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nilfs2: segment usage file

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This adds a meta data file which stores the allocation state of segments.

[konishi.ryusuke@lab.ntt.co.jp: fix wrong counting of checkpoints and dirty segments]
Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Koji Sato
2009-04-06 19:01:32 -07:00
committed by Linus Torvalds
parent 2961980972
commit 6c98cd4ecb
3 changed files with 682 additions and 1 deletions
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fs/nilfs2/cpfile.c
+1 -1
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@@ -357,7 +357,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
header = nilfs_cpfile_block_get_header(cpfile, header_bh,
kaddr);
le64_add_cpu(&header->ch_ncheckpoints, -tnicps);
le64_add_cpu(&header->ch_ncheckpoints, -(u64)tnicps);
nilfs_mdt_mark_buffer_dirty(header_bh);
nilfs_mdt_mark_dirty(cpfile);
kunmap_atomic(kaddr, KM_USER0);
fs/nilfs2/sufile.c
+627
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File diff suppressed because it is too large Load Diff
fs/nilfs2/sufile.h
+54
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@@ -0,0 +1,54 @@
/*
* sufile.h - NILFS segment usage file.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Written by Koji Sato <koji@osrg.net>.
*/
#ifndef _NILFS_SUFILE_H
#define _NILFS_SUFILE_H
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/nilfs2_fs.h>
#include "mdt.h"
#define NILFS_SUFILE_GFP NILFS_MDT_GFP
static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile)
{
return NILFS_MDT(sufile)->mi_nilfs->ns_nsegments;
}
int nilfs_sufile_alloc(struct inode *, __u64 *);
int nilfs_sufile_cancel_free(struct inode *, __u64);
int nilfs_sufile_freev(struct inode *, __u64 *, size_t);
int nilfs_sufile_free(struct inode *, __u64);
int nilfs_sufile_get_segment_usage(struct inode *, __u64,
struct nilfs_segment_usage **,
struct buffer_head **);
void nilfs_sufile_put_segment_usage(struct inode *, __u64,
struct buffer_head *);
int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
int nilfs_sufile_get_ncleansegs(struct inode *, unsigned long *);
int nilfs_sufile_set_error(struct inode *, __u64);
ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, struct nilfs_suinfo *,
size_t);
#endif /* _NILFS_SUFILE_H */