| /* |
| * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| * |
| * This copyrighted material is made available to anyone wishing to use, |
| * modify, copy, or redistribute it subject to the terms and conditions |
| * of the GNU General Public License version 2. |
| */ |
| |
| #ifndef __DIO_DOT_H__ |
| #define __DIO_DOT_H__ |
| |
| #include <linux/buffer_head.h> |
| #include <linux/string.h> |
| #include "incore.h" |
| |
| static inline void gfs2_buffer_clear(struct buffer_head *bh) |
| { |
| memset(bh->b_data, 0, bh->b_size); |
| } |
| |
| static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head) |
| { |
| BUG_ON(head > bh->b_size); |
| memset(bh->b_data + head, 0, bh->b_size - head); |
| } |
| |
| static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh, |
| int to_head, |
| struct buffer_head *from_bh, |
| int from_head) |
| { |
| BUG_ON(from_head < to_head); |
| memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head, |
| from_bh->b_size - from_head); |
| memset(to_bh->b_data + to_bh->b_size + to_head - from_head, |
| 0, from_head - to_head); |
| } |
| |
| struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp); |
| void gfs2_aspace_put(struct inode *aspace); |
| |
| void gfs2_meta_inval(struct gfs2_glock *gl); |
| void gfs2_meta_sync(struct gfs2_glock *gl); |
| |
| struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno); |
| int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, |
| int flags, struct buffer_head **bhp); |
| int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh); |
| |
| void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, |
| int meta); |
| |
| void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen); |
| |
| void gfs2_meta_cache_flush(struct gfs2_inode *ip); |
| int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
| int new, struct buffer_head **bhp); |
| |
| static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, |
| struct buffer_head **bhp) |
| { |
| return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, 0, bhp); |
| } |
| |
| struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen); |
| |
| #define buffer_busy(bh) \ |
| ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned))) |
| #define buffer_in_io(bh) \ |
| ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock))) |
| |
| #endif /* __DIO_DOT_H__ */ |
| |