17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b3b94faaSDavid Teigland /* 3b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 43a8a9a10SSteven Whitehouse * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5b3b94faaSDavid Teigland */ 6b3b94faaSDavid Teigland 7b3b94faaSDavid Teigland #include <linux/sched.h> 8b3b94faaSDavid Teigland #include <linux/slab.h> 9b3b94faaSDavid Teigland #include <linux/spinlock.h> 10b3b94faaSDavid Teigland #include <linux/completion.h> 11b3b94faaSDavid Teigland #include <linux/buffer_head.h> 1275ca61c1SSteven Whitehouse #include <linux/mempool.h> 135c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 14c969f58cSSteven Whitehouse #include <linux/bio.h> 15c969f58cSSteven Whitehouse #include <linux/fs.h> 167f63257dSBenjamin Marzinski #include <linux/list_sort.h> 17f4686c26SAbhi Das #include <linux/blkdev.h> 18b3b94faaSDavid Teigland 19f4686c26SAbhi Das #include "bmap.h" 20c1696fb8SBob Peterson #include "dir.h" 21b3b94faaSDavid Teigland #include "gfs2.h" 225c676f6dSSteven Whitehouse #include "incore.h" 232332c443SRobert Peterson #include "inode.h" 24b3b94faaSDavid Teigland #include "glock.h" 25b3b94faaSDavid Teigland #include "log.h" 26b3b94faaSDavid Teigland #include "lops.h" 27b3b94faaSDavid Teigland #include "meta_io.h" 28b3b94faaSDavid Teigland #include "recovery.h" 29b3b94faaSDavid Teigland #include "rgrp.h" 30b3b94faaSDavid Teigland #include "trans.h" 315c676f6dSSteven Whitehouse #include "util.h" 3263997775SSteven Whitehouse #include "trace_gfs2.h" 33b3b94faaSDavid Teigland 349b9107a5SSteven Whitehouse /** 359b9107a5SSteven Whitehouse * gfs2_pin - Pin a buffer in memory 369b9107a5SSteven Whitehouse * @sdp: The superblock 379b9107a5SSteven Whitehouse * @bh: The buffer to be pinned 389b9107a5SSteven Whitehouse * 399b9107a5SSteven Whitehouse * The log lock must be held when calling this function 409b9107a5SSteven Whitehouse */ 41767f433fSSteven Whitehouse void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) 429b9107a5SSteven Whitehouse { 439b9107a5SSteven Whitehouse struct gfs2_bufdata *bd; 449b9107a5SSteven Whitehouse 4529687a2aSSteven Whitehouse BUG_ON(!current->journal_info); 469b9107a5SSteven Whitehouse 479b9107a5SSteven Whitehouse clear_buffer_dirty(bh); 489b9107a5SSteven Whitehouse if (test_set_buffer_pinned(bh)) 499b9107a5SSteven Whitehouse gfs2_assert_withdraw(sdp, 0); 509b9107a5SSteven Whitehouse if (!buffer_uptodate(bh)) 519e1a9ecdSAndreas Gruenbacher gfs2_io_error_bh_wd(sdp, bh); 529b9107a5SSteven Whitehouse bd = bh->b_private; 539b9107a5SSteven Whitehouse /* If this buffer is in the AIL and it has already been written 549b9107a5SSteven Whitehouse * to in-place disk block, remove it from the AIL. 559b9107a5SSteven Whitehouse */ 56c618e87aSSteven Whitehouse spin_lock(&sdp->sd_ail_lock); 5716ca9412SBenjamin Marzinski if (bd->bd_tr) 5816ca9412SBenjamin Marzinski list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list); 59c618e87aSSteven Whitehouse spin_unlock(&sdp->sd_ail_lock); 609b9107a5SSteven Whitehouse get_bh(bh); 615e687eacSBenjamin Marzinski atomic_inc(&sdp->sd_log_pinned); 6263997775SSteven Whitehouse trace_gfs2_pin(bd, 1); 639b9107a5SSteven Whitehouse } 649b9107a5SSteven Whitehouse 657c9ca621SBob Peterson static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) 667c9ca621SBob Peterson { 677c9ca621SBob Peterson return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; 687c9ca621SBob Peterson } 697c9ca621SBob Peterson 707c9ca621SBob Peterson static void maybe_release_space(struct gfs2_bufdata *bd) 717c9ca621SBob Peterson { 727c9ca621SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 7315562c43SBob Peterson struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 746f6597baSAndreas Gruenbacher struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl); 757c9ca621SBob Peterson unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; 767c9ca621SBob Peterson struct gfs2_bitmap *bi = rgd->rd_bits + index; 777c9ca621SBob Peterson 785a7c6690SFabian Frederick if (bi->bi_clone == NULL) 797c9ca621SBob Peterson return; 807c9ca621SBob Peterson if (sdp->sd_args.ar_discard) 8166fc061bSSteven Whitehouse gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); 827c9ca621SBob Peterson memcpy(bi->bi_clone + bi->bi_offset, 83281b4952SAndreas Gruenbacher bd->bd_bh->b_data + bi->bi_offset, bi->bi_bytes); 847c9ca621SBob Peterson clear_bit(GBF_FULL, &bi->bi_flags); 857c9ca621SBob Peterson rgd->rd_free_clone = rgd->rd_free; 865ea5050cSBob Peterson rgd->rd_extfail_pt = rgd->rd_free; 877c9ca621SBob Peterson } 887c9ca621SBob Peterson 899b9107a5SSteven Whitehouse /** 909b9107a5SSteven Whitehouse * gfs2_unpin - Unpin a buffer 919b9107a5SSteven Whitehouse * @sdp: the filesystem the buffer belongs to 929b9107a5SSteven Whitehouse * @bh: The buffer to unpin 939b9107a5SSteven Whitehouse * @ai: 9429687a2aSSteven Whitehouse * @flags: The inode dirty flags 959b9107a5SSteven Whitehouse * 969b9107a5SSteven Whitehouse */ 979b9107a5SSteven Whitehouse 989b9107a5SSteven Whitehouse static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 9916ca9412SBenjamin Marzinski struct gfs2_trans *tr) 1009b9107a5SSteven Whitehouse { 1019b9107a5SSteven Whitehouse struct gfs2_bufdata *bd = bh->b_private; 1029b9107a5SSteven Whitehouse 10329687a2aSSteven Whitehouse BUG_ON(!buffer_uptodate(bh)); 10429687a2aSSteven Whitehouse BUG_ON(!buffer_pinned(bh)); 1059b9107a5SSteven Whitehouse 1069b9107a5SSteven Whitehouse lock_buffer(bh); 1079b9107a5SSteven Whitehouse mark_buffer_dirty(bh); 1089b9107a5SSteven Whitehouse clear_buffer_pinned(bh); 1099b9107a5SSteven Whitehouse 1107c9ca621SBob Peterson if (buffer_is_rgrp(bd)) 1117c9ca621SBob Peterson maybe_release_space(bd); 1127c9ca621SBob Peterson 113d6a079e8SDave Chinner spin_lock(&sdp->sd_ail_lock); 11416ca9412SBenjamin Marzinski if (bd->bd_tr) { 1159b9107a5SSteven Whitehouse list_del(&bd->bd_ail_st_list); 1169b9107a5SSteven Whitehouse brelse(bh); 1179b9107a5SSteven Whitehouse } else { 1189b9107a5SSteven Whitehouse struct gfs2_glock *gl = bd->bd_gl; 1199b9107a5SSteven Whitehouse list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); 1209b9107a5SSteven Whitehouse atomic_inc(&gl->gl_ail_count); 1219b9107a5SSteven Whitehouse } 12216ca9412SBenjamin Marzinski bd->bd_tr = tr; 12316ca9412SBenjamin Marzinski list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list); 124d6a079e8SDave Chinner spin_unlock(&sdp->sd_ail_lock); 125d6a079e8SDave Chinner 12629687a2aSSteven Whitehouse clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); 12763997775SSteven Whitehouse trace_gfs2_pin(bd, 0); 1289b9107a5SSteven Whitehouse unlock_buffer(bh); 1295e687eacSBenjamin Marzinski atomic_dec(&sdp->sd_log_pinned); 1309b9107a5SSteven Whitehouse } 1319b9107a5SSteven Whitehouse 132e8c92ed7SSteven Whitehouse static void gfs2_log_incr_head(struct gfs2_sbd *sdp) 13316615be1SSteven Whitehouse { 134e8c92ed7SSteven Whitehouse BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && 135e8c92ed7SSteven Whitehouse (sdp->sd_log_flush_head != sdp->sd_log_head)); 136e8c92ed7SSteven Whitehouse 137722f6f62SBob Peterson if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) 138e8c92ed7SSteven Whitehouse sdp->sd_log_flush_head = 0; 13916615be1SSteven Whitehouse } 14016615be1SSteven Whitehouse 141c1696fb8SBob Peterson u64 gfs2_log_bmap(struct gfs2_sbd *sdp) 14216615be1SSteven Whitehouse { 143e8c92ed7SSteven Whitehouse unsigned int lbn = sdp->sd_log_flush_head; 144e8c92ed7SSteven Whitehouse struct gfs2_journal_extent *je; 145e8c92ed7SSteven Whitehouse u64 block; 14616615be1SSteven Whitehouse 147b50f227bSSteven Whitehouse list_for_each_entry(je, &sdp->sd_jdesc->extent_list, list) { 148b50f227bSSteven Whitehouse if ((lbn >= je->lblock) && (lbn < (je->lblock + je->blocks))) { 149e8c92ed7SSteven Whitehouse block = je->dblock + lbn - je->lblock; 15047ac5537SSteven Whitehouse gfs2_log_incr_head(sdp); 151e8c92ed7SSteven Whitehouse return block; 152e8c92ed7SSteven Whitehouse } 153e8c92ed7SSteven Whitehouse } 15447ac5537SSteven Whitehouse 155e8c92ed7SSteven Whitehouse return -1; 15647ac5537SSteven Whitehouse } 15747ac5537SSteven Whitehouse 15847ac5537SSteven Whitehouse /** 159e8c92ed7SSteven Whitehouse * gfs2_end_log_write_bh - end log write of pagecache data with buffers 160e8c92ed7SSteven Whitehouse * @sdp: The superblock 161e8c92ed7SSteven Whitehouse * @bvec: The bio_vec 162e8c92ed7SSteven Whitehouse * @error: The i/o status 163e8c92ed7SSteven Whitehouse * 1644519eaadSBob Peterson * This finds the relevant buffers and unlocks them and sets the 165e8c92ed7SSteven Whitehouse * error flag according to the status of the i/o request. This is 166e8c92ed7SSteven Whitehouse * used when the log is writing data which has an in-place version 167e8c92ed7SSteven Whitehouse * that is pinned in the pagecache. 168e8c92ed7SSteven Whitehouse */ 169e8c92ed7SSteven Whitehouse 1706dc4f100SMing Lei static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, 1716dc4f100SMing Lei struct bio_vec *bvec, 1724e4cbee9SChristoph Hellwig blk_status_t error) 173e8c92ed7SSteven Whitehouse { 174e8c92ed7SSteven Whitehouse struct buffer_head *bh, *next; 175e8c92ed7SSteven Whitehouse struct page *page = bvec->bv_page; 176e8c92ed7SSteven Whitehouse unsigned size; 177e8c92ed7SSteven Whitehouse 178e8c92ed7SSteven Whitehouse bh = page_buffers(page); 179e8c92ed7SSteven Whitehouse size = bvec->bv_len; 180e8c92ed7SSteven Whitehouse while (bh_offset(bh) < bvec->bv_offset) 181e8c92ed7SSteven Whitehouse bh = bh->b_this_page; 182e8c92ed7SSteven Whitehouse do { 183e8c92ed7SSteven Whitehouse if (error) 18487354e5dSJeff Layton mark_buffer_write_io_error(bh); 185e8c92ed7SSteven Whitehouse unlock_buffer(bh); 186e8c92ed7SSteven Whitehouse next = bh->b_this_page; 187e8c92ed7SSteven Whitehouse size -= bh->b_size; 188e8c92ed7SSteven Whitehouse brelse(bh); 189e8c92ed7SSteven Whitehouse bh = next; 190e8c92ed7SSteven Whitehouse } while(bh && size); 191e8c92ed7SSteven Whitehouse } 192e8c92ed7SSteven Whitehouse 193e8c92ed7SSteven Whitehouse /** 194e8c92ed7SSteven Whitehouse * gfs2_end_log_write - end of i/o to the log 195e8c92ed7SSteven Whitehouse * @bio: The bio 196e8c92ed7SSteven Whitehouse * 197e8c92ed7SSteven Whitehouse * Each bio_vec contains either data from the pagecache or data 198e8c92ed7SSteven Whitehouse * relating to the log itself. Here we iterate over the bio_vec 199e8c92ed7SSteven Whitehouse * array, processing both kinds of data. 20047ac5537SSteven Whitehouse * 20147ac5537SSteven Whitehouse */ 20247ac5537SSteven Whitehouse 2034246a0b6SChristoph Hellwig static void gfs2_end_log_write(struct bio *bio) 20447ac5537SSteven Whitehouse { 205e8c92ed7SSteven Whitehouse struct gfs2_sbd *sdp = bio->bi_private; 206e8c92ed7SSteven Whitehouse struct bio_vec *bvec; 207e8c92ed7SSteven Whitehouse struct page *page; 2086dc4f100SMing Lei struct bvec_iter_all iter_all; 20947ac5537SSteven Whitehouse 210942b0cddSBob Peterson if (bio->bi_status) { 211942b0cddSBob Peterson fs_err(sdp, "Error %d writing to journal, jid=%u\n", 212942b0cddSBob Peterson bio->bi_status, sdp->sd_jdesc->jd_jid); 213942b0cddSBob Peterson wake_up(&sdp->sd_logd_waitq); 214942b0cddSBob Peterson } 215e8c92ed7SSteven Whitehouse 2162b070cfeSChristoph Hellwig bio_for_each_segment_all(bvec, bio, iter_all) { 217e8c92ed7SSteven Whitehouse page = bvec->bv_page; 218e8c92ed7SSteven Whitehouse if (page_has_buffers(page)) 2194e4cbee9SChristoph Hellwig gfs2_end_log_write_bh(sdp, bvec, bio->bi_status); 220e8c92ed7SSteven Whitehouse else 221e8c92ed7SSteven Whitehouse mempool_free(page, gfs2_page_pool); 222e8c92ed7SSteven Whitehouse } 223e8c92ed7SSteven Whitehouse 224e8c92ed7SSteven Whitehouse bio_put(bio); 22547ac5537SSteven Whitehouse if (atomic_dec_and_test(&sdp->sd_log_in_flight)) 22647ac5537SSteven Whitehouse wake_up(&sdp->sd_log_flush_wait); 22747ac5537SSteven Whitehouse } 22847ac5537SSteven Whitehouse 22947ac5537SSteven Whitehouse /** 2305b846095SAbhi Das * gfs2_log_submit_bio - Submit any pending log bio 2315b846095SAbhi Das * @biop: Address of the bio pointer 232f4686c26SAbhi Das * @opf: REQ_OP | op_flags 233e8c92ed7SSteven Whitehouse * 234e8c92ed7SSteven Whitehouse * Submit any pending part-built or full bio to the block device. If 235e8c92ed7SSteven Whitehouse * there is no pending bio, then this is a no-op. 236e8c92ed7SSteven Whitehouse */ 237e8c92ed7SSteven Whitehouse 238f4686c26SAbhi Das void gfs2_log_submit_bio(struct bio **biop, int opf) 239e8c92ed7SSteven Whitehouse { 2405b846095SAbhi Das struct bio *bio = *biop; 2415b846095SAbhi Das if (bio) { 2425b846095SAbhi Das struct gfs2_sbd *sdp = bio->bi_private; 243e8c92ed7SSteven Whitehouse atomic_inc(&sdp->sd_log_in_flight); 244f4686c26SAbhi Das bio->bi_opf = opf; 2455b846095SAbhi Das submit_bio(bio); 2465b846095SAbhi Das *biop = NULL; 247e8c92ed7SSteven Whitehouse } 248e8c92ed7SSteven Whitehouse } 249e8c92ed7SSteven Whitehouse 250e8c92ed7SSteven Whitehouse /** 2515b846095SAbhi Das * gfs2_log_alloc_bio - Allocate a bio 252e8c92ed7SSteven Whitehouse * @sdp: The super block 2535b846095SAbhi Das * @blkno: The device block number we want to write to 2545b846095SAbhi Das * @end_io: The bi_end_io callback 255e8c92ed7SSteven Whitehouse * 2565b846095SAbhi Das * Allocate a new bio, initialize it with the given parameters and return it. 257e8c92ed7SSteven Whitehouse * 2585b846095SAbhi Das * Returns: The newly allocated bio 259e8c92ed7SSteven Whitehouse */ 260e8c92ed7SSteven Whitehouse 2615b846095SAbhi Das static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno, 2625b846095SAbhi Das bio_end_io_t *end_io) 263e8c92ed7SSteven Whitehouse { 264e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2655b846095SAbhi Das struct bio *bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES); 266e8c92ed7SSteven Whitehouse 2674f024f37SKent Overstreet bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9); 26874d46992SChristoph Hellwig bio_set_dev(bio, sb->s_bdev); 2695b846095SAbhi Das bio->bi_end_io = end_io; 270e8c92ed7SSteven Whitehouse bio->bi_private = sdp; 271e8c92ed7SSteven Whitehouse 272e8c92ed7SSteven Whitehouse return bio; 273e8c92ed7SSteven Whitehouse } 274e8c92ed7SSteven Whitehouse 275e8c92ed7SSteven Whitehouse /** 276e8c92ed7SSteven Whitehouse * gfs2_log_get_bio - Get cached log bio, or allocate a new one 277e8c92ed7SSteven Whitehouse * @sdp: The super block 278e8c92ed7SSteven Whitehouse * @blkno: The device block number we want to write to 2795b846095SAbhi Das * @bio: The bio to get or allocate 2805b846095SAbhi Das * @op: REQ_OP 2815b846095SAbhi Das * @end_io: The bi_end_io callback 2825b846095SAbhi Das * @flush: Always flush the current bio and allocate a new one? 283e8c92ed7SSteven Whitehouse * 284e8c92ed7SSteven Whitehouse * If there is a cached bio, then if the next block number is sequential 285e8c92ed7SSteven Whitehouse * with the previous one, return it, otherwise flush the bio to the 2865b846095SAbhi Das * device. If there is no cached bio, or we just flushed it, then 287e8c92ed7SSteven Whitehouse * allocate a new one. 288e8c92ed7SSteven Whitehouse * 289e8c92ed7SSteven Whitehouse * Returns: The bio to use for log writes 290e8c92ed7SSteven Whitehouse */ 291e8c92ed7SSteven Whitehouse 2925b846095SAbhi Das static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno, 2935b846095SAbhi Das struct bio **biop, int op, 2945b846095SAbhi Das bio_end_io_t *end_io, bool flush) 295e8c92ed7SSteven Whitehouse { 2965b846095SAbhi Das struct bio *bio = *biop; 297e8c92ed7SSteven Whitehouse 298e8c92ed7SSteven Whitehouse if (bio) { 2995b846095SAbhi Das u64 nblk; 3005b846095SAbhi Das 301f73a1c7dSKent Overstreet nblk = bio_end_sector(bio); 302e8c92ed7SSteven Whitehouse nblk >>= sdp->sd_fsb2bb_shift; 3035b846095SAbhi Das if (blkno == nblk && !flush) 304e8c92ed7SSteven Whitehouse return bio; 305f4686c26SAbhi Das gfs2_log_submit_bio(biop, op); 306e8c92ed7SSteven Whitehouse } 307e8c92ed7SSteven Whitehouse 3085b846095SAbhi Das *biop = gfs2_log_alloc_bio(sdp, blkno, end_io); 3095b846095SAbhi Das return *biop; 310e8c92ed7SSteven Whitehouse } 311e8c92ed7SSteven Whitehouse 312e8c92ed7SSteven Whitehouse /** 313e8c92ed7SSteven Whitehouse * gfs2_log_write - write to log 31447ac5537SSteven Whitehouse * @sdp: the filesystem 315e8c92ed7SSteven Whitehouse * @page: the page to write 316e8c92ed7SSteven Whitehouse * @size: the size of the data to write 317e8c92ed7SSteven Whitehouse * @offset: the offset within the page 318c1696fb8SBob Peterson * @blkno: block number of the log entry 31947ac5537SSteven Whitehouse * 320e8c92ed7SSteven Whitehouse * Try and add the page segment to the current bio. If that fails, 321e8c92ed7SSteven Whitehouse * submit the current bio to the device and create a new one, and 322e8c92ed7SSteven Whitehouse * then add the page segment to that. 32347ac5537SSteven Whitehouse */ 32447ac5537SSteven Whitehouse 325c1696fb8SBob Peterson void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, 326c1696fb8SBob Peterson unsigned size, unsigned offset, u64 blkno) 32747ac5537SSteven Whitehouse { 328e8c92ed7SSteven Whitehouse struct bio *bio; 329e8c92ed7SSteven Whitehouse int ret; 33047ac5537SSteven Whitehouse 3315b846095SAbhi Das bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio, REQ_OP_WRITE, 3325b846095SAbhi Das gfs2_end_log_write, false); 333e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 334e8c92ed7SSteven Whitehouse if (ret == 0) { 3355b846095SAbhi Das bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio, 3365b846095SAbhi Das REQ_OP_WRITE, gfs2_end_log_write, true); 337e8c92ed7SSteven Whitehouse ret = bio_add_page(bio, page, size, offset); 338e8c92ed7SSteven Whitehouse WARN_ON(ret == 0); 339e8c92ed7SSteven Whitehouse } 34047ac5537SSteven Whitehouse } 34116615be1SSteven Whitehouse 342e8c92ed7SSteven Whitehouse /** 343e8c92ed7SSteven Whitehouse * gfs2_log_write_bh - write a buffer's content to the log 344e8c92ed7SSteven Whitehouse * @sdp: The super block 345e8c92ed7SSteven Whitehouse * @bh: The buffer pointing to the in-place location 346e8c92ed7SSteven Whitehouse * 347e8c92ed7SSteven Whitehouse * This writes the content of the buffer to the next available location 348e8c92ed7SSteven Whitehouse * in the log. The buffer will be unlocked once the i/o to the log has 349e8c92ed7SSteven Whitehouse * completed. 350e8c92ed7SSteven Whitehouse */ 351e8c92ed7SSteven Whitehouse 352e8c92ed7SSteven Whitehouse static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) 35316615be1SSteven Whitehouse { 354c1696fb8SBob Peterson gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh), 355c1696fb8SBob Peterson gfs2_log_bmap(sdp)); 356e8c92ed7SSteven Whitehouse } 357e8c92ed7SSteven Whitehouse 358e8c92ed7SSteven Whitehouse /** 359e8c92ed7SSteven Whitehouse * gfs2_log_write_page - write one block stored in a page, into the log 360e8c92ed7SSteven Whitehouse * @sdp: The superblock 361e8c92ed7SSteven Whitehouse * @page: The struct page 362e8c92ed7SSteven Whitehouse * 363e8c92ed7SSteven Whitehouse * This writes the first block-sized part of the page into the log. Note 364e8c92ed7SSteven Whitehouse * that the page must have been allocated from the gfs2_page_pool mempool 365e8c92ed7SSteven Whitehouse * and that after this has been called, ownership has been transferred and 366e8c92ed7SSteven Whitehouse * the page may be freed at any time. 367e8c92ed7SSteven Whitehouse */ 368e8c92ed7SSteven Whitehouse 369e8c92ed7SSteven Whitehouse void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) 370e8c92ed7SSteven Whitehouse { 371e8c92ed7SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 372c1696fb8SBob Peterson gfs2_log_write(sdp, page, sb->s_blocksize, 0, 373c1696fb8SBob Peterson gfs2_log_bmap(sdp)); 374e8c92ed7SSteven Whitehouse } 375e8c92ed7SSteven Whitehouse 376f4686c26SAbhi Das /** 377f4686c26SAbhi Das * gfs2_end_log_read - end I/O callback for reads from the log 378f4686c26SAbhi Das * @bio: The bio 379f4686c26SAbhi Das * 380f4686c26SAbhi Das * Simply unlock the pages in the bio. The main thread will wait on them and 381f4686c26SAbhi Das * process them in order as necessary. 382f4686c26SAbhi Das */ 383f4686c26SAbhi Das 384f4686c26SAbhi Das static void gfs2_end_log_read(struct bio *bio) 385f4686c26SAbhi Das { 386f4686c26SAbhi Das struct page *page; 387f4686c26SAbhi Das struct bio_vec *bvec; 388f4686c26SAbhi Das struct bvec_iter_all iter_all; 389f4686c26SAbhi Das 390ef75bd71SLinus Torvalds bio_for_each_segment_all(bvec, bio, iter_all) { 391f4686c26SAbhi Das page = bvec->bv_page; 392f4686c26SAbhi Das if (bio->bi_status) { 393f4686c26SAbhi Das int err = blk_status_to_errno(bio->bi_status); 394f4686c26SAbhi Das 395f4686c26SAbhi Das SetPageError(page); 396f4686c26SAbhi Das mapping_set_error(page->mapping, err); 397f4686c26SAbhi Das } 398f4686c26SAbhi Das unlock_page(page); 399f4686c26SAbhi Das } 400f4686c26SAbhi Das 401f4686c26SAbhi Das bio_put(bio); 402f4686c26SAbhi Das } 403f4686c26SAbhi Das 404f4686c26SAbhi Das /** 405f4686c26SAbhi Das * gfs2_jhead_pg_srch - Look for the journal head in a given page. 406f4686c26SAbhi Das * @jd: The journal descriptor 407f4686c26SAbhi Das * @page: The page to look in 408f4686c26SAbhi Das * 409f4686c26SAbhi Das * Returns: 1 if found, 0 otherwise. 410f4686c26SAbhi Das */ 411f4686c26SAbhi Das 412f4686c26SAbhi Das static bool gfs2_jhead_pg_srch(struct gfs2_jdesc *jd, 413f4686c26SAbhi Das struct gfs2_log_header_host *head, 414f4686c26SAbhi Das struct page *page) 415f4686c26SAbhi Das { 416f4686c26SAbhi Das struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 417f4686c26SAbhi Das struct gfs2_log_header_host uninitialized_var(lh); 418f4686c26SAbhi Das void *kaddr = kmap_atomic(page); 419f4686c26SAbhi Das unsigned int offset; 420f4686c26SAbhi Das bool ret = false; 421f4686c26SAbhi Das 422f4686c26SAbhi Das for (offset = 0; offset < PAGE_SIZE; offset += sdp->sd_sb.sb_bsize) { 423f4686c26SAbhi Das if (!__get_log_header(sdp, kaddr + offset, 0, &lh)) { 424f4686c26SAbhi Das if (lh.lh_sequence > head->lh_sequence) 425f4686c26SAbhi Das *head = lh; 426f4686c26SAbhi Das else { 427f4686c26SAbhi Das ret = true; 428f4686c26SAbhi Das break; 429f4686c26SAbhi Das } 430f4686c26SAbhi Das } 431f4686c26SAbhi Das } 432f4686c26SAbhi Das kunmap_atomic(kaddr); 433f4686c26SAbhi Das return ret; 434f4686c26SAbhi Das } 435f4686c26SAbhi Das 436f4686c26SAbhi Das /** 437f4686c26SAbhi Das * gfs2_jhead_process_page - Search/cleanup a page 438f4686c26SAbhi Das * @jd: The journal descriptor 439f4686c26SAbhi Das * @index: Index of the page to look into 440f4686c26SAbhi Das * @done: If set, perform only cleanup, else search and set if found. 441f4686c26SAbhi Das * 442f4686c26SAbhi Das * Find the page with 'index' in the journal's mapping. Search the page for 443f4686c26SAbhi Das * the journal head if requested (cleanup == false). Release refs on the 444f4686c26SAbhi Das * page so the page cache can reclaim it (put_page() twice). We grabbed a 445f4686c26SAbhi Das * reference on this page two times, first when we did a find_or_create_page() 446f4686c26SAbhi Das * to obtain the page to add it to the bio and second when we do a 447f4686c26SAbhi Das * find_get_page() here to get the page to wait on while I/O on it is being 448f4686c26SAbhi Das * completed. 449f4686c26SAbhi Das * This function is also used to free up a page we might've grabbed but not 450f4686c26SAbhi Das * used. Maybe we added it to a bio, but not submitted it for I/O. Or we 451f4686c26SAbhi Das * submitted the I/O, but we already found the jhead so we only need to drop 452f4686c26SAbhi Das * our references to the page. 453f4686c26SAbhi Das */ 454f4686c26SAbhi Das 455f4686c26SAbhi Das static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index, 456f4686c26SAbhi Das struct gfs2_log_header_host *head, 457f4686c26SAbhi Das bool *done) 458f4686c26SAbhi Das { 459f4686c26SAbhi Das struct page *page; 460f4686c26SAbhi Das 461f4686c26SAbhi Das page = find_get_page(jd->jd_inode->i_mapping, index); 462f4686c26SAbhi Das wait_on_page_locked(page); 463f4686c26SAbhi Das 464f4686c26SAbhi Das if (PageError(page)) 465f4686c26SAbhi Das *done = true; 466f4686c26SAbhi Das 467f4686c26SAbhi Das if (!*done) 468f4686c26SAbhi Das *done = gfs2_jhead_pg_srch(jd, head, page); 469f4686c26SAbhi Das 470f4686c26SAbhi Das put_page(page); /* Once for find_get_page */ 471f4686c26SAbhi Das put_page(page); /* Once more for find_or_create_page */ 472f4686c26SAbhi Das } 473f4686c26SAbhi Das 474f4686c26SAbhi Das /** 475f4686c26SAbhi Das * gfs2_find_jhead - find the head of a log 476f4686c26SAbhi Das * @jd: The journal descriptor 477f4686c26SAbhi Das * @head: The log descriptor for the head of the log is returned here 478f4686c26SAbhi Das * 479f4686c26SAbhi Das * Do a search of a journal by reading it in large chunks using bios and find 480f4686c26SAbhi Das * the valid log entry with the highest sequence number. (i.e. the log head) 481f4686c26SAbhi Das * 482f4686c26SAbhi Das * Returns: 0 on success, errno otherwise 483f4686c26SAbhi Das */ 484f4686c26SAbhi Das int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head, 485f4686c26SAbhi Das bool keep_cache) 486f4686c26SAbhi Das { 487f4686c26SAbhi Das struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 488f4686c26SAbhi Das struct address_space *mapping = jd->jd_inode->i_mapping; 489f4686c26SAbhi Das unsigned int block = 0, blocks_submitted = 0, blocks_read = 0; 490f4686c26SAbhi Das unsigned int bsize = sdp->sd_sb.sb_bsize; 491f4686c26SAbhi Das unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift; 492f4686c26SAbhi Das unsigned int shift = PAGE_SHIFT - bsize_shift; 493f4686c26SAbhi Das unsigned int readhead_blocks = BIO_MAX_PAGES << shift; 494f4686c26SAbhi Das struct gfs2_journal_extent *je; 495f4686c26SAbhi Das int sz, ret = 0; 496f4686c26SAbhi Das struct bio *bio = NULL; 497f4686c26SAbhi Das struct page *page = NULL; 498f4686c26SAbhi Das bool done = false; 499f4686c26SAbhi Das errseq_t since; 500f4686c26SAbhi Das 501f4686c26SAbhi Das memset(head, 0, sizeof(*head)); 502f4686c26SAbhi Das if (list_empty(&jd->extent_list)) 503f4686c26SAbhi Das gfs2_map_journal_extents(sdp, jd); 504f4686c26SAbhi Das 505f4686c26SAbhi Das since = filemap_sample_wb_err(mapping); 506f4686c26SAbhi Das list_for_each_entry(je, &jd->extent_list, list) { 507f4686c26SAbhi Das for (; block < je->lblock + je->blocks; block++) { 508f4686c26SAbhi Das u64 dblock; 509f4686c26SAbhi Das 510f4686c26SAbhi Das if (!page) { 511f4686c26SAbhi Das page = find_or_create_page(mapping, 512f4686c26SAbhi Das block >> shift, GFP_NOFS); 513f4686c26SAbhi Das if (!page) { 514f4686c26SAbhi Das ret = -ENOMEM; 515f4686c26SAbhi Das done = true; 516f4686c26SAbhi Das goto out; 517f4686c26SAbhi Das } 518f4686c26SAbhi Das } 519f4686c26SAbhi Das 520f4686c26SAbhi Das if (bio) { 521f4686c26SAbhi Das unsigned int off; 522f4686c26SAbhi Das 523f4686c26SAbhi Das off = (block << bsize_shift) & ~PAGE_MASK; 524f4686c26SAbhi Das sz = bio_add_page(bio, page, bsize, off); 525f4686c26SAbhi Das if (sz == bsize) { /* block added */ 526f4686c26SAbhi Das if (off + bsize == PAGE_SIZE) { 527f4686c26SAbhi Das page = NULL; 528f4686c26SAbhi Das goto page_added; 529f4686c26SAbhi Das } 530f4686c26SAbhi Das continue; 531f4686c26SAbhi Das } 532f4686c26SAbhi Das blocks_submitted = block + 1; 533f4686c26SAbhi Das submit_bio(bio); 534f4686c26SAbhi Das bio = NULL; 535f4686c26SAbhi Das } 536f4686c26SAbhi Das 537f4686c26SAbhi Das dblock = je->dblock + (block - je->lblock); 538f4686c26SAbhi Das bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read); 539f4686c26SAbhi Das bio->bi_opf = REQ_OP_READ; 540f4686c26SAbhi Das sz = bio_add_page(bio, page, bsize, 0); 541f4686c26SAbhi Das gfs2_assert_warn(sdp, sz == bsize); 542f4686c26SAbhi Das if (bsize == PAGE_SIZE) 543f4686c26SAbhi Das page = NULL; 544f4686c26SAbhi Das 545f4686c26SAbhi Das page_added: 546f4686c26SAbhi Das if (blocks_submitted < blocks_read + readhead_blocks) { 547f4686c26SAbhi Das /* Keep at least one bio in flight */ 548f4686c26SAbhi Das continue; 549f4686c26SAbhi Das } 550f4686c26SAbhi Das 551f4686c26SAbhi Das gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done); 552f4686c26SAbhi Das blocks_read += PAGE_SIZE >> bsize_shift; 553f4686c26SAbhi Das if (done) 554f4686c26SAbhi Das goto out; /* found */ 555f4686c26SAbhi Das } 556f4686c26SAbhi Das } 557f4686c26SAbhi Das 558f4686c26SAbhi Das out: 559f4686c26SAbhi Das if (bio) 560f4686c26SAbhi Das submit_bio(bio); 561f4686c26SAbhi Das while (blocks_read < block) { 562f4686c26SAbhi Das gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done); 563f4686c26SAbhi Das blocks_read += PAGE_SIZE >> bsize_shift; 564f4686c26SAbhi Das } 565f4686c26SAbhi Das 566f4686c26SAbhi Das if (!ret) 567f4686c26SAbhi Das ret = filemap_check_wb_err(mapping, since); 568f4686c26SAbhi Das 569f4686c26SAbhi Das if (!keep_cache) 570f4686c26SAbhi Das truncate_inode_pages(mapping, 0); 571f4686c26SAbhi Das 572f4686c26SAbhi Das return ret; 573f4686c26SAbhi Das } 574f4686c26SAbhi Das 575dad30e90SSteven Whitehouse static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, 576dad30e90SSteven Whitehouse u32 ld_length, u32 ld_data1) 577e8c92ed7SSteven Whitehouse { 578144a4c2fSSteven Whitehouse struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 579e8c92ed7SSteven Whitehouse struct gfs2_log_descriptor *ld = page_address(page); 580e8c92ed7SSteven Whitehouse clear_page(ld); 58116615be1SSteven Whitehouse ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 58216615be1SSteven Whitehouse ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); 58316615be1SSteven Whitehouse ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); 58416615be1SSteven Whitehouse ld->ld_type = cpu_to_be32(ld_type); 585dad30e90SSteven Whitehouse ld->ld_length = cpu_to_be32(ld_length); 586dad30e90SSteven Whitehouse ld->ld_data1 = cpu_to_be32(ld_data1); 58716615be1SSteven Whitehouse ld->ld_data2 = 0; 588e8c92ed7SSteven Whitehouse return page; 58916615be1SSteven Whitehouse } 59016615be1SSteven Whitehouse 591dad30e90SSteven Whitehouse static void gfs2_check_magic(struct buffer_head *bh) 592dad30e90SSteven Whitehouse { 593dad30e90SSteven Whitehouse void *kaddr; 594dad30e90SSteven Whitehouse __be32 *ptr; 595dad30e90SSteven Whitehouse 596dad30e90SSteven Whitehouse clear_buffer_escaped(bh); 597dad30e90SSteven Whitehouse kaddr = kmap_atomic(bh->b_page); 598dad30e90SSteven Whitehouse ptr = kaddr + bh_offset(bh); 599dad30e90SSteven Whitehouse if (*ptr == cpu_to_be32(GFS2_MAGIC)) 600dad30e90SSteven Whitehouse set_buffer_escaped(bh); 601dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 602dad30e90SSteven Whitehouse } 603dad30e90SSteven Whitehouse 6047f63257dSBenjamin Marzinski static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) 6057f63257dSBenjamin Marzinski { 6067f63257dSBenjamin Marzinski struct gfs2_bufdata *bda, *bdb; 6077f63257dSBenjamin Marzinski 6087f63257dSBenjamin Marzinski bda = list_entry(a, struct gfs2_bufdata, bd_list); 6097f63257dSBenjamin Marzinski bdb = list_entry(b, struct gfs2_bufdata, bd_list); 6107f63257dSBenjamin Marzinski 6117f63257dSBenjamin Marzinski if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr) 6127f63257dSBenjamin Marzinski return -1; 6137f63257dSBenjamin Marzinski if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr) 6147f63257dSBenjamin Marzinski return 1; 6157f63257dSBenjamin Marzinski return 0; 6167f63257dSBenjamin Marzinski } 6177f63257dSBenjamin Marzinski 618dad30e90SSteven Whitehouse static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, 619dad30e90SSteven Whitehouse unsigned int total, struct list_head *blist, 620dad30e90SSteven Whitehouse bool is_databuf) 621b3b94faaSDavid Teigland { 622b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld; 623b3b94faaSDavid Teigland struct gfs2_bufdata *bd1 = NULL, *bd2; 624e8c92ed7SSteven Whitehouse struct page *page; 625b3b94faaSDavid Teigland unsigned int num; 626b3b94faaSDavid Teigland unsigned n; 627b3b94faaSDavid Teigland __be64 *ptr; 628b3b94faaSDavid Teigland 629905d2aefSBob Peterson gfs2_log_lock(sdp); 6307f63257dSBenjamin Marzinski list_sort(NULL, blist, blocknr_cmp); 631c0752aa7SBob Peterson bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list); 632b3b94faaSDavid Teigland while(total) { 633b3b94faaSDavid Teigland num = total; 634b3b94faaSDavid Teigland if (total > limit) 635b3b94faaSDavid Teigland num = limit; 636905d2aefSBob Peterson gfs2_log_unlock(sdp); 6374a586812SBob Peterson page = gfs2_get_log_desc(sdp, 6384a586812SBob Peterson is_databuf ? GFS2_LOG_DESC_JDATA : 6394a586812SBob Peterson GFS2_LOG_DESC_METADATA, num + 1, num); 640e8c92ed7SSteven Whitehouse ld = page_address(page); 641905d2aefSBob Peterson gfs2_log_lock(sdp); 642e8c92ed7SSteven Whitehouse ptr = (__be64 *)(ld + 1); 643b3b94faaSDavid Teigland 644b3b94faaSDavid Teigland n = 0; 645c0752aa7SBob Peterson list_for_each_entry_continue(bd1, blist, bd_list) { 646b3b94faaSDavid Teigland *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); 647dad30e90SSteven Whitehouse if (is_databuf) { 648dad30e90SSteven Whitehouse gfs2_check_magic(bd1->bd_bh); 649dad30e90SSteven Whitehouse *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); 650dad30e90SSteven Whitehouse } 651b3b94faaSDavid Teigland if (++n >= num) 652b3b94faaSDavid Teigland break; 653b3b94faaSDavid Teigland } 654b3b94faaSDavid Teigland 655905d2aefSBob Peterson gfs2_log_unlock(sdp); 656e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 657905d2aefSBob Peterson gfs2_log_lock(sdp); 658b3b94faaSDavid Teigland 659b3b94faaSDavid Teigland n = 0; 660c0752aa7SBob Peterson list_for_each_entry_continue(bd2, blist, bd_list) { 66116615be1SSteven Whitehouse get_bh(bd2->bd_bh); 662905d2aefSBob Peterson gfs2_log_unlock(sdp); 66316615be1SSteven Whitehouse lock_buffer(bd2->bd_bh); 664dad30e90SSteven Whitehouse 665dad30e90SSteven Whitehouse if (buffer_escaped(bd2->bd_bh)) { 666dad30e90SSteven Whitehouse void *kaddr; 667dad30e90SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 668dad30e90SSteven Whitehouse ptr = page_address(page); 669dad30e90SSteven Whitehouse kaddr = kmap_atomic(bd2->bd_bh->b_page); 670dad30e90SSteven Whitehouse memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), 671dad30e90SSteven Whitehouse bd2->bd_bh->b_size); 672dad30e90SSteven Whitehouse kunmap_atomic(kaddr); 673dad30e90SSteven Whitehouse *(__be32 *)ptr = 0; 674dad30e90SSteven Whitehouse clear_buffer_escaped(bd2->bd_bh); 675dad30e90SSteven Whitehouse unlock_buffer(bd2->bd_bh); 676dad30e90SSteven Whitehouse brelse(bd2->bd_bh); 677dad30e90SSteven Whitehouse gfs2_log_write_page(sdp, page); 678dad30e90SSteven Whitehouse } else { 679e8c92ed7SSteven Whitehouse gfs2_log_write_bh(sdp, bd2->bd_bh); 680dad30e90SSteven Whitehouse } 681905d2aefSBob Peterson gfs2_log_lock(sdp); 682b3b94faaSDavid Teigland if (++n >= num) 683b3b94faaSDavid Teigland break; 684b3b94faaSDavid Teigland } 685b3b94faaSDavid Teigland 686905d2aefSBob Peterson BUG_ON(total < num); 687b3b94faaSDavid Teigland total -= num; 688b3b94faaSDavid Teigland } 689905d2aefSBob Peterson gfs2_log_unlock(sdp); 690b3b94faaSDavid Teigland } 691b3b94faaSDavid Teigland 692d69a3c65SSteven Whitehouse static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 693dad30e90SSteven Whitehouse { 694dad30e90SSteven Whitehouse unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ 695022ef4feSSteven Whitehouse unsigned int nbuf; 696d69a3c65SSteven Whitehouse if (tr == NULL) 697d69a3c65SSteven Whitehouse return; 698022ef4feSSteven Whitehouse nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm; 699022ef4feSSteven Whitehouse gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0); 700dad30e90SSteven Whitehouse } 701dad30e90SSteven Whitehouse 70216ca9412SBenjamin Marzinski static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 703b3b94faaSDavid Teigland { 704d69a3c65SSteven Whitehouse struct list_head *head; 705b3b94faaSDavid Teigland struct gfs2_bufdata *bd; 706b3b94faaSDavid Teigland 707d69a3c65SSteven Whitehouse if (tr == NULL) 70816ca9412SBenjamin Marzinski return; 70916ca9412SBenjamin Marzinski 710d69a3c65SSteven Whitehouse head = &tr->tr_buf; 711b3b94faaSDavid Teigland while (!list_empty(head)) { 712c0752aa7SBob Peterson bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 713c0752aa7SBob Peterson list_del_init(&bd->bd_list); 71416ca9412SBenjamin Marzinski gfs2_unpin(sdp, bd->bd_bh, tr); 715b3b94faaSDavid Teigland } 716b3b94faaSDavid Teigland } 717b3b94faaSDavid Teigland 718b3b94faaSDavid Teigland static void buf_lo_before_scan(struct gfs2_jdesc *jd, 71955167622SAl Viro struct gfs2_log_header_host *head, int pass) 720b3b94faaSDavid Teigland { 721b3b94faaSDavid Teigland if (pass != 0) 722b3b94faaSDavid Teigland return; 723b3b94faaSDavid Teigland 724a17d758bSBob Peterson jd->jd_found_blocks = 0; 725a17d758bSBob Peterson jd->jd_replayed_blocks = 0; 726b3b94faaSDavid Teigland } 727b3b94faaSDavid Teigland 7287c70b896SBob Peterson static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 729b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 730b3b94faaSDavid Teigland int pass) 731b3b94faaSDavid Teigland { 732feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 733feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 7345c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 735b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_data1); 736b3b94faaSDavid Teigland struct buffer_head *bh_log, *bh_ip; 737cd915493SSteven Whitehouse u64 blkno; 738b3b94faaSDavid Teigland int error = 0; 739b3b94faaSDavid Teigland 740b3b94faaSDavid Teigland if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) 741b3b94faaSDavid Teigland return 0; 742b3b94faaSDavid Teigland 743e1cb6be9SBob Peterson gfs2_replay_incr_blk(jd, &start); 744b3b94faaSDavid Teigland 745e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 746b3b94faaSDavid Teigland blkno = be64_to_cpu(*ptr++); 747b3b94faaSDavid Teigland 748a17d758bSBob Peterson jd->jd_found_blocks++; 749b3b94faaSDavid Teigland 750a17d758bSBob Peterson if (gfs2_revoke_check(jd, blkno, start)) 751b3b94faaSDavid Teigland continue; 752b3b94faaSDavid Teigland 753b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh_log); 754b3b94faaSDavid Teigland if (error) 755b3b94faaSDavid Teigland return error; 756b3b94faaSDavid Teigland 757b3b94faaSDavid Teigland bh_ip = gfs2_meta_new(gl, blkno); 758b3b94faaSDavid Teigland memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 759b3b94faaSDavid Teigland 760b3b94faaSDavid Teigland if (gfs2_meta_check(sdp, bh_ip)) 761b3b94faaSDavid Teigland error = -EIO; 762b3b94faaSDavid Teigland else 763b3b94faaSDavid Teigland mark_buffer_dirty(bh_ip); 764b3b94faaSDavid Teigland 765b3b94faaSDavid Teigland brelse(bh_log); 766b3b94faaSDavid Teigland brelse(bh_ip); 767b3b94faaSDavid Teigland 768b3b94faaSDavid Teigland if (error) 769b3b94faaSDavid Teigland break; 770b3b94faaSDavid Teigland 771a17d758bSBob Peterson jd->jd_replayed_blocks++; 772b3b94faaSDavid Teigland } 773b3b94faaSDavid Teigland 774b3b94faaSDavid Teigland return error; 775b3b94faaSDavid Teigland } 776b3b94faaSDavid Teigland 7777c0ef28aSSteven Whitehouse /** 7787c0ef28aSSteven Whitehouse * gfs2_meta_sync - Sync all buffers associated with a glock 7797c0ef28aSSteven Whitehouse * @gl: The glock 7807c0ef28aSSteven Whitehouse * 7817c0ef28aSSteven Whitehouse */ 7827c0ef28aSSteven Whitehouse 7837c0ef28aSSteven Whitehouse static void gfs2_meta_sync(struct gfs2_glock *gl) 7847c0ef28aSSteven Whitehouse { 7857c0ef28aSSteven Whitehouse struct address_space *mapping = gfs2_glock2aspace(gl); 78615562c43SBob Peterson struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 7877c0ef28aSSteven Whitehouse int error; 7887c0ef28aSSteven Whitehouse 78970d4ee94SSteven Whitehouse if (mapping == NULL) 79070d4ee94SSteven Whitehouse mapping = &sdp->sd_aspace; 79170d4ee94SSteven Whitehouse 7927c0ef28aSSteven Whitehouse filemap_fdatawrite(mapping); 7937c0ef28aSSteven Whitehouse error = filemap_fdatawait(mapping); 7947c0ef28aSSteven Whitehouse 7957c0ef28aSSteven Whitehouse if (error) 79615562c43SBob Peterson gfs2_io_error(gl->gl_name.ln_sbd); 7977c0ef28aSSteven Whitehouse } 7987c0ef28aSSteven Whitehouse 799b3b94faaSDavid Teigland static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 800b3b94faaSDavid Teigland { 801feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 802feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 803b3b94faaSDavid Teigland 804b3b94faaSDavid Teigland if (error) { 8057276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 806b3b94faaSDavid Teigland return; 807b3b94faaSDavid Teigland } 808b3b94faaSDavid Teigland if (pass != 1) 809b3b94faaSDavid Teigland return; 810b3b94faaSDavid Teigland 8117276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 812b3b94faaSDavid Teigland 813b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", 814a17d758bSBob Peterson jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 815b3b94faaSDavid Teigland } 816b3b94faaSDavid Teigland 817d69a3c65SSteven Whitehouse static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 818b3b94faaSDavid Teigland { 819b3b94faaSDavid Teigland struct gfs2_meta_header *mh; 820b3b94faaSDavid Teigland unsigned int offset; 821a5b1d3fcSAndreas Gruenbacher struct list_head *head = &sdp->sd_log_revokes; 82282e86087SSteven Whitehouse struct gfs2_bufdata *bd; 823e8c92ed7SSteven Whitehouse struct page *page; 824dad30e90SSteven Whitehouse unsigned int length; 825b3b94faaSDavid Teigland 8265d054964SBenjamin Marzinski gfs2_write_revokes(sdp); 827b3b94faaSDavid Teigland if (!sdp->sd_log_num_revoke) 828b3b94faaSDavid Teigland return; 829b3b94faaSDavid Teigland 830dad30e90SSteven Whitehouse length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); 831dad30e90SSteven Whitehouse page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); 832b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 833b3b94faaSDavid Teigland 834c0752aa7SBob Peterson list_for_each_entry(bd, head, bd_list) { 835b3b94faaSDavid Teigland sdp->sd_log_num_revoke--; 836b3b94faaSDavid Teigland 837cd915493SSteven Whitehouse if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { 838b3b94faaSDavid Teigland 839e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 840e8c92ed7SSteven Whitehouse page = mempool_alloc(gfs2_page_pool, GFP_NOIO); 841e8c92ed7SSteven Whitehouse mh = page_address(page); 842e8c92ed7SSteven Whitehouse clear_page(mh); 843b3b94faaSDavid Teigland mh->mh_magic = cpu_to_be32(GFS2_MAGIC); 844e3167dedSSteven Whitehouse mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); 845e3167dedSSteven Whitehouse mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); 846b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 847b3b94faaSDavid Teigland } 848b3b94faaSDavid Teigland 849e8c92ed7SSteven Whitehouse *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); 850cd915493SSteven Whitehouse offset += sizeof(u64); 851b3b94faaSDavid Teigland } 852b3b94faaSDavid Teigland gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); 853b3b94faaSDavid Teigland 854e8c92ed7SSteven Whitehouse gfs2_log_write_page(sdp, page); 855b3b94faaSDavid Teigland } 856b3b94faaSDavid Teigland 85716ca9412SBenjamin Marzinski static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 858f42ab085SSteven Whitehouse { 859a5b1d3fcSAndreas Gruenbacher struct list_head *head = &sdp->sd_log_revokes; 86073118ca8SBob Peterson struct gfs2_bufdata *bd, *tmp; 861f42ab085SSteven Whitehouse 86273118ca8SBob Peterson /* 86373118ca8SBob Peterson * Glocks can be referenced repeatedly on the revoke list, but the list 86473118ca8SBob Peterson * only holds one reference. All glocks on the list will have the 86573118ca8SBob Peterson * GLF_REVOKES flag set initially. 86673118ca8SBob Peterson */ 86773118ca8SBob Peterson 86873118ca8SBob Peterson list_for_each_entry_safe(bd, tmp, head, bd_list) { 86973118ca8SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 87073118ca8SBob Peterson 87173118ca8SBob Peterson if (test_bit(GLF_REVOKES, &gl->gl_flags)) { 87273118ca8SBob Peterson /* Keep each glock on the list exactly once. */ 87373118ca8SBob Peterson clear_bit(GLF_REVOKES, &gl->gl_flags); 87473118ca8SBob Peterson continue; 87573118ca8SBob Peterson } 87673118ca8SBob Peterson list_del(&bd->bd_list); 877f42ab085SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 878f42ab085SSteven Whitehouse } 87973118ca8SBob Peterson list_for_each_entry_safe(bd, tmp, head, bd_list) { 88073118ca8SBob Peterson struct gfs2_glock *gl = bd->bd_gl; 88173118ca8SBob Peterson 88273118ca8SBob Peterson list_del(&bd->bd_list); 88373118ca8SBob Peterson kmem_cache_free(gfs2_bufdata_cachep, bd); 884f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 8859287c645SAndreas Gruenbacher gfs2_glock_queue_put(gl); 8869287c645SAndreas Gruenbacher } 88773118ca8SBob Peterson /* the list is empty now */ 888f42ab085SSteven Whitehouse } 889f42ab085SSteven Whitehouse 890b3b94faaSDavid Teigland static void revoke_lo_before_scan(struct gfs2_jdesc *jd, 89155167622SAl Viro struct gfs2_log_header_host *head, int pass) 892b3b94faaSDavid Teigland { 893b3b94faaSDavid Teigland if (pass != 0) 894b3b94faaSDavid Teigland return; 895b3b94faaSDavid Teigland 896a17d758bSBob Peterson jd->jd_found_revokes = 0; 897a17d758bSBob Peterson jd->jd_replay_tail = head->lh_tail; 898b3b94faaSDavid Teigland } 899b3b94faaSDavid Teigland 9007c70b896SBob Peterson static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 901b3b94faaSDavid Teigland struct gfs2_log_descriptor *ld, __be64 *ptr, 902b3b94faaSDavid Teigland int pass) 903b3b94faaSDavid Teigland { 904feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 905b3b94faaSDavid Teigland unsigned int blks = be32_to_cpu(ld->ld_length); 906b3b94faaSDavid Teigland unsigned int revokes = be32_to_cpu(ld->ld_data1); 907b3b94faaSDavid Teigland struct buffer_head *bh; 908b3b94faaSDavid Teigland unsigned int offset; 909cd915493SSteven Whitehouse u64 blkno; 910b3b94faaSDavid Teigland int first = 1; 911b3b94faaSDavid Teigland int error; 912b3b94faaSDavid Teigland 913b3b94faaSDavid Teigland if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) 914b3b94faaSDavid Teigland return 0; 915b3b94faaSDavid Teigland 916b3b94faaSDavid Teigland offset = sizeof(struct gfs2_log_descriptor); 917b3b94faaSDavid Teigland 918e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 919b3b94faaSDavid Teigland error = gfs2_replay_read_block(jd, start, &bh); 920b3b94faaSDavid Teigland if (error) 921b3b94faaSDavid Teigland return error; 922b3b94faaSDavid Teigland 923b3b94faaSDavid Teigland if (!first) 924b3b94faaSDavid Teigland gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); 925b3b94faaSDavid Teigland 926cd915493SSteven Whitehouse while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { 927b3b94faaSDavid Teigland blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); 928b3b94faaSDavid Teigland 929a17d758bSBob Peterson error = gfs2_revoke_add(jd, blkno, start); 9303ad62e87SBob Peterson if (error < 0) { 9313ad62e87SBob Peterson brelse(bh); 932b3b94faaSDavid Teigland return error; 9333ad62e87SBob Peterson } 934b3b94faaSDavid Teigland else if (error) 935a17d758bSBob Peterson jd->jd_found_revokes++; 936b3b94faaSDavid Teigland 937b3b94faaSDavid Teigland if (!--revokes) 938b3b94faaSDavid Teigland break; 939cd915493SSteven Whitehouse offset += sizeof(u64); 940b3b94faaSDavid Teigland } 941b3b94faaSDavid Teigland 942b3b94faaSDavid Teigland brelse(bh); 943b3b94faaSDavid Teigland offset = sizeof(struct gfs2_meta_header); 944b3b94faaSDavid Teigland first = 0; 945b3b94faaSDavid Teigland } 946b3b94faaSDavid Teigland 947b3b94faaSDavid Teigland return 0; 948b3b94faaSDavid Teigland } 949b3b94faaSDavid Teigland 950b3b94faaSDavid Teigland static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 951b3b94faaSDavid Teigland { 952feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 953b3b94faaSDavid Teigland 954b3b94faaSDavid Teigland if (error) { 955a17d758bSBob Peterson gfs2_revoke_clean(jd); 956b3b94faaSDavid Teigland return; 957b3b94faaSDavid Teigland } 958b3b94faaSDavid Teigland if (pass != 1) 959b3b94faaSDavid Teigland return; 960b3b94faaSDavid Teigland 961b3b94faaSDavid Teigland fs_info(sdp, "jid=%u: Found %u revoke tags\n", 962a17d758bSBob Peterson jd->jd_jid, jd->jd_found_revokes); 963b3b94faaSDavid Teigland 964a17d758bSBob Peterson gfs2_revoke_clean(jd); 965b3b94faaSDavid Teigland } 966b3b94faaSDavid Teigland 96718ec7d5cSSteven Whitehouse /** 96818ec7d5cSSteven Whitehouse * databuf_lo_before_commit - Scan the data buffers, writing as we go 96918ec7d5cSSteven Whitehouse * 97018ec7d5cSSteven Whitehouse */ 971d7b616e2SSteven Whitehouse 972d69a3c65SSteven Whitehouse static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 973b3b94faaSDavid Teigland { 974022ef4feSSteven Whitehouse unsigned int limit = databuf_limit(sdp); 975022ef4feSSteven Whitehouse unsigned int nbuf; 976d69a3c65SSteven Whitehouse if (tr == NULL) 977d69a3c65SSteven Whitehouse return; 978022ef4feSSteven Whitehouse nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm; 979022ef4feSSteven Whitehouse gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1); 980b3b94faaSDavid Teigland } 981b3b94faaSDavid Teigland 9827c70b896SBob Peterson static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start, 98318ec7d5cSSteven Whitehouse struct gfs2_log_descriptor *ld, 98418ec7d5cSSteven Whitehouse __be64 *ptr, int pass) 98518ec7d5cSSteven Whitehouse { 986feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 9875c676f6dSSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 98818ec7d5cSSteven Whitehouse unsigned int blks = be32_to_cpu(ld->ld_data1); 98918ec7d5cSSteven Whitehouse struct buffer_head *bh_log, *bh_ip; 990cd915493SSteven Whitehouse u64 blkno; 991cd915493SSteven Whitehouse u64 esc; 99218ec7d5cSSteven Whitehouse int error = 0; 99318ec7d5cSSteven Whitehouse 99418ec7d5cSSteven Whitehouse if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) 99518ec7d5cSSteven Whitehouse return 0; 99618ec7d5cSSteven Whitehouse 997e1cb6be9SBob Peterson gfs2_replay_incr_blk(jd, &start); 998e1cb6be9SBob Peterson for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) { 99918ec7d5cSSteven Whitehouse blkno = be64_to_cpu(*ptr++); 100018ec7d5cSSteven Whitehouse esc = be64_to_cpu(*ptr++); 100118ec7d5cSSteven Whitehouse 1002a17d758bSBob Peterson jd->jd_found_blocks++; 100318ec7d5cSSteven Whitehouse 1004a17d758bSBob Peterson if (gfs2_revoke_check(jd, blkno, start)) 100518ec7d5cSSteven Whitehouse continue; 100618ec7d5cSSteven Whitehouse 100718ec7d5cSSteven Whitehouse error = gfs2_replay_read_block(jd, start, &bh_log); 100818ec7d5cSSteven Whitehouse if (error) 100918ec7d5cSSteven Whitehouse return error; 101018ec7d5cSSteven Whitehouse 101118ec7d5cSSteven Whitehouse bh_ip = gfs2_meta_new(gl, blkno); 101218ec7d5cSSteven Whitehouse memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); 101318ec7d5cSSteven Whitehouse 101418ec7d5cSSteven Whitehouse /* Unescape */ 101518ec7d5cSSteven Whitehouse if (esc) { 101618ec7d5cSSteven Whitehouse __be32 *eptr = (__be32 *)bh_ip->b_data; 101718ec7d5cSSteven Whitehouse *eptr = cpu_to_be32(GFS2_MAGIC); 101818ec7d5cSSteven Whitehouse } 101918ec7d5cSSteven Whitehouse mark_buffer_dirty(bh_ip); 102018ec7d5cSSteven Whitehouse 102118ec7d5cSSteven Whitehouse brelse(bh_log); 102218ec7d5cSSteven Whitehouse brelse(bh_ip); 102318ec7d5cSSteven Whitehouse 1024a17d758bSBob Peterson jd->jd_replayed_blocks++; 102518ec7d5cSSteven Whitehouse } 102618ec7d5cSSteven Whitehouse 102718ec7d5cSSteven Whitehouse return error; 102818ec7d5cSSteven Whitehouse } 102918ec7d5cSSteven Whitehouse 103018ec7d5cSSteven Whitehouse /* FIXME: sort out accounting for log blocks etc. */ 103118ec7d5cSSteven Whitehouse 103218ec7d5cSSteven Whitehouse static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) 103318ec7d5cSSteven Whitehouse { 1034feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 1035feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 103618ec7d5cSSteven Whitehouse 103718ec7d5cSSteven Whitehouse if (error) { 10387276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 103918ec7d5cSSteven Whitehouse return; 104018ec7d5cSSteven Whitehouse } 104118ec7d5cSSteven Whitehouse if (pass != 1) 104218ec7d5cSSteven Whitehouse return; 104318ec7d5cSSteven Whitehouse 104418ec7d5cSSteven Whitehouse /* data sync? */ 10457276b3b0SSteven Whitehouse gfs2_meta_sync(ip->i_gl); 104618ec7d5cSSteven Whitehouse 104718ec7d5cSSteven Whitehouse fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", 1048a17d758bSBob Peterson jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks); 104918ec7d5cSSteven Whitehouse } 105018ec7d5cSSteven Whitehouse 105116ca9412SBenjamin Marzinski static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) 105218ec7d5cSSteven Whitehouse { 1053d69a3c65SSteven Whitehouse struct list_head *head; 105418ec7d5cSSteven Whitehouse struct gfs2_bufdata *bd; 105518ec7d5cSSteven Whitehouse 1056d69a3c65SSteven Whitehouse if (tr == NULL) 105716ca9412SBenjamin Marzinski return; 105816ca9412SBenjamin Marzinski 1059d69a3c65SSteven Whitehouse head = &tr->tr_databuf; 106018ec7d5cSSteven Whitehouse while (!list_empty(head)) { 1061c0752aa7SBob Peterson bd = list_entry(head->next, struct gfs2_bufdata, bd_list); 1062c0752aa7SBob Peterson list_del_init(&bd->bd_list); 106316ca9412SBenjamin Marzinski gfs2_unpin(sdp, bd->bd_bh, tr); 106418ec7d5cSSteven Whitehouse } 106518ec7d5cSSteven Whitehouse } 106618ec7d5cSSteven Whitehouse 106718ec7d5cSSteven Whitehouse 106832ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_buf_lops = { 1069b3b94faaSDavid Teigland .lo_before_commit = buf_lo_before_commit, 1070b3b94faaSDavid Teigland .lo_after_commit = buf_lo_after_commit, 1071b3b94faaSDavid Teigland .lo_before_scan = buf_lo_before_scan, 1072b3b94faaSDavid Teigland .lo_scan_elements = buf_lo_scan_elements, 1073b3b94faaSDavid Teigland .lo_after_scan = buf_lo_after_scan, 1074ea67eedbSSteven Whitehouse .lo_name = "buf", 1075b3b94faaSDavid Teigland }; 1076b3b94faaSDavid Teigland 107732ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_revoke_lops = { 1078b3b94faaSDavid Teigland .lo_before_commit = revoke_lo_before_commit, 1079f42ab085SSteven Whitehouse .lo_after_commit = revoke_lo_after_commit, 1080b3b94faaSDavid Teigland .lo_before_scan = revoke_lo_before_scan, 1081b3b94faaSDavid Teigland .lo_scan_elements = revoke_lo_scan_elements, 1082b3b94faaSDavid Teigland .lo_after_scan = revoke_lo_after_scan, 1083ea67eedbSSteven Whitehouse .lo_name = "revoke", 1084b3b94faaSDavid Teigland }; 1085b3b94faaSDavid Teigland 108632ac43f6SAndreas Gruenbacher static const struct gfs2_log_operations gfs2_databuf_lops = { 1087b3b94faaSDavid Teigland .lo_before_commit = databuf_lo_before_commit, 108818ec7d5cSSteven Whitehouse .lo_after_commit = databuf_lo_after_commit, 108918ec7d5cSSteven Whitehouse .lo_scan_elements = databuf_lo_scan_elements, 109018ec7d5cSSteven Whitehouse .lo_after_scan = databuf_lo_after_scan, 1091ea67eedbSSteven Whitehouse .lo_name = "databuf", 1092b3b94faaSDavid Teigland }; 1093b3b94faaSDavid Teigland 1094b09e593dSSteven Whitehouse const struct gfs2_log_operations *gfs2_log_ops[] = { 1095b3b94faaSDavid Teigland &gfs2_databuf_lops, 109616615be1SSteven Whitehouse &gfs2_buf_lops, 109716615be1SSteven Whitehouse &gfs2_revoke_lops, 1098ea67eedbSSteven Whitehouse NULL, 1099b3b94faaSDavid Teigland }; 1100b3b94faaSDavid Teigland 1101