util.h

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/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 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 __UTIL_DOT_H__
#define __UTIL_DOT_H__

#include <linux/mempool.h>

#include "incore.h"

#define fs_printk(level, fs, fmt, arg...) \
    printk(level "GFS2: fsid=%s: " fmt , (fs)->sd_fsname , ## arg)

#define fs_info(fs, fmt, arg...) \
    fs_printk(KERN_INFO , fs , fmt , ## arg)

#define fs_warn(fs, fmt, arg...) \
    fs_printk(KERN_WARNING , fs , fmt , ## arg)

#define fs_err(fs, fmt, arg...) \
    fs_printk(KERN_ERR, fs , fmt , ## arg)


void gfs2_assert_i(struct gfs2_sbd *sdp);

#define gfs2_assert(sdp, assertion) \
do { \
    if (unlikely(!(assertion))) { \
        gfs2_assert_i(sdp); \
        BUG(); \
        } \
} while (0)


int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
               const char *function, char *file, unsigned int line);

#define gfs2_assert_withdraw(sdp, assertion) \
((likely(assertion)) ? 0 : gfs2_assert_withdraw_i((sdp), #assertion, \
                    __func__, __FILE__, __LINE__))


int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
               const char *function, char *file, unsigned int line);

#define gfs2_assert_warn(sdp, assertion) \
((likely(assertion)) ? 0 : gfs2_assert_warn_i((sdp), #assertion, \
                    __func__, __FILE__, __LINE__))


int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide,
           const char *function, char *file, unsigned int line);

#define gfs2_consist(sdp) \
gfs2_consist_i((sdp), 0, __func__, __FILE__, __LINE__)


int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
             const char *function, char *file, unsigned int line);

#define gfs2_consist_inode(ip) \
gfs2_consist_inode_i((ip), 0, __func__, __FILE__, __LINE__)


int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
             const char *function, char *file, unsigned int line);

#define gfs2_consist_rgrpd(rgd) \
gfs2_consist_rgrpd_i((rgd), 0, __func__, __FILE__, __LINE__)


int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
               const char *type, const char *function,
               char *file, unsigned int line);

static inline int gfs2_meta_check(struct gfs2_sbd *sdp,
                    struct buffer_head *bh)
{
    struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
    u32 magic = be32_to_cpu(mh->mh_magic);
    if (unlikely(magic != GFS2_MAGIC)) {
        printk(KERN_ERR "GFS2: Magic number missing at %llu\n",
               (unsigned long long)bh->b_blocknr);
        return -EIO;
    }
    return 0;
}

int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
               u16 type, u16 t,
               const char *function,
               char *file, unsigned int line);

static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
                    struct buffer_head *bh,
                    u16 type,
                    const char *function,
                    char *file, unsigned int line)
{
    struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
    u32 magic = be32_to_cpu(mh->mh_magic);
    u16 t = be32_to_cpu(mh->mh_type);
    if (unlikely(magic != GFS2_MAGIC))
        return gfs2_meta_check_ii(sdp, bh, "magic number", function,
                      file, line);
        if (unlikely(t != type))
        return gfs2_metatype_check_ii(sdp, bh, type, t, function,
                          file, line);
    return 0;
}

#define gfs2_metatype_check(sdp, bh, type) \
gfs2_metatype_check_i((sdp), (bh), (type), __func__, __FILE__, __LINE__)

static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
                     u16 format)
{
    struct gfs2_meta_header *mh;
    mh = (struct gfs2_meta_header *)bh->b_data;
    mh->mh_type = cpu_to_be32(type);
    mh->mh_format = cpu_to_be32(format);
}


int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
            char *file, unsigned int line);

#define gfs2_io_error(sdp) \
gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);


int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
               const char *function, char *file, unsigned int line);

#define gfs2_io_error_bh(sdp, bh) \
gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__);


extern struct kmem_cache *gfs2_glock_cachep;
extern struct kmem_cache *gfs2_glock_aspace_cachep;
extern struct kmem_cache *gfs2_inode_cachep;
extern struct kmem_cache *gfs2_bufdata_cachep;
extern struct kmem_cache *gfs2_rgrpd_cachep;
extern struct kmem_cache *gfs2_quotad_cachep;
extern struct kmem_cache *gfs2_rsrv_cachep;
extern mempool_t *gfs2_page_pool;

static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
                       unsigned int *p)
{
    unsigned int x;
    spin_lock(&gt->gt_spin);
    x = *p;
    spin_unlock(&gt->gt_spin);
    return x;
}

#define gfs2_tune_get(sdp, field) \
gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)

void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
              unsigned int bit, int new_value);
int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...);

#endif /* __UTIL_DOT_H__ */