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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 v.2.
*/
#ifndef __DIO_DOT_H__
#define __DIO_DOT_H__
static inline void gfs2_buffer_clear(struct buffer_head *bh)
{
memset(bh->b_data, 0, bh->b_size);
}
static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
{
memset(bh->b_data + head, 0, bh->b_size - head);
}
static inline void gfs2_buffer_clear_ends(struct buffer_head *bh, int offset,
int amount, int journaled)
{
int z_off1 = (journaled) ? sizeof(struct gfs2_meta_header) : 0;
int z_len1 = offset - z_off1;
int z_off2 = offset + amount;
int z_len2 = (bh)->b_size - z_off2;
if (z_len1)
memset(bh->b_data + z_off1, 0, z_len1);
if (z_len2)
memset(bh->b_data + z_off2, 0, z_len2);
}
static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
int to_head,
struct buffer_head *from_bh,
int from_head)
{
memcpy(to_bh->b_data + to_head,
from_bh->b_data + from_head,
from_bh->b_size - from_head);
memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
0,
from_head - to_head);
}
struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
void gfs2_aspace_put(struct inode *aspace);
void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags);
void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
void gfs2_ail_empty_gl(struct gfs2_glock *gl);
void gfs2_meta_inval(struct gfs2_glock *gl);
void gfs2_meta_sync(struct gfs2_glock *gl, int flags);
struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno);
int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno,
int flags, struct buffer_head **bhp);
int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags);
void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
int meta);
void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
struct gfs2_ail *ai);
void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
void gfs2_meta_cache_flush(struct gfs2_inode *ip);
int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num,
int new, struct buffer_head **bhp);
static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
struct buffer_head **bhp)
{
return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
}
void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen);
void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
#endif /* __DIO_DOT_H__ */
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