forked from luck/tmp_suning_uos_patched
3921120e75
This patch adds support for fallocate to gfs2. Since the gfs2 does not support uninitialized data blocks, it must write out zeros to all the blocks. However, since it does not need to lock any pages to read from, gfs2 can write out the zero blocks much more efficiently. On a moderately full filesystem, fallocate works around 5 times faster on average. The fallocate call also allows gfs2 to add blocks to the file without changing the filesize, which will make it possible for gfs2 to preallocate space for the rindex file, so that gfs2 can grow a completely full filesystem. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 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 version 2.
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*/
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#ifndef __TRANS_DOT_H__
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#define __TRANS_DOT_H__
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#include <linux/buffer_head.h>
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struct gfs2_sbd;
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struct gfs2_rgrpd;
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struct gfs2_glock;
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#define RES_DINODE 1
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#define RES_INDIRECT 1
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#define RES_JDATA 1
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#define RES_DATA 1
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#define RES_LEAF 1
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#define RES_RG_HDR 1
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#define RES_RG_BIT 2
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#define RES_EATTR 1
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#define RES_STATFS 1
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#define RES_QUOTA 2
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int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
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unsigned int revokes);
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void gfs2_trans_end(struct gfs2_sbd *sdp);
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void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta);
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void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
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void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
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void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd);
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#endif /* __TRANS_DOT_H__ */
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