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root/fs/gfs2/lops.h

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INCLUDED FROM


DEFINITIONS

This source file includes following definitions.
  1. buf_limit
  2. databuf_limit
  3. lops_init_le
  4. lops_add
  5. lops_before_commit
  6. lops_after_commit
  7. lops_before_scan
  8. lops_scan_elements
  9. lops_after_scan

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#ifndef __LOPS_DOT_H__
#define __LOPS_DOT_H__

#include <linux/list.h>
#include "incore.h"

#define BUF_OFFSET \
        ((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
         ~(sizeof(__be64) - 1))
#define DATABUF_OFFSET \
        ((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
         ~(2 * sizeof(__be64) - 1))

extern const struct gfs2_log_operations gfs2_glock_lops;
extern const struct gfs2_log_operations gfs2_buf_lops;
extern const struct gfs2_log_operations gfs2_revoke_lops;
extern const struct gfs2_log_operations gfs2_rg_lops;
extern const struct gfs2_log_operations gfs2_databuf_lops;

extern const struct gfs2_log_operations *gfs2_log_ops[];

static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
{
        unsigned int limit;

        limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
        return limit;
}

static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
{
        unsigned int limit;

        limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
        return limit;
}

static inline void lops_init_le(struct gfs2_log_element *le,
                                const struct gfs2_log_operations *lops)
{
        INIT_LIST_HEAD(&le->le_list);
        le->le_ops = lops;
}

static inline void lops_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
{
        if (le->le_ops->lo_add)
                le->le_ops->lo_add(sdp, le);
}

static inline void lops_before_commit(struct gfs2_sbd *sdp)
{
        int x;
        for (x = 0; gfs2_log_ops[x]; x++)
                if (gfs2_log_ops[x]->lo_before_commit)
                        gfs2_log_ops[x]->lo_before_commit(sdp);
}

static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
{
        int x;
        for (x = 0; gfs2_log_ops[x]; x++)
                if (gfs2_log_ops[x]->lo_after_commit)
                        gfs2_log_ops[x]->lo_after_commit(sdp, ai);
}

static inline void lops_before_scan(struct gfs2_jdesc *jd,
                                    struct gfs2_log_header_host *head,
                                    unsigned int pass)
{
        int x;
        for (x = 0; gfs2_log_ops[x]; x++)
                if (gfs2_log_ops[x]->lo_before_scan)
                        gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
}

static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
                                     struct gfs2_log_descriptor *ld,
                                     __be64 *ptr,
                                     unsigned int pass)
{
        int x, error;
        for (x = 0; gfs2_log_ops[x]; x++)
                if (gfs2_log_ops[x]->lo_scan_elements) {
                        error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
                                                                  ld, ptr, pass);
                        if (error)
                                return error;
                }

        return 0;
}

static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
                                   unsigned int pass)
{
        int x;
        for (x = 0; gfs2_log_ops[x]; x++)
                if (gfs2_log_ops[x]->lo_before_scan)
                        gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
}

#endif /* __LOPS_DOT_H__ */


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