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authorDavid Teigland <teigland@redhat.com>2006-01-16 11:50:04 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2006-01-16 11:50:04 -0500
commitb3b94faa5fe5968827ba0640ee9fba4b3e7f736e (patch)
tree70bd6068b050d2c46e338484f8b03fae4365c6c3 /fs/gfs2/meta_io.h
parentf7825dcf8c7301cfd3724eb40c5b443cc85ab7b8 (diff)
[GFS2] The core of GFS2
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/meta_io.h')
-rw-r--r--fs/gfs2/meta_io.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
new file mode 100644
index 000000000000..5556df8cc6c9
--- /dev/null
+++ b/fs/gfs2/meta_io.h
@@ -0,0 +1,88 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 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 v.2.
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{
20 memset(bh->b_data + head, 0, bh->b_size - head);
21}
22
23static inline void gfs2_buffer_clear_ends(struct buffer_head *bh, int offset,
24 int amount, int journaled)
25{
26 int z_off1 = (journaled) ? sizeof(struct gfs2_meta_header) : 0;
27 int z_len1 = offset - z_off1;
28 int z_off2 = offset + amount;
29 int z_len2 = (bh)->b_size - z_off2;
30
31 if (z_len1)
32 memset(bh->b_data + z_off1, 0, z_len1);
33
34 if (z_len2)
35 memset(bh->b_data + z_off2, 0, z_len2);
36}
37
38static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
39 int to_head,
40 struct buffer_head *from_bh,
41 int from_head)
42{
43 memcpy(to_bh->b_data + to_head,
44 from_bh->b_data + from_head,
45 from_bh->b_size - from_head);
46 memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
47 0,
48 from_head - to_head);
49}
50
51struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
52void gfs2_aspace_put(struct inode *aspace);
53
54void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
55int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags);
56void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
57void gfs2_ail_empty_gl(struct gfs2_glock *gl);
58
59void gfs2_meta_inval(struct gfs2_glock *gl);
60void gfs2_meta_sync(struct gfs2_glock *gl, int flags);
61
62struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno);
63int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno,
64 int flags, struct buffer_head **bhp);
65int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags);
66
67void gfs2_meta_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh);
68void gfs2_meta_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
69void gfs2_meta_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
70 struct gfs2_ail *ai);
71
72void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
73
74void gfs2_meta_cache_flush(struct gfs2_inode *ip);
75int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num,
76 int new, struct buffer_head **bhp);
77
78static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
79 struct buffer_head **bhp)
80{
81 return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
82}
83
84void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen);
85void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
86
87#endif /* __DIO_DOT_H__ */
88