Whitehouse bh1->b_size); 69216615be1SSteven Whitehouse kunmap_atomic(kaddr, KM_USER0); 69316615be1SSteven Whitehouse *(__be32 *)bh1->b_data = 0; 69416615be1SSteven Whitehouse clear_buffer_escaped(bd->bd_bh); 69516615be1SSteven Whitehouse unlock_buffer(bd->bd_bh); 69616615be1SSteven Whitehouse brelse(bd->bd_bh); 69716615be1SSteven Whitehouse } else { 69816615be1SSteven Whitehouse bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh); 69916615be1SSteven Whitehouse } 700721a9602SJens Axboe submit_bh(WRITE_SYNC, bh1); 70116615be1SSteven Whitehouse gfs2_log_lock(sdp); 70216615be1SSteven Whitehouse ptr += 2; 70316615be1SSteven Whitehouse } 70416615be1SSteven Whitehouse gfs2_log_unlock(sdp); 70516615be1SSteven Whitehouse brelse(bh); 70618ec7d5cSSteven Whitehouse } 70718ec7d5cSSteven Whitehouse 70818ec7d5cSSteven Whitehouse /** 70918ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 71018ec7d5cSSteven Whitehouse * 71118ec7d5cSSteven Whitehouse */ 712d7b616e2SSteven Whitehouse 713b3b94faaSDavid Teigland static void databuf_lo_before_commit(struct gfs2_sbd *sdp) 714b3b94faaSDavid Teigland { 71516615be1SSteven Whitehouse struct gfs2_bufdata *bd = NULL; 71616615be1SSteven Whitehouse struct buffer_head *bh = NULL; 71716615be1SSteven Whitehouse unsigned int n = 0; 71816615be1SSteven Whitehouse __be64 *ptr = NULL, *end = NULL; 71916615be1SSteven Whitehouse LIST_HEAD(processed); 72016615be1SSteven Whitehouse LIST_HEAD(in_progress); 721b3b94faaSDavid Teigland 722f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 72316615be1SSteven Whitehouse while (!list_empty(&sdp->sd_log_le_databuf)) { 72416615be1SSteven Whitehouse if (ptr == end) { 725f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 72616615be1SSteven Whitehouse gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); 727d7b616e2SSteven Whitehouse n = 0; 72816615be1SSteven Whitehouse bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA); 72916615be1SSteven Whitehouse ptr = bh_log_ptr(bh); 73016615be1SSteven Whitehouse end = bh_ptr_end(bh) - 1; 731f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 73218ec7d5cSSteven Whitehouse continue; 73316615be1SSteven Whitehouse } 73416615be1SSteven Whitehouse bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list); 73516615be1SSteven Whitehouse list_move_tail(&bd->bd_le.le_list, &in_progress); 73616615be1SSteven Whitehouse gfs2_check_magic(bd->bd_bh); 73716615be1SSteven Whitehouse *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr); 73816615be1SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0); 73916615be1SSteven Whitehouse n++; 74016615be1SSteven Whitehouse } 741f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 74216615be1SSteven Whitehouse gfs2_write_blocks(sdp, bh, &in_progress, &processed, n); 743f55ab26aSSteven Whitehouse gfs2_log_lock(sdp); 74416615be1SSteven Whitehouse list_splice(&processed, &sdp->sd_log_le_databuf); 745f55ab26aSSteven Whitehouse gfs2_log_unlock(sdp); 746b3b94faaSDavid Teigland } 747b3b94faaSDavid Teigland 74818ec7d5cSSteven Whitehouse static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 74918ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 75018ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 75118ec7d5cSSteven Whitehouse { 752feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 753feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 7545c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 75518ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 75618ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 757cd915493SSteven Whitehouse u64 blkno; 758cd915493SSteven Whitehouse u64 esc; 75918ec7d5cSSteven Whitehouse int error = 0; 76018ec7d5cSSteven Whitehouse 76118ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 76218ec7d5cSSteven Whitehouse return 0; 76318ec7d5cSSteven Whitehouse 76418ec7d5cSSteven Whitehouse gfs2_replay_incr_blk(sdp, &start); 76518ec7d5cSSteven Whitehouse for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { 76618ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 76718ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 76818ec7d5cSSteven Whitehouse 76918ec7d5cSSteven Whitehouse sdp->sd_found_blocks++; 77018ec7d5cSSteven Whitehouse 77118ec7d5cSSteven Whitehouse if (gfs2_revoke_check(sdp, blkno, start)) 77218ec7d5cSSteven Whitehouse continue; 77318ec7d5cSSteven Whitehouse 77418ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 77518ec7d5cSSteven Whitehouse if (error) 77618ec7d5cSSteven Whitehouse return error; 77718ec7d5cSSteven Whitehouse 77818ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 77918ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 78018ec7d5cSSteven Whitehouse 78118ec7d5cSSteven Whitehouse /* Unescape */ 78218ec7d5cSSteven Whitehouse if (esc) { 78318ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 78418ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 78518ec7d5cSSteven Whitehouse } 78618ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 78718ec7d5cSSteven Whitehouse 78818ec7d5cSSteven Whitehouse brelse(bh_log); 78918ec7d5cSSteven Whitehouse brelse(bh_ip); 79018ec7d5cSSteven Whitehouse 79118ec7d5cSSteven Whitehouse sdp->sd_replayed_blocks++; 79218ec7d5cSSteven Whitehouse } 79318ec7d5cSSteven Whitehouse 79418ec7d5cSSteven Whitehouse return error; 79518ec7d5cSSteven Whitehouse } 79618ec7d5cSSteven Whitehouse 79718ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 79818ec7d5cSSteven Whitehouse 79918ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 80018ec7d5cSSteven Whitehouse { 801feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 802feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 80318ec7d5cSSteven Whitehouse 80418ec7d5cSSteven Whitehouse if (error) { 8057276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 80618ec7d5cSSteven Whitehouse return; 80718ec7d5cSSteven Whitehouse } 80818ec7d5cSSteven Whitehouse if (pass != 1) 80918ec7d5cSSteven Whitehouse return; 81018ec7d5cSSteven Whitehouse 81118ec7d5cSSteven Whitehouse /* data sync? */ 8127276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 81318ec7d5cSSteven Whitehouse 81418ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 81518ec7d5cSSteven Whitehouse jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); 81618ec7d5cSSteven Whitehouse } 81718ec7d5cSSteven Whitehouse 81818ec7d5cSSteven Whitehouse static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 81918ec7d5cSSteven Whitehouse { 82018ec7d5cSSteven Whitehouse struct list_head *head = &sdp->sd_log_le_databuf; 82118ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 82218ec7d5cSSteven Whitehouse 82318ec7d5cSSteven Whitehouse while (!list_empty(head)) { 82418ec7d5cSSteven Whitehouse bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); 825b8e1aabfSSteven Whitehouse list_del_init(&bd->bd_le.le_list); 82618ec7d5cSSteven Whitehouse sdp->sd_log_num_databuf--; 82718ec7d5cSSteven Whitehouse gfs2_unpin(sdp, bd->bd_bh, ai); 82818ec7d5cSSteven Whitehouse } 82918ec7d5cSSteven Whitehouse gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); 83018ec7d5cSSteven Whitehouse } 83118ec7d5cSSteven Whitehouse 83218ec7d5cSSteven Whitehouse 833b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_buf_lops = { 834b3b94faaSDavid Teigland .lo_add = buf_lo_add, 835b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 836b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 837b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 838b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 839b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 840ea67eedbSSteven Whitehouse .lo_name = "buf", 841b3b94faaSDavid Teigland }; 842b3b94faaSDavid Teigland 843b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_revoke_lops = { 844b3b94faaSDavid Teigland .lo_add = revoke_lo_add, 845b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 846f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 847b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 848b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 849b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 850ea67eedbSSteven Whitehouse .lo_name = "revoke", 851b3b94faaSDavid Teigland }; 852b3b94faaSDavid Teigland 853b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_rg_lops = { 854ea67eedbSSteven Whitehouse .lo_name = "rg", 855b3b94faaSDavid Teigland }; 856b3b94faaSDavid Teigland 857b09e593dSSteven Whitehouse const struct gfs2_log_operations gfs2_databuf_lops = { 858b3b94faaSDavid Teigland .lo_add = databuf_lo_add, 859b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 86018ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 86118ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 86218ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 863ea67eedbSSteven Whitehouse .lo_name = "databuf", 864b3b94faaSDavid Teigland }; 865b3b94faaSDavid Teigland 866b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 867b3b94faaSDavid Teigland &gfs2_databuf_lops, 86816615be1SSteven Whitehouse &gfs2_buf_lops, 86916615be1SSteven Whitehouse &gfs2_rg_lops, 87016615be1SSteven Whitehouse &gfs2_revoke_lops, 871ea67eedbSSteven Whitehouse NULL, 872b3b94faaSDavid Teigland }; 873b3b94faaSDavid Teigland 874