forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.4 KiB
79 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
|
*/ |
|
|
|
#ifndef __DIO_DOT_H__ |
|
#define __DIO_DOT_H__ |
|
|
|
#include <linux/buffer_head.h> |
|
#include <linux/string.h> |
|
#include "incore.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) |
|
{ |
|
BUG_ON(head > bh->b_size); |
|
memset(bh->b_data + head, 0, bh->b_size - head); |
|
} |
|
|
|
static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh, |
|
int to_head, |
|
struct buffer_head *from_bh, |
|
int from_head) |
|
{ |
|
BUG_ON(from_head < to_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); |
|
} |
|
|
|
extern const struct address_space_operations gfs2_meta_aops; |
|
extern const struct address_space_operations gfs2_rgrp_aops; |
|
|
|
static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping) |
|
{ |
|
struct inode *inode = mapping->host; |
|
if (mapping->a_ops == &gfs2_meta_aops) |
|
return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd; |
|
else if (mapping->a_ops == &gfs2_rgrp_aops) |
|
return container_of(mapping, struct gfs2_sbd, sd_aspace); |
|
else |
|
return inode->i_sb->s_fs_info; |
|
} |
|
|
|
extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno); |
|
extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags, |
|
int rahead, struct buffer_head **bhp); |
|
extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh); |
|
extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, |
|
int create); |
|
enum { |
|
REMOVE_JDATA = 0, |
|
REMOVE_META = 1, |
|
}; |
|
|
|
extern void gfs2_remove_from_journal(struct buffer_head *bh, int meta); |
|
extern void gfs2_journal_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen); |
|
extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
|
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_no_addr, bhp); |
|
} |
|
|
|
struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen); |
|
|
|
#define buffer_busy(bh) \ |
|
((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned))) |
|
|
|
#endif /* __DIO_DOT_H__ */ |
|
|
|
|