c76c4d96bd
The locking in gfs2_attach_bufdata() was type specific (data/meta) which made the function rather confusing. This patch moves the core of gfs2_attach_bufdata() into trans.c renaming it gfs2_alloc_bufdata() and moving the locking into gfs2_trans_add_data()/gfs2_trans_add_meta() As a result all of the locking related to adding data and metadata to the journal is now in these two functions. This should help to clarify what is going on, and give us some opportunities to simplify in some cases. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 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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#ifndef __LOPS_DOT_H__
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#define __LOPS_DOT_H__
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#include <linux/list.h>
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#include "incore.h"
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#define BUF_OFFSET \
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((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
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~(sizeof(__be64) - 1))
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#define DATABUF_OFFSET \
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((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
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~(2 * sizeof(__be64) - 1))
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extern const struct gfs2_log_operations gfs2_glock_lops;
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extern const struct gfs2_log_operations gfs2_buf_lops;
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extern const struct gfs2_log_operations gfs2_revoke_lops;
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extern const struct gfs2_log_operations gfs2_rg_lops;
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extern const struct gfs2_log_operations gfs2_databuf_lops;
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extern const struct gfs2_log_operations *gfs2_log_ops[];
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extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
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extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw);
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extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
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static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
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{
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unsigned int limit;
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limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
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return limit;
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}
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static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
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{
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unsigned int limit;
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limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
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return limit;
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}
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static inline void lops_before_commit(struct gfs2_sbd *sdp)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_commit)
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gfs2_log_ops[x]->lo_before_commit(sdp);
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}
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static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_after_commit)
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gfs2_log_ops[x]->lo_after_commit(sdp, ai);
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}
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static inline void lops_before_scan(struct gfs2_jdesc *jd,
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struct gfs2_log_header_host *head,
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unsigned int pass)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_scan)
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gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
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}
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static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
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struct gfs2_log_descriptor *ld,
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__be64 *ptr,
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unsigned int pass)
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{
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int x, error;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_scan_elements) {
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error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
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ld, ptr, pass);
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if (error)
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return error;
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}
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return 0;
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}
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static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
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unsigned int pass)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_scan)
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gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
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}
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#endif /* __LOPS_DOT_H__ */
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