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> 1575ca61c1SSteven Whitehouse #include <linux/mempool.h> 165c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 17c969f58cSSteven Whitehouse #include <linux/bio.h> 18c969f58cSSteven Whitehouse #include <linux/fs.h> 197f63257dSBenjamin Marzinski #include <linux/list_sort.h> 20f4686c26SAbhi Das #include <linux/blkdev.h> 21b3b94faaSDavid Teigland 22f4686c26SAbhi Das #include "bmap.h" 23c1696fb8SBob Peterson #include "dir.h" 24b3b94faaSDavid Teigland #include "gfs2.h" 255c676f6dSSteven Whitehouse #include "incore.h" 262332c443SRobert Peterson #include "inode.h" 27b3b94faaSDavid Teigland #include "glock.h" 28b3b94faaSDavid Teigland #include "log.h" 29b3b94faaSDavid Teigland #include "lops.h" 30b3b94faaSDavid Teigland #include "meta_io.h" 31b3b94faaSDavid Teigland #include "recovery.h" 32b3b94faaSDavid Teigland #include "rgrp.h" 33b3b94faaSDavid Teigland #include "trans.h" 345c676f6dSSteven Whitehouse #include "util.h" 3563997775SSteven Whitehouse #include "trace_gfs2.h" 36b3b94faaSDavid Teigland 379b9107a5SSteven Whitehouse /** 389b9107a5SSteven Whitehouse * gfs2_pin - Pin a buffer in memory 399b9107a5SSteven Whitehouse * @sdp: The superblock 409b9107a5SSteven Whitehouse * @bh: The buffer to be pinned 419b9107a5SSteven Whitehouse * 429b9107a5SSteven Whitehouse * The log lock must be held when calling this function 439b9107a5SSteven Whitehouse */ 44767f433fSSteven Whitehouse void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 459b9107a5SSteven Whitehouse { 469b9107a5SSteven Whitehouse struct gfs2_bufdata *bd; 479b9107a5SSteven Whitehouse 4829687a2aSSteven Whitehouse BUG_ON(!current->journal_info); 499b9107a5SSteven Whitehouse 509b9107a5SSteven Whitehouse clear_buffer_dirty(bh); 519b9107a5SSteven Whitehouse if (test_set_buffer_pinned(bh)) 529b9107a5SSteven Whitehouse gfs2_assert_withdraw(sdp, 0); 539b9107a5SSteven Whitehouse if (!buffer_uptodate(bh)) 549e1a9ecdSAndreas Gruenbacher gfs2_io_error_bh_wd(sdp, bh); 559b9107a5SSteven Whitehouse bd = bh->b_private; 569b9107a5SSteven Whitehouse /* If this buffer is in the AIL and it has already been written 579b9107a5SSteven Whitehouse * to in-place disk block, remove it from the AIL. 589b9107a5SSteven Whitehouse */ 59c618e87aSSteven Whitehouse spin_lock(&sdp->sd_ail_lock); 6016ca9412SBenjamin Marzinski if (bd->bd_tr) 6116ca9412SBenjamin Marzinski list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list); 62c618e87aSSteven Whitehouse spin_unlock(&sdp->sd_ail_lock); 639b9107a5SSteven Whitehouse get_bh(bh); 645e687eacSBenjamin Marzinski atomic_inc(&sdp->sd_log_pinned); 6563997775SSteven Whitehouse trace_gfs2_pin(bd, 1); 669b9107a5SSteven Whitehouse } 679b9107a5SSteven Whitehouse 687c9ca621SBob Peterson static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) 697c9ca621SBob Peterson { 707c9ca621SBob Peterson return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; 717c9ca621SBob Peterson } 727c9ca621SBob Peterson 737c9ca621SBob Peterson static void maybe_release_space(struct gfs2_bufdata *bd) 747c9ca621SBob Peterson { 757c9ca621SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 7615562c43SBob Peterson struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 776f6597baSAndreas Gruenbacher struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl); 787c9ca621SBob Peterson unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; 797c9ca621SBob Peterson struct gfs2_bitmap *bi = rgd->rd_bits + index; 807c9ca621SBob Peterson 815a7c6690SFabian Frederick if (bi->bi_clone == NULL) 827c9ca621SBob Peterson return; 837c9ca621SBob Peterson if (sdp->sd_args.ar_discard) 8466fc061bSSteven Whitehouse gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); 857c9ca621SBob Peterson memcpy(bi->bi_clone + bi->bi_offset, 86281b4952SAndreas Gruenbacher bd->bd_bh->b_data + bi->bi_offset, bi->bi_bytes); 877c9ca621SBob Peterson clear_bit(GBF_FULL, &bi->bi_flags); 887c9ca621SBob Peterson rgd->rd_free_clone = rgd->rd_free; 895ea5050cSBob Peterson rgd->rd_extfail_pt = rgd->rd_free; 907c9ca621SBob Peterson } 917c9ca621SBob Peterson 929b9107a5SSteven Whitehouse /** 939b9107a5SSteven Whitehouse * gfs2_unpin - Unpin a buffer 949b9107a5SSteven Whitehouse * @sdp: the filesystem the buffer belongs to 959b9107a5SSteven Whitehouse * @bh: The buffer to unpin 969b9107a5SSteven Whitehouse * @ai: 9729687a2aSSteven Whitehouse * @flags: The inode dirty flags 989b9107a5SSteven Whitehouse * 999b9107a5SSteven Whitehouse */ 1009b9107a5SSteven Whitehouse 1019b9107a5SSteven Whitehouse static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 10216ca9412SBenjamin Marzinski struct gfs2_trans *tr) 1039b9107a5SSteven Whitehouse { 1049b9107a5SSteven Whitehouse struct gfs2_bufdata *bd = bh->b_private; 1059b9107a5SSteven Whitehouse 10629687a2aSSteven Whitehouse BUG_ON(!buffer_uptodate(bh)); 10729687a2aSSteven Whitehouse BUG_ON(!buffer_pinned(bh)); 1089b9107a5SSteven Whitehouse 1099b9107a5SSteven Whitehouse lock_buffer(bh); 1109b9107a5SSteven Whitehouse mark_buffer_dirty(bh); 1119b9107a5SSteven Whitehouse clear_buffer_pinned(bh); 1129b9107a5SSteven Whitehouse 1137c9ca621SBob Peterson if (buffer_is_rgrp(bd)) 1147c9ca621SBob Peterson maybe_release_space(bd); 1157c9ca621SBob Peterson 116d6a079e8SDave Chinner spin_lock(&sdp->sd_ail_lock); 11716ca9412SBenjamin Marzinski if (bd->bd_tr) { 1189b9107a5SSteven Whitehouse list_del(&bd->bd_ail_st_list); 1199b9107a5SSteven Whitehouse brelse(bh); 1209b9107a5SSteven Whitehouse } else { 1219b9107a5SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 1229b9107a5SSteven Whitehouse list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 1239b9107a5SSteven Whitehouse atomic_inc(&gl->gl_ail_count); 1249b9107a5SSteven Whitehouse } 12516ca9412SBenjamin Marzinski bd->bd_tr = tr; 12616ca9412SBenjamin Marzinski list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list); 127d6a079e8SDave Chinner spin_unlock(&sdp->sd_ail_lock); 128d6a079e8SDave Chinner 12929687a2aSSteven Whitehouse clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 13063997775SSteven Whitehouse trace_gfs2_pin(bd, 0); 1319b9107a5SSteven Whitehouse unlock_buffer(bh); 1325e687eacSBenjamin Marzinski atomic_dec(&sdp->sd_log_pinned); 1339b9107a5SSteven Whitehouse } 1349b9107a5SSteven Whitehouse 135e8c92ed7SSteven Whitehouse static void gfs2_log_incr_head(struct gfs2_sbd *sdp) 13616615be1SSteven Whitehouse { 137e8c92ed7SSteven Whitehouse BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && 138e8c92ed7SSteven Whitehouse (sdp->sd_log_flush_head != sdp->sd_log_head)); 139e8c92ed7SSteven Whitehouse 140722f6f62SBob Peterson if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) 141e8c92ed7SSteven Whitehouse sdp->sd_log_flush_head = 0; 14216615be1SSteven Whitehouse } 14316615be1SSteven Whitehouse 144c1696fb8SBob Peterson u64 gfs2_log_bmap(struct gfs2_sbd *sdp) 14516615be1SSteven Whitehouse { 146e8c92ed7SSteven Whitehouse unsigned int lbn = sdp->sd_log_flush_head; 147e8c92ed7SSteven Whitehouse struct gfs2_journal_extent *je; 148e8c92ed7SSteven Whitehouse u64 block; 14916615be1SSteven Whitehouse 150b50f227bSSteven Whitehouse list_for_each_entry(je, &sdp->sd_jdesc->extent_list, list) { 151b50f227bSSteven Whitehouse if ((lbn >= je->lblock) && (lbn < (je->lblock + je->blocks))) { 152e8c92ed7SSteven Whitehouse block = je->dblock + lbn - je->lblock; 15347ac5537SSteven Whitehouse gfs2_log_incr_head(sdp); 154e8c92ed7SSteven Whitehouse return block; 155e8c92ed7SSteven Whitehouse } 156e8c92ed7SSteven Whitehouse } 15747ac5537SSteven Whitehouse 158e8c92ed7SSteven Whitehouse return -1; 15947ac5537SSteven Whitehouse } 16047ac5537SSteven Whitehouse 16147ac5537SSteven Whitehouse /** 162e8c92ed7SSteven Whitehouse * gfs2_end_log_write_bh - end log write of pagecache data with buffers 163e8c92ed7SSteven Whitehouse * @sdp: The superblock 164e8c92ed7SSteven Whitehouse * @bvec: The bio_vec 165e8c92ed7SSteven Whitehouse * @error: The i/o status 166e8c92ed7SSteven Whitehouse * 1674519eaadSBob Peterson * This finds the relevant buffers and unlocks them and sets the 168e8c92ed7SSteven Whitehouse * error flag according to the status of the i/o request. This is 169e8c92ed7SSteven Whitehouse * used when the log is writing data which has an in-place version 170e8c92ed7SSteven Whitehouse * that is pinned in the pagecache. 171e8c92ed7SSteven Whitehouse */ 172e8c92ed7SSteven Whitehouse 1736dc4f100SMing Lei static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, 1746dc4f100SMing Lei struct bio_vec *bvec, 1754e4cbee9SChristoph Hellwig blk_status_t error) 176e8c92ed7SSteven Whitehouse { 177e8c92ed7SSteven Whitehouse struct buffer_head *bh, *next; 178e8c92ed7SSteven Whitehouse struct page *page = bvec->bv_page; 179e8c92ed7SSteven Whitehouse unsigned size; 180e8c92ed7SSteven Whitehouse 181e8c92ed7SSteven Whitehouse bh = page_buffers(page); 182e8c92ed7SSteven Whitehouse size = bvec->bv_len; 183e8c92ed7SSteven Whitehouse while (bh_offset(bh) < bvec->bv_offset) 184e8c92ed7SSteven Whitehouse bh = bh->b_this_page; 185e8c92ed7SSteven Whitehouse do { 186e8c92ed7SSteven Whitehouse if (error) 18787354e5dSJeff Layton mark_buffer_write_io_error(bh); 188e8c92ed7SSteven Whitehouse unlock_buffer(bh); 189e8c92ed7SSteven Whitehouse next = bh->b_this_page; 190e8c92ed7SSteven Whitehouse size -= bh->b_size; 191e8c92ed7SSteven Whitehouse brelse(bh); 192e8c92ed7SSteven Whitehouse bh = next; 193e8c92ed7SSteven Whitehouse } while(bh && size); 194e8c92ed7SSteven Whitehouse } 195e8c92ed7SSteven Whitehouse 196e8c92ed7SSteven Whitehouse /** 197e8c92ed7SSteven Whitehouse * gfs2_end_log_write - end of i/o to the log 198e8c92ed7SSteven Whitehouse * @bio: The bio 199e8c92ed7SSteven Whitehouse * 200e8c92ed7SSteven Whitehouse * Each bio_vec contains either data from the pagecache or data 201e8c92ed7SSteven Whitehouse * relating to the log itself. Here we iterate over the bio_vec 202e8c92ed7SSteven Whitehouse * array, processing both kinds of data. 20347ac5537SSteven Whitehouse * 20447ac5537SSteven Whitehouse */ 20547ac5537SSteven Whitehouse 2064246a0b6SChristoph Hellwig static void gfs2_end_log_write(struct bio *bio) 20747ac5537SSteven Whitehouse { 208e8c92ed7SSteven Whitehouse struct gfs2_sbd *sdp = bio->bi_private; 209e8c92ed7SSteven Whitehouse struct bio_vec *bvec; 210e8c92ed7SSteven Whitehouse struct page *page; 2116dc4f100SMing Lei struct bvec_iter_all iter_all; 21247ac5537SSteven Whitehouse 213942b0cddSBob Peterson if (bio->bi_status) { 214942b0cddSBob Peterson fs_err(sdp, "Error %d writing to journal, jid=%u\n", 215942b0cddSBob Peterson bio->bi_status, sdp->sd_jdesc->jd_jid); 216942b0cddSBob Peterson wake_up(&sdp->sd_logd_waitq); 217942b0cddSBob Peterson } 218e8c92ed7SSteven Whitehouse 2192b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 220e8c92ed7SSteven Whitehouse page = bvec->bv_page; 221e8c92ed7SSteven Whitehouse if (page_has_buffers(page)) 2224e4cbee9SChristoph Hellwig gfs2_end_log_write_bh(sdp, bvec, bio->bi_status); 223e8c92ed7SSteven Whitehouse else 224e8c92ed7SSteven Whitehouse mempool_free(page, gfs2_page_pool); 225e8c92ed7SSteven Whitehouse } 226e8c92ed7SSteven Whitehouse 227e8c92ed7SSteven Whitehouse bio_put(bio); 22847ac5537SSteven Whitehouse if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 22947ac5537SSteven Whitehouse wake_up(&sdp->sd_log_flush_wait); 23047ac5537SSteven Whitehouse } 23147ac5537SSteven Whitehouse 23247ac5537SSteven Whitehouse /** 2335b846095SAbhi Das * gfs2_log_submit_bio - Submit any pending log bio 2345b846095SAbhi Das * @biop: Address of the bio pointer 235f4686c26SAbhi Das * @opf: REQ_OP | op_flags 236e8c92ed7SSteven Whitehouse * 237e8c92ed7SSteven Whitehouse * Submit any pending part-built or full bio to the block device. If 238e8c92ed7SSteven Whitehouse * there is no pending bio, then this is a no-op. 239e8c92ed7SSteven Whitehouse */ 240e8c92ed7SSteven Whitehouse 241f4686c26SAbhi Das void gfs2_log_submit_bio(struct bio **biop, int opf) 242e8c92ed7SSteven Whitehouse { 2435b846095SAbhi Das struct bio *bio = *biop; 2445b846095SAbhi Das if (bio) { 2455b846095SAbhi Das struct gfs2_sbd *sdp = bio->bi_private; 246e8c92ed7SSteven Whitehouse atomic_inc(&sdp->sd_log_in_flight); 247f4686c26SAbhi Das bio->bi_opf = opf; 2485b846095SAbhi Das submit_bio(bio); 2495b846095SAbhi Das *biop = NULL; 250e8c92ed7SSteven Whitehouse } 251e8c92ed7SSteven Whitehouse } 252e8c92ed7SSteven Whitehouse 253e8c92ed7SSteven Whitehouse /** 2545b846095SAbhi Das * gfs2_log_alloc_bio - Allocate a bio 255e8c92ed7SSteven Whitehouse * @sdp: The super block 2565b846095SAbhi Das * @blkno: The device block number we want to write to 2575b846095SAbhi Das * @end_io: The bi_end_io callback 258e8c92ed7SSteven Whitehouse * 2595b846095SAbhi Das * Allocate a new bio, initialize it with the given parameters and return it. 260e8c92ed7SSteven Whitehouse * 2615b846095SAbhi Das * Returns: The newly allocated bio 262e8c92ed7SSteven Whitehouse */ 263e8c92ed7SSteven Whitehouse 2645b846095SAbhi Das static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno, 2655b846095SAbhi Das bio_end_io_t *end_io) 266e8c92ed7SSteven Whitehouse { 267e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2685b846095SAbhi Das struct bio *bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES); 269e8c92ed7SSteven Whitehouse 2704f024f37SKent Overstreet bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9); 27174d46992SChristoph Hellwig bio_set_dev(bio, sb->s_bdev); 2725b846095SAbhi Das bio->bi_end_io = end_io; 273e8c92ed7SSteven Whitehouse bio->bi_private = sdp; 274e8c92ed7SSteven Whitehouse 275e8c92ed7SSteven Whitehouse return bio; 276e8c92ed7SSteven Whitehouse } 277e8c92ed7SSteven Whitehouse 278e8c92ed7SSteven Whitehouse /** 279e8c92ed7SSteven Whitehouse * gfs2_log_get_bio - Get cached log bio, or allocate a new one 280e8c92ed7SSteven Whitehouse * @sdp: The super block 281e8c92ed7SSteven Whitehouse * @blkno: The device block number we want to write to 2825b846095SAbhi Das * @bio: The bio to get or allocate 2835b846095SAbhi Das * @op: REQ_OP 2845b846095SAbhi Das * @end_io: The bi_end_io callback 2855b846095SAbhi Das * @flush: Always flush the current bio and allocate a new one? 286e8c92ed7SSteven Whitehouse * 287e8c92ed7SSteven Whitehouse * If there is a cached bio, then if the next block number is sequential 288e8c92ed7SSteven Whitehouse * with the previous one, return it, otherwise flush the bio to the 2895b846095SAbhi Das * device. If there is no cached bio, or we just flushed it, then 290e8c92ed7SSteven Whitehouse * allocate a new one. 291e8c92ed7SSteven Whitehouse * 292e8c92ed7SSteven Whitehouse * Returns: The bio to use for log writes 293e8c92ed7SSteven Whitehouse */ 294e8c92ed7SSteven Whitehouse 2955b846095SAbhi Das static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno, 2965b846095SAbhi Das struct bio **biop, int op, 2975b846095SAbhi Das bio_end_io_t *end_io, bool flush) 298e8c92ed7SSteven Whitehouse { 2995b846095SAbhi Das struct bio *bio = *biop; 300e8c92ed7SSteven Whitehouse 301e8c92ed7SSteven Whitehouse if (bio) { 3025b846095SAbhi Das u64 nblk; 3035b846095SAbhi Das 304f73a1c7dSKent Overstreet nblk = bio_end_sector(bio); 305e8c92ed7SSteven Whitehouse nblk >>= sdp->sd_fsb2bb_shift; 3065b846095SAbhi Das if (blkno == nblk && !flush) 307e8c92ed7SSteven Whitehouse return bio; 308f4686c26SAbhi Das gfs2_log_submit_bio(biop, op); 309e8c92ed7SSteven Whitehouse } 310e8c92ed7SSteven Whitehouse 3115b846095SAbhi Das *biop = gfs2_log_alloc_bio(sdp, blkno, end_io); 3125b846095SAbhi Das return *biop; 313e8c92ed7SSteven Whitehouse } 314e8c92ed7SSteven Whitehouse 315e8c92ed7SSteven Whitehouse /** 316e8c92ed7SSteven Whitehouse * gfs2_log_write - write to log 31747ac5537SSteven Whitehouse * @sdp: the filesystem 318e8c92ed7SSteven Whitehouse * @page: the page to write 319e8c92ed7SSteven Whitehouse * @size: the size of the data to write 320e8c92ed7SSteven Whitehouse * @offset: the offset within the page 321c1696fb8SBob Peterson * @blkno: block number of the log entry 32247ac5537SSteven Whitehouse * 323e8c92ed7SSteven Whitehouse * Try and add the page segment to the current bio. If that fails, 324e8c92ed7SSteven Whitehouse * submit the current bio to the device and create a new one, and 325e8c92ed7SSteven Whitehouse * then add the page segment to that. 32647ac5537SSteven Whitehouse */ 32747ac5537SSteven Whitehouse 328c1696fb8SBob Peterson void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, 329c1696fb8SBob Peterson unsigned size, unsigned offset, u64 blkno) 33047ac5537SSteven Whitehouse { 331e8c92ed7SSteven Whitehouse struct bio *bio; 332e8c92ed7SSteven Whitehouse int ret; 33347ac5537SSteven Whitehouse 3345b846095SAbhi Das bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio, REQ_OP_WRITE, 3355b846095SAbhi Das gfs2_end_log_write, false); 336e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 337e8c92ed7SSteven Whitehouse if (ret == 0) { 3385b846095SAbhi Das bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio, 3395b846095SAbhi Das REQ_OP_WRITE, gfs2_end_log_write, true); 340e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 341e8c92ed7SSteven Whitehouse WARN_ON(ret == 0); 342e8c92ed7SSteven Whitehouse } 34347ac5537SSteven Whitehouse } 34416615be1SSteven Whitehouse 345e8c92ed7SSteven Whitehouse /** 346e8c92ed7SSteven Whitehouse * gfs2_log_write_bh - write a buffer's content to the log 347e8c92ed7SSteven Whitehouse * @sdp: The super block 348e8c92ed7SSteven Whitehouse * @bh: The buffer pointing to the in-place location 349e8c92ed7SSteven Whitehouse * 350e8c92ed7SSteven Whitehouse * This writes the content of the buffer to the next available location 351e8c92ed7SSteven Whitehouse * in the log. The buffer will be unlocked once the i/o to the log has 352e8c92ed7SSteven Whitehouse * completed. 353e8c92ed7SSteven Whitehouse */ 354e8c92ed7SSteven Whitehouse 355e8c92ed7SSteven Whitehouse static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) 35616615be1SSteven Whitehouse { 357c1696fb8SBob Peterson gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh), 358c1696fb8SBob Peterson gfs2_log_bmap(sdp)); 359e8c92ed7SSteven Whitehouse } 360e8c92ed7SSteven Whitehouse 361e8c92ed7SSteven Whitehouse /** 362e8c92ed7SSteven Whitehouse * gfs2_log_write_page - write one block stored in a page, into the log 363e8c92ed7SSteven Whitehouse * @sdp: The superblock 364e8c92ed7SSteven Whitehouse * @page: The struct page 365e8c92ed7SSteven Whitehouse * 366e8c92ed7SSteven Whitehouse * This writes the first block-sized part of the page into the log. Note 367e8c92ed7SSteven Whitehouse * that the page must have been allocated from the gfs2_page_pool mempool 368e8c92ed7SSteven Whitehouse * and that after this has been called, ownership has been transferred and 369e8c92ed7SSteven Whitehouse * the page may be freed at any time. 370e8c92ed7SSteven Whitehouse */ 371e8c92ed7SSteven Whitehouse 372e8c92ed7SSteven Whitehouse void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) 373e8c92ed7SSteven Whitehouse { 374e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 375c1696fb8SBob Peterson gfs2_log_write(sdp, page, sb->s_blocksize, 0, 376c1696fb8SBob Peterson gfs2_log_bmap(sdp)); 377e8c92ed7SSteven Whitehouse } 378e8c92ed7SSteven Whitehouse 379f4686c26SAbhi Das /** 380f4686c26SAbhi Das * gfs2_end_log_read - end I/O callback for reads from the log 381f4686c26SAbhi Das * @bio: The bio 382f4686c26SAbhi Das * 383f4686c26SAbhi Das * Simply unlock the pages in the bio. The main thread will wait on them and 384f4686c26SAbhi Das * process them in order as necessary. 385f4686c26SAbhi Das */ 386f4686c26SAbhi Das 387f4686c26SAbhi Das static void gfs2_end_log_read(struct bio *bio) 388f4686c26SAbhi Das { 389f4686c26SAbhi Das struct page *page; 390f4686c26SAbhi Das struct bio_vec *bvec; 391f4686c26SAbhi Das struct bvec_iter_all iter_all; 392f4686c26SAbhi Das 393ef75bd71SLinus Torvalds bio_for_each_segment_all(bvec, bio, iter_all) { 394f4686c26SAbhi Das page = bvec->bv_page; 395f4686c26SAbhi Das if (bio->bi_status) { 396f4686c26SAbhi Das int err = blk_status_to_errno(bio->bi_status); 397f4686c26SAbhi Das 398f4686c26SAbhi Das SetPageError(page); 399f4686c26SAbhi Das mapping_set_error(page->mapping, err); 400f4686c26SAbhi Das } 401f4686c26SAbhi Das unlock_page(page); 402f4686c26SAbhi Das } 403f4686c26SAbhi Das 404f4686c26SAbhi Das bio_put(bio); 405f4686c26SAbhi Das } 406f4686c26SAbhi Das 407f4686c26SAbhi Das /** 408f4686c26SAbhi Das * gfs2_jhead_pg_srch - Look for the journal head in a given page. 409f4686c26SAbhi Das * @jd: The journal descriptor 410f4686c26SAbhi Das * @page: The page to look in 411f4686c26SAbhi Das * 412f4686c26SAbhi Das * Returns: 1 if found, 0 otherwise. 413f4686c26SAbhi Das */ 414f4686c26SAbhi Das 415f4686c26SAbhi Das static bool gfs2_jhead_pg_srch(struct gfs2_jdesc *jd, 416f4686c26SAbhi Das struct gfs2_log_header_host *head, 417f4686c26SAbhi Das struct page *page) 418f4686c26SAbhi Das { 419f4686c26SAbhi Das struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 420f4686c26SAbhi Das struct gfs2_log_header_host uninitialized_var(lh); 421f4686c26SAbhi Das void *kaddr = kmap_atomic(page); 422f4686c26SAbhi Das unsigned int offset; 423f4686c26SAbhi Das bool ret = false; 424f4686c26SAbhi Das 425f4686c26SAbhi Das for (offset = 0; offset < PAGE_SIZE; offset += sdp->sd_sb.sb_bsize) { 426f4686c26SAbhi Das if (!__get_log_header(sdp, kaddr + offset, 0, &lh)) { 427f4686c26SAbhi Das if (lh.lh_sequence > head->lh_sequence) 428f4686c26SAbhi Das *head = lh; 429f4686c26SAbhi Das else { 430f4686c26SAbhi Das ret = true; 431f4686c26SAbhi Das break; 432f4686c26SAbhi Das } 433f4686c26SAbhi Das } 434f4686c26SAbhi Das } 435f4686c26SAbhi Das kunmap_atomic(kaddr); 436f4686c26SAbhi Das return ret; 437f4686c26SAbhi Das } 438f4686c26SAbhi Das 439f4686c26SAbhi Das /** 440f4686c26SAbhi Das * gfs2_jhead_process_page - Search/cleanup a page 441f4686c26SAbhi Das * @jd: The journal descriptor 442f4686c26SAbhi Das * @index: Index of the page to look into 443f4686c26SAbhi Das * @done: If set, perform only cleanup, else search and set if found. 444f4686c26SAbhi Das * 445f4686c26SAbhi Das * Find the page with 'index' in the journal's mapping. Search the page for 446f4686c26SAbhi Das * the journal head if requested (cleanup == false). Release refs on the 447f4686c26SAbhi Das * page so the page cache can reclaim it (put_page() twice). We grabbed a 448f4686c26SAbhi Das * reference on this page two times, first when we did a find_or_create_page() 449f4686c26SAbhi Das * to obtain the page to add it to the bio and second when we do a 450f4686c26SAbhi Das * find_get_page() here to get the page to wait on while I/O on it is being 451f4686c26SAbhi Das * completed. 452f4686c26SAbhi Das * This function is also used to free up a page we might've grabbed but not 453f4686c26SAbhi Das * used. Maybe we added it to a bio, but not submitted it for I/O. Or we 454f4686c26SAbhi Das * submitted the I/O, but we already found the jhead so we only need to drop 455f4686c26SAbhi Das * our references to the page. 456f4686c26SAbhi Das */ 457f4686c26SAbhi Das 458f4686c26SAbhi Das static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index, 459f4686c26SAbhi Das struct gfs2_log_header_host *head, 460f4686c26SAbhi Das bool *done) 461f4686c26SAbhi Das { 462f4686c26SAbhi Das struct page *page; 463f4686c26SAbhi Das 464f4686c26SAbhi Das page = find_get_page(jd->jd_inode->i_mapping, index); 465f4686c26SAbhi Das wait_on_page_locked(page); 466f4686c26SAbhi Das 467f4686c26SAbhi Das if (PageError(page)) 468f4686c26SAbhi Das *done = true; 469f4686c26SAbhi Das 470f4686c26SAbhi Das if (!*done) 471f4686c26SAbhi Das *done = gfs2_jhead_pg_srch(jd, head, page); 472f4686c26SAbhi Das 473f4686c26SAbhi Das put_page(page); /* Once for find_get_page */ 474f4686c26SAbhi Das put_page(page); /* Once more for find_or_create_page */ 475f4686c26SAbhi Das } 476f4686c26SAbhi Das 477f4686c26SAbhi Das /** 478f4686c26SAbhi Das * gfs2_find_jhead - find the head of a log 479f4686c26SAbhi Das * @jd: The journal descriptor 480f4686c26SAbhi Das * @head: The log descriptor for the head of the log is returned here 481f4686c26SAbhi Das * 482f4686c26SAbhi Das * Do a search of a journal by reading it in large chunks using bios and find 483f4686c26SAbhi Das * the valid log entry with the highest sequence number. (i.e. the log head) 484f4686c26SAbhi Das * 485f4686c26SAbhi Das * Returns: 0 on success, errno otherwise 486f4686c26SAbhi Das */ 487f4686c26SAbhi Das int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head, 488f4686c26SAbhi Das bool keep_cache) 489f4686c26SAbhi Das { 490f4686c26SAbhi Das struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 491f4686c26SAbhi Das struct address_space *mapping = jd->jd_inode->i_mapping; 492f4686c26SAbhi Das unsigned int block = 0, blocks_submitted = 0, blocks_read = 0; 493f4686c26SAbhi Das unsigned int bsize = sdp->sd_sb.sb_bsize; 494f4686c26SAbhi Das unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift; 495f4686c26SAbhi Das unsigned int shift = PAGE_SHIFT - bsize_shift; 496f4686c26SAbhi Das unsigned int readhead_blocks = BIO_MAX_PAGES << shift; 497f4686c26SAbhi Das struct gfs2_journal_extent *je; 498f4686c26SAbhi Das int sz, ret = 0; 499f4686c26SAbhi Das struct bio *bio = NULL; 500f4686c26SAbhi Das struct page *page = NULL; 501f4686c26SAbhi Das bool done = false; 502f4686c26SAbhi Das errseq_t since; 503f4686c26SAbhi Das 504f4686c26SAbhi Das memset(head, 0, sizeof(*head)); 505f4686c26SAbhi Das if (list_empty(&jd->extent_list)) 506f4686c26SAbhi Das gfs2_map_journal_extents(sdp, jd); 507f4686c26SAbhi Das 508f4686c26SAbhi Das since = filemap_sample_wb_err(mapping); 509f4686c26SAbhi Das list_for_each_entry(je, &jd->extent_list, list) { 510f4686c26SAbhi Das for (; block < je->lblock + je->blocks; block++) { 511f4686c26SAbhi Das u64 dblock; 512f4686c26SAbhi Das 513f4686c26SAbhi Das if (!page) { 514f4686c26SAbhi Das page = find_or_create_page(mapping, 515f4686c26SAbhi Das block >> shift, GFP_NOFS); 516f4686c26SAbhi Das if (!page) { 517f4686c26SAbhi Das ret = -ENOMEM; 518f4686c26SAbhi Das done = true; 519f4686c26SAbhi Das goto out; 520f4686c26SAbhi Das } 521f4686c26SAbhi Das } 522f4686c26SAbhi Das 523f4686c26SAbhi Das if (bio) { 524f4686c26SAbhi Das unsigned int off; 525f4686c26SAbhi Das 526f4686c26SAbhi Das off = (block << bsize_shift) & ~PAGE_MASK; 527f4686c26SAbhi Das sz = bio_add_page(bio, page, bsize, off); 528f4686c26SAbhi Das if (sz == bsize) { /* block added */ 529f4686c26SAbhi Das if (off + bsize == PAGE_SIZE) { 530f4686c26SAbhi Das page = NULL; 531f4686c26SAbhi Das goto page_added; 532f4686c26SAbhi Das } 533f4686c26SAbhi Das continue; 534f4686c26SAbhi Das } 535f4686c26SAbhi Das blocks_submitted = block + 1; 536f4686c26SAbhi Das submit_bio(bio); 537f4686c26SAbhi Das bio = NULL; 538f4686c26SAbhi Das } 539f4686c26SAbhi Das 540f4686c26SAbhi Das dblock = je->dblock + (block - je->lblock); 541f4686c26SAbhi Das bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read); 542f4686c26SAbhi Das bio->bi_opf = REQ_OP_READ; 543f4686c26SAbhi Das sz = bio_add_page(bio, page, bsize, 0); 544f4686c26SAbhi Das gfs2_assert_warn(sdp, sz == bsize); 545f4686c26SAbhi Das if (bsize == PAGE_SIZE) 546f4686c26SAbhi Das page = NULL; 547f4686c26SAbhi Das 548f4686c26SAbhi Das page_added: 549f4686c26SAbhi Das if (blocks_submitted < blocks_read + readhead_blocks) { 550f4686c26SAbhi Das /* Keep at least one bio in flight */ 551f4686c26SAbhi Das continue; 552f4686c26SAbhi Das } 553f4686c26SAbhi Das 554f4686c26SAbhi Das gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done); 555f4686c26SAbhi Das blocks_read += PAGE_SIZE >> bsize_shift; 556f4686c26SAbhi Das if (done) 557f4686c26SAbhi Das goto out; /* found */ 558f4686c26SAbhi Das } 559f4686c26SAbhi Das } 560f4686c26SAbhi Das 561f4686c26SAbhi Das out: 562f4686c26SAbhi Das if (bio) 563f4686c26SAbhi Das submit_bio(bio); 564f4686c26SAbhi Das while (blocks_read < block) { 565f4686c26SAbhi Das gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done); 566f4686c26SAbhi Das blocks_read += PAGE_SIZE >> bsize_shift; 567f4686c26SAbhi Das } 568f4686c26SAbhi Das 569f4686c26SAbhi Das if (!ret) 570f4686c26SAbhi Das ret = filemap_check_wb_err(mapping, since); 571f4686c26SAbhi Das 572f4686c26SAbhi Das if (!keep_cache) 573f4686c26SAbhi Das truncate_inode_pages(mapping, 0); 574f4686c26SAbhi Das 575f4686c26SAbhi Das return ret; 576f4686c26SAbhi Das } 577f4686c26SAbhi Das 578dad30e90SSteven Whitehouse static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, 579dad30e90SSteven Whitehouse u32 ld_length, u32 ld_data1) 580e8c92ed7SSteven Whitehouse { 581144a4c2fSSteven Whitehouse struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 582e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld = page_address(page); 583e8c92ed7SSteven Whitehouse clear_page(ld); 58416615be1SSteven Whitehouse ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 58516615be1SSteven Whitehouse ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 58616615be1SSteven Whitehouse ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 58716615be1SSteven Whitehouse ld->ld_type = cpu_to_be32(ld_type); 588dad30e90SSteven Whitehouse ld->ld_length = cpu_to_be32(ld_length); 589dad30e90SSteven Whitehouse ld->ld_data1 = cpu_to_be32(ld_data1); 59016615be1SSteven Whitehouse ld->ld_data2 = 0; 591e8c92ed7SSteven Whitehouse return page; 59216615be1SSteven Whitehouse } 59316615be1SSteven Whitehouse 594dad30e90SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 595dad30e90SSteven Whitehouse { 596dad30e90SSteven Whitehouse void *kaddr; 597dad30e90SSteven Whitehouse __be32 *ptr; 598dad30e90SSteven Whitehouse 599dad30e90SSteven Whitehouse clear_buffer_escaped(bh); 600dad30e90SSteven Whitehouse kaddr = kmap_atomic(bh->b_page); 601dad30e90SSteven Whitehouse ptr = kaddr + bh_offset(bh); 602dad30e90SSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 603dad30e90SSteven Whitehouse set_buffer_escaped(bh); 604dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 605dad30e90SSteven Whitehouse } 606dad30e90SSteven Whitehouse 6077f63257dSBenjamin Marzinski static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) 6087f63257dSBenjamin Marzinski { 6097f63257dSBenjamin Marzinski struct gfs2_bufdata *bda, *bdb; 6107f63257dSBenjamin Marzinski 6117f63257dSBenjamin Marzinski bda = list_entry(a, struct gfs2_bufdata, bd_list); 6127f63257dSBenjamin Marzinski bdb = list_entry(b, struct gfs2_bufdata, bd_list); 6137f63257dSBenjamin Marzinski 6147f63257dSBenjamin Marzinski if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr) 6157f63257dSBenjamin Marzinski return -1; 6167f63257dSBenjamin Marzinski if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr) 6177f63257dSBenjamin Marzinski return 1; 6187f63257dSBenjamin Marzinski return 0; 6197f63257dSBenjamin Marzinski } 6207f63257dSBenjamin Marzinski 621dad30e90SSteven Whitehouse static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, 622dad30e90SSteven Whitehouse unsigned int total, struct list_head *blist, 623dad30e90SSteven Whitehouse bool is_databuf) 624b3b94faaSDavid Teigland { 625b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 626b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 627e8c92ed7SSteven Whitehouse struct page *page; 628b3b94faaSDavid Teigland unsigned int num; 629b3b94faaSDavid Teigland unsigned n; 630b3b94faaSDavid Teigland __be64 *ptr; 631b3b94faaSDavid Teigland 632905d2aefSBob Peterson gfs2_log_lock(sdp); 6337f63257dSBenjamin Marzinski list_sort(NULL, blist, blocknr_cmp); 634c0752aa7SBob Peterson bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list); 635b3b94faaSDavid Teigland while(total) { 636b3b94faaSDavid Teigland num = total; 637b3b94faaSDavid Teigland if (total > limit) 638b3b94faaSDavid Teigland num = limit; 639905d2aefSBob Peterson gfs2_log_unlock(sdp); 6404a586812SBob Peterson page = gfs2_get_log_desc(sdp, 6414a586812SBob Peterson is_databuf ? GFS2_LOG_DESC_JDATA : 6424a586812SBob Peterson GFS2_LOG_DESC_METADATA, num + 1, num); 643e8c92ed7SSteven Whitehouse ld = page_address(page); 644905d2aefSBob Peterson gfs2_log_lock(sdp); 645e8c92ed7SSteven Whitehouse ptr = (__be64 *)(ld + 1); 646b3b94faaSDavid Teigland 647b3b94faaSDavid Teigland n = 0; 648c0752aa7SBob Peterson list_for_each_entry_continue(bd1, blist, bd_list) { 649b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 650dad30e90SSteven Whitehouse if (is_databuf) { 651dad30e90SSteven Whitehouse gfs2_check_magic(bd1->bd_bh); 652dad30e90SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); 653dad30e90SSteven Whitehouse } 654b3b94faaSDavid Teigland if (++n >= num) 655b3b94faaSDavid Teigland break; 656b3b94faaSDavid Teigland } 657b3b94faaSDavid Teigland 658905d2aefSBob Peterson gfs2_log_unlock(sdp); 659e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 660905d2aefSBob Peterson gfs2_log_lock(sdp); 661b3b94faaSDavid Teigland 662b3b94faaSDavid Teigland n = 0; 663c0752aa7SBob Peterson list_for_each_entry_continue(bd2, blist, bd_list) { 66416615be1SSteven Whitehouse get_bh(bd2->bd_bh); 665905d2aefSBob Peterson gfs2_log_unlock(sdp); 66616615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 667dad30e90SSteven Whitehouse 668dad30e90SSteven Whitehouse if (buffer_escaped(bd2->bd_bh)) { 669dad30e90SSteven Whitehouse void *kaddr; 670dad30e90SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 671dad30e90SSteven Whitehouse ptr = page_address(page); 672dad30e90SSteven Whitehouse kaddr = kmap_atomic(bd2->bd_bh->b_page); 673dad30e90SSteven Whitehouse memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), 674dad30e90SSteven Whitehouse bd2->bd_bh->b_size); 675dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 676dad30e90SSteven Whitehouse *(__be32 *)ptr = 0; 677dad30e90SSteven Whitehouse clear_buffer_escaped(bd2->bd_bh); 678dad30e90SSteven Whitehouse unlock_buffer(bd2->bd_bh); 679dad30e90SSteven Whitehouse brelse(bd2->bd_bh); 680dad30e90SSteven Whitehouse gfs2_log_write_page(sdp, page); 681dad30e90SSteven Whitehouse } else { 682e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd2->bd_bh); 683dad30e90SSteven Whitehouse } 684905d2aefSBob Peterson gfs2_log_lock(sdp); 685b3b94faaSDavid Teigland if (++n >= num) 686b3b94faaSDavid Teigland break; 687b3b94faaSDavid Teigland } 688b3b94faaSDavid Teigland 689905d2aefSBob Peterson BUG_ON(total < num); 690b3b94faaSDavid Teigland total -= num; 691b3b94faaSDavid Teigland } 692905d2aefSBob Peterson gfs2_log_unlock(sdp); 693b3b94faaSDavid Teigland } 694b3b94faaSDavid Teigland 695d69a3c65SSteven Whitehouse static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 696dad30e90SSteven Whitehouse { 697dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ 698022ef4feSSteven Whitehouse unsigned int nbuf; 699d69a3c65SSteven Whitehouse if (tr == NULL) 700d69a3c65SSteven Whitehouse return; 701022ef4feSSteven Whitehouse nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm; 702022ef4feSSteven Whitehouse gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0); 703dad30e90SSteven Whitehouse } 704dad30e90SSteven Whitehouse 70516ca9412SBenjamin Marzinski static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 706b3b94faaSDavid Teigland { 707d69a3c65SSteven Whitehouse struct list_head *head; 708b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 709b3b94faaSDavid Teigland 710d69a3c65SSteven Whitehouse if (tr == NULL) 71116ca9412SBenjamin Marzinski return; 71216ca9412SBenjamin Marzinski 713d69a3c65SSteven Whitehouse head = &tr->tr_buf; 714b3b94faaSDavid Teigland while (!list_empty(head)) { 715c0752aa7SBob Peterson bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 716c0752aa7SBob Peterson list_del_init(&bd->bd_list); 71716ca9412SBenjamin Marzinski gfs2_unpin(sdp, bd->bd_bh, tr); 718b3b94faaSDavid Teigland } 719b3b94faaSDavid Teigland } 720b3b94faaSDavid Teigland 721b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 72255167622SAl Viro struct gfs2_log_header_host *head, int pass) 723b3b94faaSDavid Teigland { 724b3b94faaSDavid Teigland if (pass != 0) 725b3b94faaSDavid Teigland return; 726b3b94faaSDavid Teigland 727a17d758bSBob Peterson jd->jd_found_blocks = 0; 728a17d758bSBob Peterson jd->jd_replayed_blocks = 0; 729b3b94faaSDavid Teigland } 730b3b94faaSDavid Teigland 7317c70b896SBob Peterson static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 732b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 733b3b94faaSDavid Teigland int pass) 734b3b94faaSDavid Teigland { 735feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 736feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 7375c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 738b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 739b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 740cd915493SSteven Whitehouse u64 blkno; 741b3b94faaSDavid Teigland int error = 0; 742b3b94faaSDavid Teigland 743b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 744b3b94faaSDavid Teigland return 0; 745b3b94faaSDavid Teigland 746e1cb6be9SBob Peterson gfs2_replay_incr_blk(jd, &start); 747b3b94faaSDavid Teigland 748e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 749b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 750b3b94faaSDavid Teigland 751a17d758bSBob Peterson jd->jd_found_blocks++; 752b3b94faaSDavid Teigland 753a17d758bSBob Peterson if (gfs2_revoke_check(jd, blkno, start)) 754b3b94faaSDavid Teigland continue; 755b3b94faaSDavid Teigland 756b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 757b3b94faaSDavid Teigland if (error) 758b3b94faaSDavid Teigland return error; 759b3b94faaSDavid Teigland 760b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 761b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 762b3b94faaSDavid Teigland 763b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 764b3b94faaSDavid Teigland error = -EIO; 765b3b94faaSDavid Teigland else 766b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 767b3b94faaSDavid Teigland 768b3b94faaSDavid Teigland brelse(bh_log); 769b3b94faaSDavid Teigland brelse(bh_ip); 770b3b94faaSDavid Teigland 771b3b94faaSDavid Teigland if (error) 772b3b94faaSDavid Teigland break; 773b3b94faaSDavid Teigland 774a17d758bSBob Peterson jd->jd_replayed_blocks++; 775b3b94faaSDavid Teigland } 776b3b94faaSDavid Teigland 777b3b94faaSDavid Teigland return error; 778b3b94faaSDavid Teigland } 779b3b94faaSDavid Teigland 7807c0ef28aSSteven Whitehouse /** 7817c0ef28aSSteven Whitehouse * gfs2_meta_sync - Sync all buffers associated with a glock 7827c0ef28aSSteven Whitehouse * @gl: The glock 7837c0ef28aSSteven Whitehouse * 7847c0ef28aSSteven Whitehouse */ 7857c0ef28aSSteven Whitehouse 7867c0ef28aSSteven Whitehouse static void gfs2_meta_sync(struct gfs2_glock *gl) 7877c0ef28aSSteven Whitehouse { 7887c0ef28aSSteven Whitehouse struct address_space *mapping = gfs2_glock2aspace(gl); 78915562c43SBob Peterson struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 7907c0ef28aSSteven Whitehouse int error; 7917c0ef28aSSteven Whitehouse 79270d4ee94SSteven Whitehouse if (mapping == NULL) 79370d4ee94SSteven Whitehouse mapping = &sdp->sd_aspace; 79470d4ee94SSteven Whitehouse 7957c0ef28aSSteven Whitehouse filemap_fdatawrite(mapping); 7967c0ef28aSSteven Whitehouse error = filemap_fdatawait(mapping); 7977c0ef28aSSteven Whitehouse 7987c0ef28aSSteven Whitehouse if (error) 79915562c43SBob Peterson gfs2_io_error(gl->gl_name.ln_sbd); 8007c0ef28aSSteven Whitehouse } 8017c0ef28aSSteven Whitehouse 802b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 803b3b94faaSDavid Teigland { 804feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 805feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 806b3b94faaSDavid Teigland 807b3b94faaSDavid Teigland if (error) { 8087276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 809b3b94faaSDavid Teigland return; 810b3b94faaSDavid Teigland } 811b3b94faaSDavid Teigland if (pass != 1) 812b3b94faaSDavid Teigland return; 813b3b94faaSDavid Teigland 8147276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 815b3b94faaSDavid Teigland 816b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 817a17d758bSBob Peterson jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 818b3b94faaSDavid Teigland } 819b3b94faaSDavid Teigland 820d69a3c65SSteven Whitehouse static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 821b3b94faaSDavid Teigland { 822b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 823b3b94faaSDavid Teigland unsigned int offset; 824a5b1d3fcSAndreas Gruenbacher struct list_head *head = &sdp->sd_log_revokes; 82582e86087SSteven Whitehouse struct gfs2_bufdata *bd; 826e8c92ed7SSteven Whitehouse struct page *page; 827dad30e90SSteven Whitehouse unsigned int length; 828b3b94faaSDavid Teigland 8295d054964SBenjamin Marzinski gfs2_write_revokes(sdp); 830b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 831b3b94faaSDavid Teigland return; 832b3b94faaSDavid Teigland 833dad30e90SSteven Whitehouse length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 834dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 835b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 836b3b94faaSDavid Teigland 837c0752aa7SBob Peterson list_for_each_entry(bd, head, bd_list) { 838b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 839b3b94faaSDavid Teigland 840cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 841b3b94faaSDavid Teigland 842e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 843e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 844e8c92ed7SSteven Whitehouse mh = page_address(page); 845e8c92ed7SSteven Whitehouse clear_page(mh); 846b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 847e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 848e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 849b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 850b3b94faaSDavid Teigland } 851b3b94faaSDavid Teigland 852e8c92ed7SSteven Whitehouse *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 853cd915493SSteven Whitehouse offset += sizeof(u64); 854b3b94faaSDavid Teigland } 855b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 856b3b94faaSDavid Teigland 857e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 858b3b94faaSDavid Teigland } 859b3b94faaSDavid Teigland 86016ca9412SBenjamin Marzinski static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 861f42ab085SSteven Whitehouse { 862a5b1d3fcSAndreas Gruenbacher struct list_head *head = &sdp->sd_log_revokes; 863638803d4SBob Peterson struct gfs2_bufdata *bd; 864638803d4SBob Peterson struct gfs2_glock *gl; 865f42ab085SSteven Whitehouse 866638803d4SBob Peterson while (!list_empty(head)) { 867638803d4SBob Peterson bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 868638803d4SBob Peterson list_del_init(&bd->bd_list); 869638803d4SBob Peterson gl = bd->bd_gl; 870638803d4SBob Peterson if (atomic_dec_return(&gl->gl_revokes) == 0) { 871f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 8729287c645SAndreas Gruenbacher gfs2_glock_queue_put(gl); 8739287c645SAndreas Gruenbacher } 874638803d4SBob Peterson kmem_cache_free(gfs2_bufdata_cachep, bd); 875638803d4SBob Peterson } 876f42ab085SSteven Whitehouse } 877f42ab085SSteven Whitehouse 878b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 87955167622SAl Viro struct gfs2_log_header_host *head, int pass) 880b3b94faaSDavid Teigland { 881b3b94faaSDavid Teigland if (pass != 0) 882b3b94faaSDavid Teigland return; 883b3b94faaSDavid Teigland 884a17d758bSBob Peterson jd->jd_found_revokes = 0; 885a17d758bSBob Peterson jd->jd_replay_tail = head->lh_tail; 886b3b94faaSDavid Teigland } 887b3b94faaSDavid Teigland 8887c70b896SBob Peterson static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 889b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 890b3b94faaSDavid Teigland int pass) 891b3b94faaSDavid Teigland { 892feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 893b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 894b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 895b3b94faaSDavid Teigland struct buffer_head *bh; 896b3b94faaSDavid Teigland unsigned int offset; 897cd915493SSteven Whitehouse u64 blkno; 898b3b94faaSDavid Teigland int first = 1; 899b3b94faaSDavid Teigland int error; 900b3b94faaSDavid Teigland 901b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 902b3b94faaSDavid Teigland return 0; 903b3b94faaSDavid Teigland 904b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 905b3b94faaSDavid Teigland 906e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 907b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 908b3b94faaSDavid Teigland if (error) 909b3b94faaSDavid Teigland return error; 910b3b94faaSDavid Teigland 911b3b94faaSDavid Teigland if (!first) 912b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 913b3b94faaSDavid Teigland 914cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 915b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 916b3b94faaSDavid Teigland 917a17d758bSBob Peterson error = gfs2_revoke_add(jd, blkno, start); 9183ad62e87SBob Peterson if (error < 0) { 9193ad62e87SBob Peterson brelse(bh); 920b3b94faaSDavid Teigland return error; 9213ad62e87SBob Peterson } 922b3b94faaSDavid Teigland else if (error) 923a17d758bSBob Peterson jd->jd_found_revokes++; 924b3b94faaSDavid Teigland 925b3b94faaSDavid Teigland if (!--revokes) 926b3b94faaSDavid Teigland break; 927cd915493SSteven Whitehouse offset += sizeof(u64); 928b3b94faaSDavid Teigland } 929b3b94faaSDavid Teigland 930b3b94faaSDavid Teigland brelse(bh); 931b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 932b3b94faaSDavid Teigland first = 0; 933b3b94faaSDavid Teigland } 934b3b94faaSDavid Teigland 935b3b94faaSDavid Teigland return 0; 936b3b94faaSDavid Teigland } 937b3b94faaSDavid Teigland 938b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 939b3b94faaSDavid Teigland { 940feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 941b3b94faaSDavid Teigland 942b3b94faaSDavid Teigland if (error) { 943a17d758bSBob Peterson gfs2_revoke_clean(jd); 944b3b94faaSDavid Teigland return; 945b3b94faaSDavid Teigland } 946b3b94faaSDavid Teigland if (pass != 1) 947b3b94faaSDavid Teigland return; 948b3b94faaSDavid Teigland 949b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 950a17d758bSBob Peterson jd->jd_jid, jd->jd_found_revokes); 951b3b94faaSDavid Teigland 952a17d758bSBob Peterson gfs2_revoke_clean(jd); 953b3b94faaSDavid Teigland } 954b3b94faaSDavid Teigland 95518ec7d5cSSteven Whitehouse /** 95618ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 95718ec7d5cSSteven Whitehouse * 95818ec7d5cSSteven Whitehouse */ 959d7b616e2SSteven Whitehouse 960d69a3c65SSteven Whitehouse static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 961b3b94faaSDavid Teigland { 962022ef4feSSteven Whitehouse unsigned int limit = databuf_limit(sdp); 963022ef4feSSteven Whitehouse unsigned int nbuf; 964d69a3c65SSteven Whitehouse if (tr == NULL) 965d69a3c65SSteven Whitehouse return; 966022ef4feSSteven Whitehouse nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm; 967022ef4feSSteven Whitehouse gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1); 968b3b94faaSDavid Teigland } 969b3b94faaSDavid Teigland 9707c70b896SBob Peterson static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 97118ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 97218ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 97318ec7d5cSSteven Whitehouse { 974feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 9755c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 97618ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 97718ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 978cd915493SSteven Whitehouse u64 blkno; 979cd915493SSteven Whitehouse u64 esc; 98018ec7d5cSSteven Whitehouse int error = 0; 98118ec7d5cSSteven Whitehouse 98218ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 98318ec7d5cSSteven Whitehouse return 0; 98418ec7d5cSSteven Whitehouse 985e1cb6be9SBob Peterson gfs2_replay_incr_blk(jd, &start); 986e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 98718ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 98818ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 98918ec7d5cSSteven Whitehouse 990a17d758bSBob Peterson jd->jd_found_blocks++; 99118ec7d5cSSteven Whitehouse 992a17d758bSBob Peterson if (gfs2_revoke_check(jd, blkno, start)) 99318ec7d5cSSteven Whitehouse continue; 99418ec7d5cSSteven Whitehouse 99518ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 99618ec7d5cSSteven Whitehouse if (error) 99718ec7d5cSSteven Whitehouse return error; 99818ec7d5cSSteven Whitehouse 99918ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 100018ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 100118ec7d5cSSteven Whitehouse 100218ec7d5cSSteven Whitehouse /* Unescape */ 100318ec7d5cSSteven Whitehouse if (esc) { 100418ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 100518ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 100618ec7d5cSSteven Whitehouse } 100718ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 100818ec7d5cSSteven Whitehouse 100918ec7d5cSSteven Whitehouse brelse(bh_log); 101018ec7d5cSSteven Whitehouse brelse(bh_ip); 101118ec7d5cSSteven Whitehouse 1012a17d758bSBob Peterson jd->jd_replayed_blocks++; 101318ec7d5cSSteven Whitehouse } 101418ec7d5cSSteven Whitehouse 101518ec7d5cSSteven Whitehouse return error; 101618ec7d5cSSteven Whitehouse } 101718ec7d5cSSteven Whitehouse 101818ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 101918ec7d5cSSteven Whitehouse 102018ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 102118ec7d5cSSteven Whitehouse { 1022feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 1023feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 102418ec7d5cSSteven Whitehouse 102518ec7d5cSSteven Whitehouse if (error) { 10267276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 102718ec7d5cSSteven Whitehouse return; 102818ec7d5cSSteven Whitehouse } 102918ec7d5cSSteven Whitehouse if (pass != 1) 103018ec7d5cSSteven Whitehouse return; 103118ec7d5cSSteven Whitehouse 103218ec7d5cSSteven Whitehouse /* data sync? */ 10337276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 103418ec7d5cSSteven Whitehouse 103518ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 1036a17d758bSBob Peterson jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 103718ec7d5cSSteven Whitehouse } 103818ec7d5cSSteven Whitehouse 103916ca9412SBenjamin Marzinski static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 104018ec7d5cSSteven Whitehouse { 1041d69a3c65SSteven Whitehouse struct list_head *head; 104218ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 104318ec7d5cSSteven Whitehouse 1044d69a3c65SSteven Whitehouse if (tr == NULL) 104516ca9412SBenjamin Marzinski return; 104616ca9412SBenjamin Marzinski 1047d69a3c65SSteven Whitehouse head = &tr->tr_databuf; 104818ec7d5cSSteven Whitehouse while (!list_empty(head)) { 1049c0752aa7SBob Peterson bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 1050c0752aa7SBob Peterson list_del_init(&bd->bd_list); 105116ca9412SBenjamin Marzinski gfs2_unpin(sdp, bd->bd_bh, tr); 105218ec7d5cSSteven Whitehouse } 105318ec7d5cSSteven Whitehouse } 105418ec7d5cSSteven Whitehouse 105518ec7d5cSSteven Whitehouse 105632ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_buf_lops = { 1057b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 1058b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 1059b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 1060b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 1061b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 1062ea67eedbSSteven Whitehouse .lo_name = "buf", 1063b3b94faaSDavid Teigland }; 1064b3b94faaSDavid Teigland 106532ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_revoke_lops = { 1066b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 1067f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 1068b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 1069b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 1070b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 1071ea67eedbSSteven Whitehouse .lo_name = "revoke", 1072b3b94faaSDavid Teigland }; 1073b3b94faaSDavid Teigland 107432ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_databuf_lops = { 1075b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 107618ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 107718ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 107818ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 1079ea67eedbSSteven Whitehouse .lo_name = "databuf", 1080b3b94faaSDavid Teigland }; 1081b3b94faaSDavid Teigland 1082b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 1083b3b94faaSDavid Teigland &gfs2_databuf_lops, 108416615be1SSteven Whitehouse &gfs2_buf_lops, 108516615be1SSteven Whitehouse &gfs2_revoke_lops, 1086ea67eedbSSteven Whitehouse NULL, 1087b3b94faaSDavid Teigland }; 1088b3b94faaSDavid Teigland 1089