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 v.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 memset(bh->b_data + head, 0, bh->b_size - head);
23 static inline void gfs2_buffer_clear_ends(struct buffer_head *bh, int offset,
24 int amount, int journaled)
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;
32 memset(bh->b_data + z_off1, 0, z_len1);
35 memset(bh->b_data + z_off2, 0, z_len2);
38 static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
40 struct buffer_head *from_bh,
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,
51 struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
52 void gfs2_aspace_put(struct inode *aspace);
54 void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
55 int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags);
56 void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
57 void gfs2_ail_empty_gl(struct gfs2_glock *gl);
59 void gfs2_meta_inval(struct gfs2_glock *gl);
60 void gfs2_meta_sync(struct gfs2_glock *gl, int flags);
62 struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno);
63 int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno,
64 int flags, struct buffer_head **bhp);
65 int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags);
67 void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
69 void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
70 void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
73 void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
75 void gfs2_meta_cache_flush(struct gfs2_inode *ip);
76 int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num,
77 int new, struct buffer_head **bhp);
79 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
80 struct buffer_head **bhp)
82 return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
85 void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen);
86 void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
88 #endif /* __DIO_DOT_H__ */