forked from luck/tmp_suning_uos_patched
a98ab2204f
Since we'll need to pin data if we are going to journal it, then I'm renaming this function to make it less confusing. It might also be worth moving it into lops.c since there are no users outside that file. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*
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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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void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, int meta);
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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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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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