99 строки
3.0 KiB
C
99 строки
3.0 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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* The minimum amount of log space required for a log flush is one block for
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* revokes and one block for the log header. Log flushes other than
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* GFS2_LOG_HEAD_FLUSH_NORMAL may write one or two more log headers.
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*/
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#define GFS2_LOG_FLUSH_MIN_BLOCKS 4
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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_tail = value;
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sdp->sd_log_flush_tail = value;
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sdp->sd_log_head = 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 (list_empty(&ip->i_ordered)) {
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spin_lock(&sdp->sd_ordered_lock);
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if (list_empty(&ip->i_ordered))
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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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extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
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extern bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
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extern void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
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extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
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extern bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
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unsigned int *extra_revokes);
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extern void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
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unsigned int *extra_revokes);
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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 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_flush_revokes(struct gfs2_sbd *sdp);
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extern void gfs2_ail_drain(struct gfs2_sbd *sdp);
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#endif /* __LOG_DOT_H__ */
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