forked from luck/tmp_suning_uos_patched
fd88de569b
This adds readpages support (and also corrects a small bug in the readpage error path at the same time). Hopefully this will improve performance by allowing GFS to submit larger lumps of I/O at a time. In order to simplify the setting of BH_Boundary, it currently gets set when we hit the end of a indirect pointer block. There is always a boundary at this point with the current allocation code. It doesn't get all the boundaries right though, so there is still room for improvement in this. See comments in fs/gfs2/ops_address.c for further information about readpages with GFS2. Signed-off-by: Steven Whitehouse
33 lines
1.2 KiB
C
33 lines
1.2 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 __BMAP_DOT_H__
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#define __BMAP_DOT_H__
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typedef int (*gfs2_unstuffer_t) (struct gfs2_inode * ip,
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struct buffer_head * dibh, uint64_t block,
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void *private);
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int gfs2_unstuff_dinode(struct gfs2_inode *ip, gfs2_unstuffer_t unstuffer,
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void *private);
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int gfs2_block_map(struct inode *inode, u64 lblock, int *new, u64 *dblock, int *boundary);
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int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, u64 *dblock, unsigned *extlen);
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int gfs2_truncatei(struct gfs2_inode *ip, uint64_t size);
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int gfs2_truncatei_resume(struct gfs2_inode *ip);
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int gfs2_file_dealloc(struct gfs2_inode *ip);
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void gfs2_write_calc_reserv(struct gfs2_inode *ip, unsigned int len,
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unsigned int *data_blocks,
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unsigned int *ind_blocks);
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int gfs2_write_alloc_required(struct gfs2_inode *ip, uint64_t offset,
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unsigned int len, int *alloc_required);
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#endif /* __BMAP_DOT_H__ */
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