Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...

[mirror_ubuntu-artful-kernel.git] / fs / gfs2 / util.h

/*
 * 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__

#ifdef pr_fmt
#undef pr_fmt
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#endif

#include <linux/mempool.h>

#include "incore.h"

#define fs_emerg(fs, fmt, ...)						\
	pr_emerg("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
#define fs_warn(fs, fmt, ...)						\
	pr_warn("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
#define fs_err(fs, fmt, ...)						\
	pr_err("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
#define fs_info(fs, fmt, ...)						\
	pr_info("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)

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)) {
		pr_err("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_qadata_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)

__printf(2, 3)
int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...);

#endif /* __UTIL_DOT_H__ */