forked from luck/tmp_suning_uos_patched
c50b91c4bd
This is another clean up in the logging code. This per-transaction list was largely unused. Its main function was to ensure that the number of buffers in a transaction was correct, however that counter was only used to check the number of buffers in the bd_list_tr, plus an assert at the end of each transaction. With the assert now changed to use the calculated buffer counts, we can remove both bd_list_tr and its associated counter. This should make the code easier to understand as well as shrinking a couple of structures. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
938 lines
23 KiB
C
938 lines
23 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/mempool.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/bio.h>
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#include <linux/fs.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "inode.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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#include "trace_gfs2.h"
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/**
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* gfs2_pin - Pin a buffer in memory
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* @sdp: The superblock
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* @bh: The buffer to be pinned
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*
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* The log lock must be held when calling this function
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*/
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static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
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{
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struct gfs2_bufdata *bd;
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BUG_ON(!current->journal_info);
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clear_buffer_dirty(bh);
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if (test_set_buffer_pinned(bh))
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gfs2_assert_withdraw(sdp, 0);
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if (!buffer_uptodate(bh))
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gfs2_io_error_bh(sdp, bh);
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bd = bh->b_private;
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/* If this buffer is in the AIL and it has already been written
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* to in-place disk block, remove it from the AIL.
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*/
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spin_lock(&sdp->sd_ail_lock);
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if (bd->bd_ail)
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list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
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spin_unlock(&sdp->sd_ail_lock);
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get_bh(bh);
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atomic_inc(&sdp->sd_log_pinned);
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trace_gfs2_pin(bd, 1);
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}
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static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
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{
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return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
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}
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static void maybe_release_space(struct gfs2_bufdata *bd)
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{
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struct gfs2_glock *gl = bd->bd_gl;
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struct gfs2_sbd *sdp = gl->gl_sbd;
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struct gfs2_rgrpd *rgd = gl->gl_object;
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unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
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struct gfs2_bitmap *bi = rgd->rd_bits + index;
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if (bi->bi_clone == 0)
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return;
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if (sdp->sd_args.ar_discard)
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gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
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memcpy(bi->bi_clone + bi->bi_offset,
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bd->bd_bh->b_data + bi->bi_offset, bi->bi_len);
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clear_bit(GBF_FULL, &bi->bi_flags);
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rgd->rd_free_clone = rgd->rd_free;
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}
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/**
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* gfs2_unpin - Unpin a buffer
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* @sdp: the filesystem the buffer belongs to
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* @bh: The buffer to unpin
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* @ai:
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* @flags: The inode dirty flags
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*
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*/
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static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
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struct gfs2_ail *ai)
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{
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struct gfs2_bufdata *bd = bh->b_private;
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BUG_ON(!buffer_uptodate(bh));
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BUG_ON(!buffer_pinned(bh));
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lock_buffer(bh);
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mark_buffer_dirty(bh);
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clear_buffer_pinned(bh);
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if (buffer_is_rgrp(bd))
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maybe_release_space(bd);
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spin_lock(&sdp->sd_ail_lock);
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if (bd->bd_ail) {
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list_del(&bd->bd_ail_st_list);
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brelse(bh);
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} else {
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struct gfs2_glock *gl = bd->bd_gl;
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list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
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atomic_inc(&gl->gl_ail_count);
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}
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bd->bd_ail = ai;
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list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
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spin_unlock(&sdp->sd_ail_lock);
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clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
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trace_gfs2_pin(bd, 0);
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unlock_buffer(bh);
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atomic_dec(&sdp->sd_log_pinned);
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}
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static void gfs2_log_incr_head(struct gfs2_sbd *sdp)
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{
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BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
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(sdp->sd_log_flush_head != sdp->sd_log_head));
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if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) {
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sdp->sd_log_flush_head = 0;
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sdp->sd_log_flush_wrapped = 1;
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}
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}
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static u64 gfs2_log_bmap(struct gfs2_sbd *sdp)
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{
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unsigned int lbn = sdp->sd_log_flush_head;
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struct gfs2_journal_extent *je;
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u64 block;
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list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) {
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if (lbn >= je->lblock && lbn < je->lblock + je->blocks) {
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block = je->dblock + lbn - je->lblock;
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gfs2_log_incr_head(sdp);
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return block;
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}
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}
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return -1;
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}
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/**
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* gfs2_end_log_write_bh - end log write of pagecache data with buffers
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* @sdp: The superblock
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* @bvec: The bio_vec
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* @error: The i/o status
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*
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* This finds the relavent buffers and unlocks then and sets the
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* error flag according to the status of the i/o request. This is
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* used when the log is writing data which has an in-place version
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* that is pinned in the pagecache.
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*/
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static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec,
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int error)
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{
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struct buffer_head *bh, *next;
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struct page *page = bvec->bv_page;
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unsigned size;
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bh = page_buffers(page);
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size = bvec->bv_len;
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while (bh_offset(bh) < bvec->bv_offset)
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bh = bh->b_this_page;
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do {
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if (error)
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set_buffer_write_io_error(bh);
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unlock_buffer(bh);
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next = bh->b_this_page;
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size -= bh->b_size;
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brelse(bh);
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bh = next;
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} while(bh && size);
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}
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/**
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* gfs2_end_log_write - end of i/o to the log
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* @bio: The bio
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* @error: Status of i/o request
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*
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* Each bio_vec contains either data from the pagecache or data
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* relating to the log itself. Here we iterate over the bio_vec
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* array, processing both kinds of data.
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*
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*/
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static void gfs2_end_log_write(struct bio *bio, int error)
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{
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struct gfs2_sbd *sdp = bio->bi_private;
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struct bio_vec *bvec;
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struct page *page;
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int i;
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if (error) {
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sdp->sd_log_error = error;
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fs_err(sdp, "Error %d writing to log\n", error);
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}
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bio_for_each_segment(bvec, bio, i) {
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page = bvec->bv_page;
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if (page_has_buffers(page))
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gfs2_end_log_write_bh(sdp, bvec, error);
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else
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mempool_free(page, gfs2_page_pool);
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}
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bio_put(bio);
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if (atomic_dec_and_test(&sdp->sd_log_in_flight))
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wake_up(&sdp->sd_log_flush_wait);
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}
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/**
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* gfs2_log_flush_bio - Submit any pending log bio
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* @sdp: The superblock
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* @rw: The rw flags
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*
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* Submit any pending part-built or full bio to the block device. If
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* there is no pending bio, then this is a no-op.
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*/
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void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw)
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{
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if (sdp->sd_log_bio) {
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atomic_inc(&sdp->sd_log_in_flight);
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submit_bio(rw, sdp->sd_log_bio);
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sdp->sd_log_bio = NULL;
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}
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}
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/**
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* gfs2_log_alloc_bio - Allocate a new bio for log writing
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* @sdp: The superblock
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* @blkno: The next device block number we want to write to
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*
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* This should never be called when there is a cached bio in the
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* super block. When it returns, there will be a cached bio in the
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* super block which will have as many bio_vecs as the device is
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* happy to handle.
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*
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* Returns: Newly allocated bio
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*/
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static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno)
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{
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struct super_block *sb = sdp->sd_vfs;
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unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev);
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struct bio *bio;
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BUG_ON(sdp->sd_log_bio);
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while (1) {
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bio = bio_alloc(GFP_NOIO, nrvecs);
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if (likely(bio))
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break;
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nrvecs = max(nrvecs/2, 1U);
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}
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bio->bi_sector = blkno * (sb->s_blocksize >> 9);
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bio->bi_bdev = sb->s_bdev;
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bio->bi_end_io = gfs2_end_log_write;
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bio->bi_private = sdp;
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sdp->sd_log_bio = bio;
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return bio;
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}
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/**
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* gfs2_log_get_bio - Get cached log bio, or allocate a new one
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* @sdp: The superblock
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* @blkno: The device block number we want to write to
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*
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* If there is a cached bio, then if the next block number is sequential
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* with the previous one, return it, otherwise flush the bio to the
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* device. If there is not a cached bio, or we just flushed it, then
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* allocate a new one.
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*
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* Returns: The bio to use for log writes
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*/
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static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno)
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{
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struct bio *bio = sdp->sd_log_bio;
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u64 nblk;
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if (bio) {
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nblk = bio->bi_sector + bio_sectors(bio);
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nblk >>= sdp->sd_fsb2bb_shift;
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if (blkno == nblk)
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return bio;
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gfs2_log_flush_bio(sdp, WRITE);
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}
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return gfs2_log_alloc_bio(sdp, blkno);
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}
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/**
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* gfs2_log_write - write to log
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* @sdp: the filesystem
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* @page: the page to write
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* @size: the size of the data to write
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* @offset: the offset within the page
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*
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* Try and add the page segment to the current bio. If that fails,
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* submit the current bio to the device and create a new one, and
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* then add the page segment to that.
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*/
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static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
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unsigned size, unsigned offset)
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{
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u64 blkno = gfs2_log_bmap(sdp);
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struct bio *bio;
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int ret;
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bio = gfs2_log_get_bio(sdp, blkno);
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ret = bio_add_page(bio, page, size, offset);
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if (ret == 0) {
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gfs2_log_flush_bio(sdp, WRITE);
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bio = gfs2_log_alloc_bio(sdp, blkno);
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ret = bio_add_page(bio, page, size, offset);
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WARN_ON(ret == 0);
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}
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}
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/**
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* gfs2_log_write_bh - write a buffer's content to the log
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* @sdp: The super block
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* @bh: The buffer pointing to the in-place location
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*
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* This writes the content of the buffer to the next available location
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* in the log. The buffer will be unlocked once the i/o to the log has
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* completed.
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*/
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static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
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{
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gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh));
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}
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/**
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* gfs2_log_write_page - write one block stored in a page, into the log
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* @sdp: The superblock
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* @page: The struct page
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*
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* This writes the first block-sized part of the page into the log. Note
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* that the page must have been allocated from the gfs2_page_pool mempool
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* and that after this has been called, ownership has been transferred and
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* the page may be freed at any time.
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*/
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void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
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{
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struct super_block *sb = sdp->sd_vfs;
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gfs2_log_write(sdp, page, sb->s_blocksize, 0);
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}
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static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
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u32 ld_length, u32 ld_data1)
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{
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void *page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
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struct gfs2_log_descriptor *ld = page_address(page);
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clear_page(ld);
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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(ld_type);
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ld->ld_length = cpu_to_be32(ld_length);
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ld->ld_data1 = cpu_to_be32(ld_data1);
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ld->ld_data2 = 0;
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return page;
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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_meta_header *mh;
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struct gfs2_trans *tr;
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lock_buffer(bd->bd_bh);
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gfs2_log_lock(sdp);
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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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goto out;
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set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
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set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
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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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mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
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mh->__pad0 = cpu_to_be64(0);
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mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
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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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tr->tr_num_buf_new++;
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out:
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gfs2_log_unlock(sdp);
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unlock_buffer(bd->bd_bh);
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}
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static void gfs2_check_magic(struct buffer_head *bh)
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{
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void *kaddr;
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__be32 *ptr;
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clear_buffer_escaped(bh);
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kaddr = kmap_atomic(bh->b_page);
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ptr = kaddr + bh_offset(bh);
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if (*ptr == cpu_to_be32(GFS2_MAGIC))
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set_buffer_escaped(bh);
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kunmap_atomic(kaddr);
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}
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static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
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unsigned int total, struct list_head *blist,
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bool is_databuf)
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{
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struct gfs2_log_descriptor *ld;
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struct gfs2_bufdata *bd1 = NULL, *bd2;
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struct page *page;
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unsigned int num;
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unsigned n;
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__be64 *ptr;
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gfs2_log_lock(sdp);
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bd1 = bd2 = list_prepare_entry(bd1, blist, 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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gfs2_log_unlock(sdp);
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page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA, num + 1, num);
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ld = page_address(page);
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gfs2_log_lock(sdp);
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ptr = (__be64 *)(ld + 1);
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n = 0;
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list_for_each_entry_continue(bd1, blist, bd_le.le_list) {
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*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
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if (is_databuf) {
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gfs2_check_magic(bd1->bd_bh);
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*ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0);
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}
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if (++n >= num)
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break;
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}
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gfs2_log_unlock(sdp);
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gfs2_log_write_page(sdp, page);
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gfs2_log_lock(sdp);
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n = 0;
|
|
list_for_each_entry_continue(bd2, blist, bd_le.le_list) {
|
|
get_bh(bd2->bd_bh);
|
|
gfs2_log_unlock(sdp);
|
|
lock_buffer(bd2->bd_bh);
|
|
|
|
if (buffer_escaped(bd2->bd_bh)) {
|
|
void *kaddr;
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
ptr = page_address(page);
|
|
kaddr = kmap_atomic(bd2->bd_bh->b_page);
|
|
memcpy(ptr, kaddr + bh_offset(bd2->bd_bh),
|
|
bd2->bd_bh->b_size);
|
|
kunmap_atomic(kaddr);
|
|
*(__be32 *)ptr = 0;
|
|
clear_buffer_escaped(bd2->bd_bh);
|
|
unlock_buffer(bd2->bd_bh);
|
|
brelse(bd2->bd_bh);
|
|
gfs2_log_write_page(sdp, page);
|
|
} else {
|
|
gfs2_log_write_bh(sdp, bd2->bd_bh);
|
|
}
|
|
gfs2_log_lock(sdp);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
BUG_ON(total < num);
|
|
total -= num;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static void buf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
|
|
|
|
gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf,
|
|
&sdp->sd_log_le_buf, 0);
|
|
}
|
|
|
|
static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_buf;
|
|
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_buf--;
|
|
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
|
|
}
|
|
|
|
static void buf_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_blocks = 0;
|
|
sdp->sd_replayed_blocks = 0;
|
|
}
|
|
|
|
static int buf_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;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = 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);
|
|
|
|
if (gfs2_meta_check(sdp, bh_ip))
|
|
error = -EIO;
|
|
else
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
|
|
if (error)
|
|
break;
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static void buf_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);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
|
|
struct gfs2_glock *gl = bd->bd_gl;
|
|
struct gfs2_trans *tr;
|
|
|
|
tr = current->journal_info;
|
|
tr->tr_touched = 1;
|
|
tr->tr_num_revoke++;
|
|
sdp->sd_log_num_revoke++;
|
|
atomic_inc(&gl->gl_revokes);
|
|
set_bit(GLF_LFLUSH, &gl->gl_flags);
|
|
list_add(&le->le_list, &sdp->sd_log_le_revoke);
|
|
}
|
|
|
|
static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_meta_header *mh;
|
|
unsigned int offset;
|
|
struct list_head *head = &sdp->sd_log_le_revoke;
|
|
struct gfs2_bufdata *bd;
|
|
struct page *page;
|
|
unsigned int length;
|
|
|
|
if (!sdp->sd_log_num_revoke)
|
|
return;
|
|
|
|
length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64));
|
|
page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
|
|
ld = page_address(page);
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
list_for_each_entry(bd, head, bd_le.le_list) {
|
|
sdp->sd_log_num_revoke--;
|
|
|
|
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
|
|
|
|
gfs2_log_write_page(sdp, page);
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
mh = page_address(page);
|
|
clear_page(mh);
|
|
mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
|
|
mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
}
|
|
|
|
*(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno);
|
|
offset += sizeof(u64);
|
|
}
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
|
|
|
|
gfs2_log_write_page(sdp, page);
|
|
}
|
|
|
|
static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_revoke;
|
|
struct gfs2_bufdata *bd;
|
|
struct gfs2_glock *gl;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_del_init(&bd->bd_le.le_list);
|
|
gl = bd->bd_gl;
|
|
atomic_dec(&gl->gl_revokes);
|
|
clear_bit(GLF_LFLUSH, &gl->gl_flags);
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd);
|
|
}
|
|
}
|
|
|
|
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_revokes = 0;
|
|
sdp->sd_replay_tail = head->lh_tail;
|
|
}
|
|
|
|
static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld, __be64 *ptr,
|
|
int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
unsigned int blks = be32_to_cpu(ld->ld_length);
|
|
unsigned int revokes = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh;
|
|
unsigned int offset;
|
|
u64 blkno;
|
|
int first = 1;
|
|
int error;
|
|
|
|
if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
|
|
return 0;
|
|
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
error = gfs2_replay_read_block(jd, start, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!first)
|
|
gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
|
|
|
|
while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
|
|
blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
|
|
|
|
error = gfs2_revoke_add(sdp, blkno, start);
|
|
if (error < 0) {
|
|
brelse(bh);
|
|
return error;
|
|
}
|
|
else if (error)
|
|
sdp->sd_found_revokes++;
|
|
|
|
if (!--revokes)
|
|
break;
|
|
offset += sizeof(u64);
|
|
}
|
|
|
|
brelse(bh);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
first = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_revoke_clean(sdp);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
fs_info(sdp, "jid=%u: Found %u revoke tags\n",
|
|
jd->jd_jid, sdp->sd_found_revokes);
|
|
|
|
gfs2_revoke_clean(sdp);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_add - Add a databuf to the transaction.
|
|
*
|
|
* This is used in two distinct cases:
|
|
* i) In ordered write mode
|
|
* We put the data buffer on a list so that we can ensure that its
|
|
* synced to disk at the right time
|
|
* ii) In journaled data mode
|
|
* We need to journal the data block in the same way as metadata in
|
|
* the functions above. The difference is that here we have a tag
|
|
* which is two __be64's being the block number (as per meta data)
|
|
* and a flag which says whether the data block needs escaping or
|
|
* not. This means we need a new log entry for each 251 or so data
|
|
* blocks, which isn't an enormous overhead but twice as much as
|
|
* for normal metadata blocks.
|
|
*/
|
|
static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
|
|
struct gfs2_trans *tr = current->journal_info;
|
|
struct address_space *mapping = bd->bd_bh->b_page->mapping;
|
|
struct gfs2_inode *ip = GFS2_I(mapping->host);
|
|
|
|
lock_buffer(bd->bd_bh);
|
|
gfs2_log_lock(sdp);
|
|
if (tr)
|
|
tr->tr_touched = 1;
|
|
if (!list_empty(&le->le_list))
|
|
goto out;
|
|
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
|
|
if (gfs2_is_jdata(ip)) {
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
tr->tr_num_databuf_new++;
|
|
sdp->sd_log_num_databuf++;
|
|
list_add_tail(&le->le_list, &sdp->sd_log_le_databuf);
|
|
} else {
|
|
list_add_tail(&le->le_list, &sdp->sd_log_le_ordered);
|
|
}
|
|
out:
|
|
gfs2_log_unlock(sdp);
|
|
unlock_buffer(bd->bd_bh);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_before_commit - Scan the data buffers, writing as we go
|
|
*
|
|
*/
|
|
|
|
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit = buf_limit(sdp) / 2;
|
|
|
|
gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf,
|
|
&sdp->sd_log_le_databuf, 1);
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
/* data sync? */
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
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--;
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
|
|
}
|
|
|
|
|
|
const struct gfs2_log_operations gfs2_buf_lops = {
|
|
.lo_add = buf_lo_add,
|
|
.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_after_commit = revoke_lo_after_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_name = "rg",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.lo_add = databuf_lo_add,
|
|
.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_databuf_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_rg_lops,
|
|
&gfs2_revoke_lops,
|
|
NULL,
|
|
};
|
|
|