1/*
 2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 3 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 4 *
 5 * This copyrighted material is made available to anyone wishing to use,
 6 * modify, copy, or redistribute it subject to the terms and conditions
 7 * of the GNU General Public License version 2.
 8 */
 9
10#ifndef __DIO_DOT_H__
11#define __DIO_DOT_H__
12
13#include <linux/buffer_head.h>
14#include <linux/string.h>
15#include "incore.h"
16
17static inline void gfs2_buffer_clear(struct buffer_head *bh)
18{
19	memset(bh->b_data, 0, bh->b_size);
20}
21
22static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
23{
24	BUG_ON(head > bh->b_size);
25	memset(bh->b_data + head, 0, bh->b_size - head);
26}
27
28static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
29					 int to_head,
30					 struct buffer_head *from_bh,
31					 int from_head)
32{
33	BUG_ON(from_head < to_head);
34	memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
35	       from_bh->b_size - from_head);
36	memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
37	       0, from_head - to_head);
38}
39
40extern const struct address_space_operations gfs2_meta_aops;
41extern const struct address_space_operations gfs2_rgrp_aops;
42
43static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
44{
45	struct inode *inode = mapping->host;
46	if (mapping->a_ops == &gfs2_meta_aops)
47		return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd;
48	else if (mapping->a_ops == &gfs2_rgrp_aops)
49		return container_of(mapping, struct gfs2_sbd, sd_aspace);
50	else
51		return inode->i_sb->s_fs_info;
52}
53
54extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
55extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
56			  int rahead, struct buffer_head **bhp);
57extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
58extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno,
59				       int create);
60enum {
61	REMOVE_JDATA = 0,
62	REMOVE_META = 1,
63};
64
65extern void gfs2_remove_from_journal(struct buffer_head *bh, int meta);
66extern void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
67extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
68				     struct buffer_head **bhp);
69
70static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
71					 struct buffer_head **bhp)
72{
73	return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp);
74}
75
76struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
77
78#define buffer_busy(bh) \
79((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned)))
80
81#endif /* __DIO_DOT_H__ */
82

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 5 */
 6
 7#ifndef __DIO_DOT_H__
 8#define __DIO_DOT_H__
 9
10#include <linux/buffer_head.h>
11#include <linux/string.h>
12#include "incore.h"
13
14static inline void gfs2_buffer_clear(struct buffer_head *bh)
15{
16	memset(bh->b_data, 0, bh->b_size);
17}
18
19static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
20{
21	BUG_ON(head > bh->b_size);
22	memset(bh->b_data + head, 0, bh->b_size - head);
23}
24
25static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
26					 int to_head,
27					 struct buffer_head *from_bh,
28					 int from_head)
29{
30	BUG_ON(from_head < to_head);
31	memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
32	       from_bh->b_size - from_head);
33	memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
34	       0, from_head - to_head);
35}
36
37extern const struct address_space_operations gfs2_meta_aops;
38extern const struct address_space_operations gfs2_rgrp_aops;
39
40static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
41{
42	struct inode *inode = mapping->host;
43	if (mapping->a_ops == &gfs2_meta_aops)
44		return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd;
45	else if (mapping->a_ops == &gfs2_rgrp_aops)
46		return container_of(mapping, struct gfs2_sbd, sd_aspace);
47	else
48		return inode->i_sb->s_fs_info;
49}
50
51extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
52extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
53			  int rahead, struct buffer_head **bhp);
54extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
55extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno,
56				       int create);
57enum {
58	REMOVE_JDATA = 0,
59	REMOVE_META = 1,
60};
61
62extern void gfs2_remove_from_journal(struct buffer_head *bh, int meta);
63extern void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
64extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
65				     struct buffer_head **bhp);
66
67static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
68					 struct buffer_head **bhp)
69{
70	return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp);
71}
72
73struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
74
75#define buffer_busy(bh) \
76((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned)))
77
78#endif /* __DIO_DOT_H__ */
79