From 6c98cd4ecb0ae35f0368c5c2190712689c2064aa Mon Sep 17 00:00:00 2001 From: Koji Sato Date: Mon, 6 Apr 2009 19:01:32 -0700 Subject: nilfs2: segment usage file 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 Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nilfs2/sufile.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 fs/nilfs2/sufile.h (limited to 'fs/nilfs2/sufile.h') diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h new file mode 100644 index 000000000000..d595f33a768d --- /dev/null +++ b/fs/nilfs2/sufile.h @@ -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 . + */ + +#ifndef _NILFS_SUFILE_H +#define _NILFS_SUFILE_H + +#include +#include +#include +#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 */ -- cgit v1.2.3