| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame^] | 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 | |
| 13 | static inline void gfs2_buffer_clear(struct buffer_head *bh) |
| 14 | { |
| 15 | memset(bh->b_data, 0, bh->b_size); |
| 16 | } |
| 17 | |
| 18 | static 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 | |
| 23 | static 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 | |
| 38 | static 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 | |
| 51 | struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp); |
| 52 | void gfs2_aspace_put(struct inode *aspace); |
| 53 | |
| 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); |
| 58 | |
| 59 | void gfs2_meta_inval(struct gfs2_glock *gl); |
| 60 | void gfs2_meta_sync(struct gfs2_glock *gl, int flags); |
| 61 | |
| 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); |
| 66 | |
| 67 | void gfs2_meta_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh); |
| 68 | void gfs2_meta_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); |
| 69 | void gfs2_meta_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, |
| 70 | struct gfs2_ail *ai); |
| 71 | |
| 72 | void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen); |
| 73 | |
| 74 | void gfs2_meta_cache_flush(struct gfs2_inode *ip); |
| 75 | int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num, |
| 76 | int new, struct buffer_head **bhp); |
| 77 | |
| 78 | static 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 | |
| 84 | void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen); |
| 85 | void gfs2_meta_syncfs(struct gfs2_sbd *sdp); |
| 86 | |
| 87 | #endif /* __DIO_DOT_H__ */ |
| 88 | |