811 lines
20 KiB
C
811 lines
20 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/gfs2_ondisk.h>
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#include "gfs2.h"
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#include "lm_interface.h"
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#include "incore.h"
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#include "glock.h"
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#include "log.h"
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#include "lops.h"
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#include "meta_io.h"
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#include "recovery.h"
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#include "rgrp.h"
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#include "trans.h"
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#include "util.h"
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static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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struct gfs2_glock *gl;
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struct gfs2_trans *tr = current->journal_info;
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tr->tr_touched = 1;
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if (!list_empty(&le->le_list))
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return;
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gl = container_of(le, struct gfs2_glock, gl_le);
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if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)))
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return;
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gfs2_glock_hold(gl);
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set_bit(GLF_DIRTY, &gl->gl_flags);
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gfs2_log_lock(sdp);
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sdp->sd_log_num_gl++;
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list_add(&le->le_list, &sdp->sd_log_le_gl);
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gfs2_log_unlock(sdp);
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}
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static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
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{
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struct list_head *head = &sdp->sd_log_le_gl;
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struct gfs2_glock *gl;
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while (!list_empty(head)) {
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gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list);
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list_del_init(&gl->gl_le.le_list);
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sdp->sd_log_num_gl--;
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gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl));
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gfs2_glock_put(gl);
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}
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gfs2_assert_warn(sdp, !sdp->sd_log_num_gl);
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}
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static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
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struct gfs2_trans *tr;
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if (!list_empty(&bd->bd_list_tr))
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return;
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tr = current->journal_info;
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tr->tr_touched = 1;
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tr->tr_num_buf++;
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list_add(&bd->bd_list_tr, &tr->tr_list_buf);
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if (!list_empty(&le->le_list))
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return;
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gfs2_trans_add_gl(bd->bd_gl);
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gfs2_meta_check(sdp, bd->bd_bh);
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gfs2_pin(sdp, bd->bd_bh);
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gfs2_log_lock(sdp);
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sdp->sd_log_num_buf++;
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list_add(&le->le_list, &sdp->sd_log_le_buf);
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gfs2_log_unlock(sdp);
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tr->tr_num_buf_new++;
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}
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static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
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{
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struct list_head *head = &tr->tr_list_buf;
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struct gfs2_bufdata *bd;
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while (!list_empty(head)) {
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bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr);
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list_del_init(&bd->bd_list_tr);
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tr->tr_num_buf--;
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}
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gfs2_assert_warn(sdp, !tr->tr_num_buf);
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}
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static void buf_lo_before_commit(struct gfs2_sbd *sdp)
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{
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struct buffer_head *bh;
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struct gfs2_log_descriptor *ld;
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struct gfs2_bufdata *bd1 = NULL, *bd2;
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unsigned int total = sdp->sd_log_num_buf;
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unsigned int offset = sizeof(struct gfs2_log_descriptor);
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unsigned int limit;
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unsigned int num;
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unsigned n;
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__be64 *ptr;
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offset += sizeof(__be64) - 1;
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offset &= ~(sizeof(__be64) - 1);
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limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
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/* for 4k blocks, limit = 503 */
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bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list);
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while(total) {
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num = total;
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if (total > limit)
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num = limit;
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bh = gfs2_log_get_buf(sdp);
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sdp->sd_log_num_hdrs++;
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ld = (struct gfs2_log_descriptor *)bh->b_data;
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ptr = (__be64 *)(bh->b_data + offset);
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ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
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ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
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ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
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ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA);
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ld->ld_length = cpu_to_be32(num + 1);
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ld->ld_data1 = cpu_to_be32(num);
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ld->ld_data2 = cpu_to_be32(0);
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memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
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n = 0;
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list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
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bd_le.le_list) {
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*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
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if (++n >= num)
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break;
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}
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set_buffer_dirty(bh);
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ll_rw_block(WRITE, 1, &bh);
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n = 0;
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list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
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bd_le.le_list) {
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bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
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set_buffer_dirty(bh);
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ll_rw_block(WRITE, 1, &bh);
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if (++n >= num)
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break;
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}
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total -= num;
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}
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}
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static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
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{
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struct list_head *head = &sdp->sd_log_le_buf;
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struct gfs2_bufdata *bd;
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while (!list_empty(head)) {
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bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
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list_del_init(&bd->bd_le.le_list);
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sdp->sd_log_num_buf--;
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gfs2_unpin(sdp, bd->bd_bh, ai);
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}
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gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
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}
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static void buf_lo_before_scan(struct gfs2_jdesc *jd,
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struct gfs2_log_header *head, int pass)
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{
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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if (pass != 0)
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return;
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sdp->sd_found_blocks = 0;
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sdp->sd_replayed_blocks = 0;
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}
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static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
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struct gfs2_log_descriptor *ld, __be64 *ptr,
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int pass)
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{
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struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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struct gfs2_glock *gl = ip->i_gl;
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unsigned int blks = be32_to_cpu(ld->ld_data1);
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struct buffer_head *bh_log, *bh_ip;
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u64 blkno;
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int error = 0;
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if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
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return 0;
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gfs2_replay_incr_blk(sdp, &start);
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for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
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blkno = be64_to_cpu(*ptr++);
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sdp->sd_found_blocks++;
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if (gfs2_revoke_check(sdp, blkno, start))
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continue;
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error = gfs2_replay_read_block(jd, start, &bh_log);
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if (error)
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return error;
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bh_ip = gfs2_meta_new(gl, blkno);
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memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
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if (gfs2_meta_check(sdp, bh_ip))
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error = -EIO;
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else
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mark_buffer_dirty(bh_ip);
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brelse(bh_log);
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brelse(bh_ip);
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if (error)
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break;
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sdp->sd_replayed_blocks++;
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}
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return error;
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}
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static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
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{
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struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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if (error) {
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gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT);
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return;
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}
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if (pass != 1)
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return;
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gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT);
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fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
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jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
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}
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static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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struct gfs2_trans *tr;
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tr = current->journal_info;
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tr->tr_touched = 1;
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tr->tr_num_revoke++;
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gfs2_log_lock(sdp);
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sdp->sd_log_num_revoke++;
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list_add(&le->le_list, &sdp->sd_log_le_revoke);
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gfs2_log_unlock(sdp);
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}
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static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
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{
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struct gfs2_log_descriptor *ld;
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struct gfs2_meta_header *mh;
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struct buffer_head *bh;
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unsigned int offset;
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struct list_head *head = &sdp->sd_log_le_revoke;
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struct gfs2_revoke *rv;
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if (!sdp->sd_log_num_revoke)
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return;
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bh = gfs2_log_get_buf(sdp);
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ld = (struct gfs2_log_descriptor *)bh->b_data;
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ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
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ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
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ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
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ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE);
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ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
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sizeof(u64)));
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ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke);
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ld->ld_data2 = cpu_to_be32(0);
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memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
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offset = sizeof(struct gfs2_log_descriptor);
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while (!list_empty(head)) {
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rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list);
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list_del_init(&rv->rv_le.le_list);
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sdp->sd_log_num_revoke--;
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if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
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set_buffer_dirty(bh);
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ll_rw_block(WRITE, 1, &bh);
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bh = gfs2_log_get_buf(sdp);
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mh = (struct gfs2_meta_header *)bh->b_data;
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mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
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mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
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mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
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offset = sizeof(struct gfs2_meta_header);
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}
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*(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno);
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kfree(rv);
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offset += sizeof(u64);
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}
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gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
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set_buffer_dirty(bh);
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ll_rw_block(WRITE, 1, &bh);
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}
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static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
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struct gfs2_log_header *head, int pass)
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{
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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if (pass != 0)
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return;
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sdp->sd_found_revokes = 0;
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sdp->sd_replay_tail = head->lh_tail;
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}
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static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
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struct gfs2_log_descriptor *ld, __be64 *ptr,
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int pass)
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{
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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unsigned int blks = be32_to_cpu(ld->ld_length);
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unsigned int revokes = be32_to_cpu(ld->ld_data1);
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struct buffer_head *bh;
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unsigned int offset;
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u64 blkno;
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int first = 1;
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int error;
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if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
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return 0;
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offset = sizeof(struct gfs2_log_descriptor);
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for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
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error = gfs2_replay_read_block(jd, start, &bh);
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if (error)
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return error;
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if (!first)
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gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
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while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
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blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
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error = gfs2_revoke_add(sdp, blkno, start);
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if (error < 0)
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return error;
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else if (error)
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sdp->sd_found_revokes++;
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if (!--revokes)
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break;
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offset += sizeof(u64);
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}
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brelse(bh);
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offset = sizeof(struct gfs2_meta_header);
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first = 0;
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}
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return 0;
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}
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static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
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{
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struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
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if (error) {
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gfs2_revoke_clean(sdp);
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return;
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}
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if (pass != 1)
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return;
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fs_info(sdp, "jid=%u: Found %u revoke tags\n",
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jd->jd_jid, sdp->sd_found_revokes);
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gfs2_revoke_clean(sdp);
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}
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static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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struct gfs2_rgrpd *rgd;
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struct gfs2_trans *tr = current->journal_info;
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tr->tr_touched = 1;
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if (!list_empty(&le->le_list))
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return;
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rgd = container_of(le, struct gfs2_rgrpd, rd_le);
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gfs2_rgrp_bh_hold(rgd);
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gfs2_log_lock(sdp);
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sdp->sd_log_num_rg++;
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list_add(&le->le_list, &sdp->sd_log_le_rg);
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gfs2_log_unlock(sdp);
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}
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static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
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{
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struct list_head *head = &sdp->sd_log_le_rg;
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struct gfs2_rgrpd *rgd;
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while (!list_empty(head)) {
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rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list);
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list_del_init(&rgd->rd_le.le_list);
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sdp->sd_log_num_rg--;
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gfs2_rgrp_repolish_clones(rgd);
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gfs2_rgrp_bh_put(rgd);
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}
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gfs2_assert_warn(sdp, !sdp->sd_log_num_rg);
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}
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/**
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* databuf_lo_add - Add a databuf to the transaction.
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*
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* This is used in two distinct cases:
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* i) In ordered write mode
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* We put the data buffer on a list so that we can ensure that its
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* synced to disk at the right time
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* ii) In journaled data mode
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* We need to journal the data block in the same way as metadata in
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* the functions above. The difference is that here we have a tag
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* which is two __be64's being the block number (as per meta data)
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* and a flag which says whether the data block needs escaping or
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* not. This means we need a new log entry for each 251 or so data
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* blocks, which isn't an enormous overhead but twice as much as
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* for normal metadata blocks.
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*/
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static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
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struct gfs2_trans *tr = current->journal_info;
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struct address_space *mapping = bd->bd_bh->b_page->mapping;
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struct gfs2_inode *ip = GFS2_I(mapping->host);
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tr->tr_touched = 1;
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if (list_empty(&bd->bd_list_tr) &&
|
|
(ip->i_di.di_flags & GFS2_DIF_JDATA)) {
|
|
tr->tr_num_buf++;
|
|
list_add(&bd->bd_list_tr, &tr->tr_list_buf);
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
tr->tr_num_buf_new++;
|
|
}
|
|
gfs2_trans_add_gl(bd->bd_gl);
|
|
gfs2_log_lock(sdp);
|
|
if (list_empty(&le->le_list)) {
|
|
if (ip->i_di.di_flags & GFS2_DIF_JDATA)
|
|
sdp->sd_log_num_jdata++;
|
|
sdp->sd_log_num_databuf++;
|
|
list_add(&le->le_list, &sdp->sd_log_le_databuf);
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static int gfs2_check_magic(struct buffer_head *bh)
|
|
{
|
|
struct page *page = bh->b_page;
|
|
void *kaddr;
|
|
__be32 *ptr;
|
|
int rv = 0;
|
|
|
|
kaddr = kmap_atomic(page, KM_USER0);
|
|
ptr = kaddr + bh_offset(bh);
|
|
if (*ptr == cpu_to_be32(GFS2_MAGIC))
|
|
rv = 1;
|
|
kunmap_atomic(page, KM_USER0);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_before_commit - Scan the data buffers, writing as we go
|
|
*
|
|
* Here we scan through the lists of buffers and make the assumption
|
|
* that any buffer thats been pinned is being journaled, and that
|
|
* any unpinned buffer is an ordered write data buffer and therefore
|
|
* will be written back rather than journaled.
|
|
*/
|
|
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
LIST_HEAD(started);
|
|
struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt;
|
|
struct buffer_head *bh = NULL;
|
|
unsigned int offset = sizeof(struct gfs2_log_descriptor);
|
|
struct gfs2_log_descriptor *ld;
|
|
unsigned int limit;
|
|
unsigned int total_dbuf = sdp->sd_log_num_databuf;
|
|
unsigned int total_jdata = sdp->sd_log_num_jdata;
|
|
unsigned int num, n;
|
|
__be64 *ptr = NULL;
|
|
|
|
offset += (2*sizeof(__be64) - 1);
|
|
offset &= ~(2*sizeof(__be64) - 1);
|
|
limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
|
|
|
|
/*
|
|
* Start writing ordered buffers, write journaled buffers
|
|
* into the log along with a header
|
|
*/
|
|
gfs2_log_lock(sdp);
|
|
bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf,
|
|
bd_le.le_list);
|
|
while(total_dbuf) {
|
|
num = total_jdata;
|
|
if (num > limit)
|
|
num = limit;
|
|
n = 0;
|
|
list_for_each_entry_safe_continue(bd1, bdt,
|
|
&sdp->sd_log_le_databuf,
|
|
bd_le.le_list) {
|
|
/* An ordered write buffer */
|
|
if (bd1->bd_bh && !buffer_pinned(bd1->bd_bh)) {
|
|
list_move(&bd1->bd_le.le_list, &started);
|
|
if (bd1 == bd2) {
|
|
bd2 = NULL;
|
|
bd2 = list_prepare_entry(bd2,
|
|
&sdp->sd_log_le_databuf,
|
|
bd_le.le_list);
|
|
}
|
|
total_dbuf--;
|
|
if (bd1->bd_bh) {
|
|
get_bh(bd1->bd_bh);
|
|
if (buffer_dirty(bd1->bd_bh)) {
|
|
gfs2_log_unlock(sdp);
|
|
wait_on_buffer(bd1->bd_bh);
|
|
ll_rw_block(WRITE, 1,
|
|
&bd1->bd_bh);
|
|
gfs2_log_lock(sdp);
|
|
}
|
|
brelse(bd1->bd_bh);
|
|
continue;
|
|
}
|
|
continue;
|
|
} else if (bd1->bd_bh) { /* A journaled buffer */
|
|
int magic;
|
|
gfs2_log_unlock(sdp);
|
|
if (!bh) {
|
|
bh = gfs2_log_get_buf(sdp);
|
|
sdp->sd_log_num_hdrs++;
|
|
ld = (struct gfs2_log_descriptor *)
|
|
bh->b_data;
|
|
ptr = (__be64 *)(bh->b_data + offset);
|
|
ld->ld_header.mh_magic =
|
|
cpu_to_be32(GFS2_MAGIC);
|
|
ld->ld_header.mh_type =
|
|
cpu_to_be32(GFS2_METATYPE_LD);
|
|
ld->ld_header.mh_format =
|
|
cpu_to_be32(GFS2_FORMAT_LD);
|
|
ld->ld_type =
|
|
cpu_to_be32(GFS2_LOG_DESC_JDATA);
|
|
ld->ld_length = cpu_to_be32(num + 1);
|
|
ld->ld_data1 = cpu_to_be32(num);
|
|
ld->ld_data2 = cpu_to_be32(0);
|
|
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
|
|
}
|
|
magic = gfs2_check_magic(bd1->bd_bh);
|
|
*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
|
|
*ptr++ = cpu_to_be64((__u64)magic);
|
|
clear_buffer_escaped(bd1->bd_bh);
|
|
if (unlikely(magic != 0))
|
|
set_buffer_escaped(bd1->bd_bh);
|
|
gfs2_log_lock(sdp);
|
|
if (n++ > num)
|
|
break;
|
|
} else if (!bd1->bd_bh) {
|
|
total_dbuf--;
|
|
sdp->sd_log_num_databuf--;
|
|
list_del_init(&bd1->bd_le.le_list);
|
|
if (bd1 == bd2) {
|
|
bd2 = NULL;
|
|
bd2 = list_prepare_entry(bd2,
|
|
&sdp->sd_log_le_databuf,
|
|
bd_le.le_list);
|
|
}
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd1);
|
|
}
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
if (bh) {
|
|
set_buffer_dirty(bh);
|
|
ll_rw_block(WRITE, 1, &bh);
|
|
bh = NULL;
|
|
}
|
|
n = 0;
|
|
gfs2_log_lock(sdp);
|
|
list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf,
|
|
bd_le.le_list) {
|
|
if (!bd2->bd_bh)
|
|
continue;
|
|
/* copy buffer if it needs escaping */
|
|
gfs2_log_unlock(sdp);
|
|
if (unlikely(buffer_escaped(bd2->bd_bh))) {
|
|
void *kaddr;
|
|
struct page *page = bd2->bd_bh->b_page;
|
|
bh = gfs2_log_get_buf(sdp);
|
|
kaddr = kmap_atomic(page, KM_USER0);
|
|
memcpy(bh->b_data,
|
|
kaddr + bh_offset(bd2->bd_bh),
|
|
sdp->sd_sb.sb_bsize);
|
|
kunmap_atomic(page, KM_USER0);
|
|
*(__be32 *)bh->b_data = 0;
|
|
} else {
|
|
bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
|
|
}
|
|
set_buffer_dirty(bh);
|
|
ll_rw_block(WRITE, 1, &bh);
|
|
gfs2_log_lock(sdp);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
bh = NULL;
|
|
total_dbuf -= num;
|
|
total_jdata -= num;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
|
|
/* Wait on all ordered buffers */
|
|
while (!list_empty(&started)) {
|
|
gfs2_log_lock(sdp);
|
|
bd1 = list_entry(started.next, struct gfs2_bufdata,
|
|
bd_le.le_list);
|
|
list_del_init(&bd1->bd_le.le_list);
|
|
sdp->sd_log_num_databuf--;
|
|
bh = bd1->bd_bh;
|
|
if (bh) {
|
|
bh->b_private = NULL;
|
|
get_bh(bh);
|
|
gfs2_log_unlock(sdp);
|
|
wait_on_buffer(bh);
|
|
brelse(bh);
|
|
} else
|
|
gfs2_log_unlock(sdp);
|
|
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd1);
|
|
}
|
|
|
|
/* We've removed all the ordered write bufs here, so only jdata left */
|
|
gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata);
|
|
}
|
|
|
|
static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld,
|
|
__be64 *ptr, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
unsigned int blks = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh_log, *bh_ip;
|
|
u64 blkno;
|
|
u64 esc;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
esc = be64_to_cpu(*ptr++);
|
|
|
|
sdp->sd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(sdp, blkno, start))
|
|
continue;
|
|
|
|
error = gfs2_replay_read_block(jd, start, &bh_log);
|
|
if (error)
|
|
return error;
|
|
|
|
bh_ip = gfs2_meta_new(gl, blkno);
|
|
memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
|
|
|
|
/* Unescape */
|
|
if (esc) {
|
|
__be32 *eptr = (__be32 *)bh_ip->b_data;
|
|
*eptr = cpu_to_be32(GFS2_MAGIC);
|
|
}
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
if (error)
|
|
break;
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/* FIXME: sort out accounting for log blocks etc. */
|
|
|
|
static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_meta_sync(ip->i_gl,
|
|
DIO_START | DIO_WAIT);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
/* data sync? */
|
|
gfs2_meta_sync(ip->i_gl, DIO_START | DIO_WAIT);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_databuf;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_del_init(&bd->bd_le.le_list);
|
|
sdp->sd_log_num_databuf--;
|
|
sdp->sd_log_num_jdata--;
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata);
|
|
}
|
|
|
|
|
|
const struct gfs2_log_operations gfs2_glock_lops = {
|
|
.lo_add = glock_lo_add,
|
|
.lo_after_commit = glock_lo_after_commit,
|
|
.lo_name = "glock",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_buf_lops = {
|
|
.lo_add = buf_lo_add,
|
|
.lo_incore_commit = buf_lo_incore_commit,
|
|
.lo_before_commit = buf_lo_before_commit,
|
|
.lo_after_commit = buf_lo_after_commit,
|
|
.lo_before_scan = buf_lo_before_scan,
|
|
.lo_scan_elements = buf_lo_scan_elements,
|
|
.lo_after_scan = buf_lo_after_scan,
|
|
.lo_name = "buf",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_revoke_lops = {
|
|
.lo_add = revoke_lo_add,
|
|
.lo_before_commit = revoke_lo_before_commit,
|
|
.lo_before_scan = revoke_lo_before_scan,
|
|
.lo_scan_elements = revoke_lo_scan_elements,
|
|
.lo_after_scan = revoke_lo_after_scan,
|
|
.lo_name = "revoke",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_rg_lops = {
|
|
.lo_add = rg_lo_add,
|
|
.lo_after_commit = rg_lo_after_commit,
|
|
.lo_name = "rg",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.lo_add = databuf_lo_add,
|
|
.lo_incore_commit = buf_lo_incore_commit,
|
|
.lo_before_commit = databuf_lo_before_commit,
|
|
.lo_after_commit = databuf_lo_after_commit,
|
|
.lo_scan_elements = databuf_lo_scan_elements,
|
|
.lo_after_scan = databuf_lo_after_scan,
|
|
.lo_name = "databuf",
|
|
};
|
|
|
|
const struct gfs2_log_operations *gfs2_log_ops[] = {
|
|
&gfs2_glock_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_revoke_lops,
|
|
&gfs2_rg_lops,
|
|
&gfs2_databuf_lops,
|
|
NULL,
|
|
};
|
|
|