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gerrit-public.fairphone.software / kernel / msm-4.19 / e9fc2aa091ab8fa46e60d4c9d06a89305c441652 / . / fs / gfs2 / meta_io.h
blob: 4ddc936aae16d11ab331ab2b4a1e5275055c55a8 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -0400[diff] [blame]3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]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
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400[diff] [blame^]7 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]8 */
9
10#ifndef __DIO_DOT_H__
11#define __DIO_DOT_H__
12
13static inline void gfs2_buffer_clear(struct buffer_head *bh)
14{
15 memset(bh->b_data, 0, bh->b_size);
16}
17
18static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
19{
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400[diff] [blame]20 BUG_ON(head > bh->b_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]21 memset(bh->b_data + head, 0, bh->b_size - head);
22}
23
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]24static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
25 int to_head,
26 struct buffer_head *from_bh,
27 int from_head)
28{
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400[diff] [blame]29 BUG_ON(from_head < to_head);
30 memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]31 from_bh->b_size - from_head);
32 memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400[diff] [blame]33 0, from_head - to_head);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]34}
35
36struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
37void gfs2_aspace_put(struct inode *aspace);
38
39void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
40int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags);
41void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
42void gfs2_ail_empty_gl(struct gfs2_glock *gl);
43
44void gfs2_meta_inval(struct gfs2_glock *gl);
45void gfs2_meta_sync(struct gfs2_glock *gl, int flags);
46
47struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno);
48int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno,
49 int flags, struct buffer_head **bhp);
50int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags);
51
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500[diff] [blame]52void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
53 int meta);
Steven Whitehousea98ab222006-01-18 13:38:44 +0000[diff] [blame]54void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
55void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
56 struct gfs2_ail *ai);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]57
58void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
59
60void gfs2_meta_cache_flush(struct gfs2_inode *ip);
61int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num,
62 int new, struct buffer_head **bhp);
63
64static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
65 struct buffer_head **bhp)
66{
67 return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
68}
69
70void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen);
71void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
72
73#endif /* __DIO_DOT_H__ */
74