2006-01-17 00:50:04 +08:00
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#ifndef __DIO_DOT_H__
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#define __DIO_DOT_H__
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static inline void gfs2_buffer_clear(struct buffer_head *bh)
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{
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memset(bh->b_data, 0, bh->b_size);
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}
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static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
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{
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memset(bh->b_data + head, 0, bh->b_size - head);
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}
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static inline void gfs2_buffer_clear_ends(struct buffer_head *bh, int offset,
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int amount, int journaled)
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{
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int z_off1 = (journaled) ? sizeof(struct gfs2_meta_header) : 0;
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int z_len1 = offset - z_off1;
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int z_off2 = offset + amount;
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int z_len2 = (bh)->b_size - z_off2;
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if (z_len1)
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memset(bh->b_data + z_off1, 0, z_len1);
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if (z_len2)
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memset(bh->b_data + z_off2, 0, z_len2);
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}
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static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
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int to_head,
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struct buffer_head *from_bh,
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int from_head)
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{
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memcpy(to_bh->b_data + to_head,
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from_bh->b_data + from_head,
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from_bh->b_size - from_head);
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memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
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0,
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from_head - to_head);
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}
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struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
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void gfs2_aspace_put(struct inode *aspace);
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void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
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int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags);
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void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai);
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void gfs2_ail_empty_gl(struct gfs2_glock *gl);
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void gfs2_meta_inval(struct gfs2_glock *gl);
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void gfs2_meta_sync(struct gfs2_glock *gl, int flags);
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struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno);
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int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno,
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int flags, struct buffer_head **bhp);
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int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags);
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2006-01-18 19:32:00 +08:00
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void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, int meta);
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2006-01-18 21:38:44 +08:00
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void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
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void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
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struct gfs2_ail *ai);
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2006-01-17 00:50:04 +08:00
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void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
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void gfs2_meta_cache_flush(struct gfs2_inode *ip);
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int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num,
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int new, struct buffer_head **bhp);
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static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
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struct buffer_head **bhp)
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{
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return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
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}
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void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen);
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void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
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#endif /* __DIO_DOT_H__ */
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