2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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.
13 static inline void gfs2_buffer_clear(struct buffer_head
*bh
)
15 memset(bh
->b_data
, 0, bh
->b_size
);
18 static inline void gfs2_buffer_clear_tail(struct buffer_head
*bh
, int head
)
20 BUG_ON(head
> bh
->b_size
);
21 memset(bh
->b_data
+ head
, 0, bh
->b_size
- head
);
24 static inline void gfs2_buffer_copy_tail(struct buffer_head
*to_bh
,
26 struct buffer_head
*from_bh
,
29 BUG_ON(from_head
< to_head
);
30 memcpy(to_bh
->b_data
+ to_head
, from_bh
->b_data
+ from_head
,
31 from_bh
->b_size
- from_head
);
32 memset(to_bh
->b_data
+ to_bh
->b_size
+ to_head
- from_head
,
33 0, from_head
- to_head
);
36 struct inode
*gfs2_aspace_get(struct gfs2_sbd
*sdp
);
37 void gfs2_aspace_put(struct inode
*aspace
);
39 void gfs2_ail1_start_one(struct gfs2_sbd
*sdp
, struct gfs2_ail
*ai
);
40 int gfs2_ail1_empty_one(struct gfs2_sbd
*sdp
, struct gfs2_ail
*ai
, int flags
);
41 void gfs2_ail2_empty_one(struct gfs2_sbd
*sdp
, struct gfs2_ail
*ai
);
42 void gfs2_ail_empty_gl(struct gfs2_glock
*gl
);
44 void gfs2_meta_inval(struct gfs2_glock
*gl
);
45 void gfs2_meta_sync(struct gfs2_glock
*gl
, int flags
);
47 struct buffer_head
*gfs2_meta_new(struct gfs2_glock
*gl
, u64 blkno
);
48 int gfs2_meta_read(struct gfs2_glock
*gl
, u64 blkno
,
49 int flags
, struct buffer_head
**bhp
);
50 int gfs2_meta_reread(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
, int flags
);
52 void gfs2_attach_bufdata(struct gfs2_glock
*gl
, struct buffer_head
*bh
,
54 void gfs2_pin(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
);
55 void gfs2_unpin(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
,
58 void gfs2_meta_wipe(struct gfs2_inode
*ip
, u64 bstart
, u32 blen
);
60 void gfs2_meta_cache_flush(struct gfs2_inode
*ip
);
61 int gfs2_meta_indirect_buffer(struct gfs2_inode
*ip
, int height
, u64 num
,
62 int new, struct buffer_head
**bhp
);
64 static inline int gfs2_meta_inode_buffer(struct gfs2_inode
*ip
,
65 struct buffer_head
**bhp
)
67 return gfs2_meta_indirect_buffer(ip
, 0, ip
->i_num
.no_addr
, 0, bhp
);
70 void gfs2_meta_ra(struct gfs2_glock
*gl
, u64 dblock
, u32 extlen
);
71 void gfs2_meta_syncfs(struct gfs2_sbd
*sdp
);
73 #endif /* __DIO_DOT_H__ */