f55ab26a8f
As well as a number of minor bug fixes, this patch changes GFS to use mutices rather than semaphores. This results in better information in case there are any locking problems. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
66 lines
1.8 KiB
C
66 lines
1.8 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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#ifndef __LOG_DOT_H__
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#define __LOG_DOT_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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{
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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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{
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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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sdp->sd_log_wraps++;
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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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unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
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unsigned int ssize);
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void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags);
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int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags);
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int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
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void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
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struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
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struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
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struct buffer_head *real);
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#define gfs2_log_flush(sdp) gfs2_log_flush_i((sdp), NULL)
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#define gfs2_log_flush_glock(gl) gfs2_log_flush_i((gl)->gl_sbd, (gl))
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void gfs2_log_flush_i(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
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void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
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void gfs2_log_shutdown(struct gfs2_sbd *sdp);
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#endif /* __LOG_DOT_H__ */
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