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46bbc5526d
[ Upstream commit 9ff78289356af640941bbb0dd3f46af2063f0046 ] Before this patch, if gfs2_ail_empty_gl saw there was nothing on the ail list, it would return and not flush the log. The problem is that there could still be a revoke for the rgrp sitting on the sd_log_le_revoke list that's been recently taken off the ail list. But that revoke still needs to be written, and the rgrp_go_inval still needs to call log_flush_wait to ensure the revokes are all properly written to the journal before we relinquish control of the glock to another node. If we give the glock to another node before we have this knowledge, the node might crash and its journal replayed, in which case the missing revoke would allow the journal replay to replay the rgrp over top of the rgrp we already gave to another node, thus overwriting its changes and corrupting the file system. This patch makes gfs2_ail_empty_gl still call gfs2_log_flush rather than returning. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#ifndef __LOG_DOT_H__
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#define __LOG_DOT_H__
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/writeback.h>
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#include "incore.h"
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#include "inode.h"
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/**
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* gfs2_log_lock - acquire the right to mess with the log manager
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* @sdp: the filesystem
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*
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*/
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static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
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__acquires(&sdp->sd_log_lock)
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{
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spin_lock(&sdp->sd_log_lock);
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}
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/**
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* gfs2_log_unlock - release the right to mess with the log manager
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* @sdp: the filesystem
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*
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*/
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static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
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__releases(&sdp->sd_log_lock)
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{
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spin_unlock(&sdp->sd_log_lock);
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}
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static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
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unsigned int value)
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{
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if (++value == sdp->sd_jdesc->jd_blocks) {
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value = 0;
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}
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sdp->sd_log_head = sdp->sd_log_tail = value;
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}
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static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
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if (gfs2_is_jdata(ip) || !gfs2_is_ordered(sdp))
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return;
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if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
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spin_lock(&sdp->sd_ordered_lock);
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if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
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list_add(&ip->i_ordered, &sdp->sd_log_ordered);
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spin_unlock(&sdp->sd_ordered_lock);
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}
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}
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extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
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extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
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unsigned int ssize);
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extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
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extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
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extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
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u64 seq, u32 tail, u32 lblock, u32 flags,
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int op_flags);
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extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
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u32 type);
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extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
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extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
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extern void log_flush_wait(struct gfs2_sbd *sdp);
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extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
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extern int gfs2_logd(void *data);
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extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
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extern void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
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extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
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#endif /* __LOG_DOT_H__ */
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