535 lines
13 KiB
C
535 lines
13 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 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 v.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 <asm/semaphore.h>
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#include "gfs2.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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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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get_transaction->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 = get_transaction;
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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_meta_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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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_be16(GFS2_METATYPE_LD);
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ld->ld_header.mh_format = cpu_to_be16(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, 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, 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_meta_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 = jd->jd_inode->i_sbd;
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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_sbd *sdp = jd->jd_inode->i_sbd;
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struct gfs2_glock *gl = jd->jd_inode->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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uint64_t 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_sbd *sdp = jd->jd_inode->i_sbd;
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if (error) {
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gfs2_meta_sync(jd->jd_inode->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(jd->jd_inode->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 = get_transaction;
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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_be16(GFS2_METATYPE_LD);
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ld->ld_header.mh_format = cpu_to_be16(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, sizeof(uint64_t)));
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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(&rv->rv_le.le_list);
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sdp->sd_log_num_revoke--;
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if (offset + sizeof(uint64_t) > 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_be16(GFS2_METATYPE_LB);
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mh->mh_format = cpu_to_be16(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(uint64_t);
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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 = jd->jd_inode->i_sbd;
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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 = jd->jd_inode->i_sbd;
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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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uint64_t 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(uint64_t) <= 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(uint64_t);
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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 = jd->jd_inode->i_sbd;
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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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get_transaction->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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static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
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{
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get_transaction->tr_touched = 1;
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gfs2_log_lock(sdp);
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sdp->sd_log_num_databuf++;
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list_add(&le->le_list, &sdp->sd_log_le_databuf);
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gfs2_log_unlock(sdp);
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}
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static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
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{
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struct list_head *head = &sdp->sd_log_le_databuf;
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LIST_HEAD(started);
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struct gfs2_databuf *db;
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struct buffer_head *bh;
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while (!list_empty(head)) {
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db = list_entry(head->prev, struct gfs2_databuf, db_le.le_list);
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list_move(&db->db_le.le_list, &started);
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gfs2_log_lock(sdp);
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bh = db->db_bh;
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if (bh) {
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get_bh(bh);
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gfs2_log_unlock(sdp);
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if (buffer_dirty(bh)) {
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wait_on_buffer(bh);
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ll_rw_block(WRITE, 1, &bh);
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}
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brelse(bh);
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} else
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gfs2_log_unlock(sdp);
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}
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while (!list_empty(&started)) {
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db = list_entry(started.next, struct gfs2_databuf,
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db_le.le_list);
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list_del(&db->db_le.le_list);
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sdp->sd_log_num_databuf--;
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|
|
gfs2_log_lock(sdp);
|
|
bh = db->db_bh;
|
|
if (bh) {
|
|
set_v2db(bh, NULL);
|
|
gfs2_log_unlock(sdp);
|
|
wait_on_buffer(bh);
|
|
brelse(bh);
|
|
} else
|
|
gfs2_log_unlock(sdp);
|
|
|
|
kfree(db);
|
|
}
|
|
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
|
|
}
|
|
|
|
struct gfs2_log_operations gfs2_glock_lops = {
|
|
.lo_add = glock_lo_add,
|
|
.lo_after_commit = glock_lo_after_commit,
|
|
.lo_name = "glock"
|
|
};
|
|
|
|
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"
|
|
};
|
|
|
|
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"
|
|
};
|
|
|
|
struct gfs2_log_operations gfs2_rg_lops = {
|
|
.lo_add = rg_lo_add,
|
|
.lo_after_commit = rg_lo_after_commit,
|
|
.lo_name = "rg"
|
|
};
|
|
|
|
struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.lo_add = databuf_lo_add,
|
|
.lo_before_commit = databuf_lo_before_commit,
|
|
.lo_name = "databuf"
|
|
};
|
|
|
|
struct gfs2_log_operations *gfs2_log_ops[] = {
|
|
&gfs2_glock_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_revoke_lops,
|
|
&gfs2_rg_lops,
|
|
&gfs2_databuf_lops,
|
|
NULL
|
|
};
|
|
|