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e63e88bc53
The header file "include/linux/nilfs2_fs.h" is composed of parts for ioctl and disk format, and both are intended to be shared with user space programs. This moves them to the uapi directory "include/uapi/linux" splitting the file to "nilfs2_api.h" and "nilfs2_ondisk.h". The following minor changes are accompanied by this migration: - nilfs_direct_node struct in nilfs2/direct.h is converged to nilfs2_ondisk.h because it's an on-disk structure. - inline functions nilfs_rec_len_from_disk() and nilfs_rec_len_to_disk() are moved to nilfs2/dir.c. Link: http://lkml.kernel.org/r/1465825507-3407-4-git-send-email-konishi.ryusuke@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>
142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
/*
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* sufile.h - NILFS segment usage file.
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*
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* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by Koji Sato.
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*/
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#ifndef _NILFS_SUFILE_H
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#define _NILFS_SUFILE_H
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#include <linux/fs.h>
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#include <linux/buffer_head.h>
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#include "mdt.h"
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static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile)
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{
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return ((struct the_nilfs *)sufile->i_sb->s_fs_info)->ns_nsegments;
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}
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unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile);
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int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end);
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int nilfs_sufile_alloc(struct inode *, __u64 *);
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int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
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int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
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unsigned long nblocks, time_t modtime);
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int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
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ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,
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size_t);
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ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t);
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int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *,
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void (*dofunc)(struct inode *, __u64,
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struct buffer_head *,
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struct buffer_head *));
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int nilfs_sufile_update(struct inode *, __u64, int,
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void (*dofunc)(struct inode *, __u64,
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struct buffer_head *,
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struct buffer_head *));
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void nilfs_sufile_do_scrap(struct inode *, __u64, struct buffer_head *,
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struct buffer_head *);
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void nilfs_sufile_do_free(struct inode *, __u64, struct buffer_head *,
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struct buffer_head *);
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void nilfs_sufile_do_cancel_free(struct inode *, __u64, struct buffer_head *,
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struct buffer_head *);
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void nilfs_sufile_do_set_error(struct inode *, __u64, struct buffer_head *,
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struct buffer_head *);
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int nilfs_sufile_resize(struct inode *sufile, __u64 newnsegs);
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int nilfs_sufile_read(struct super_block *sb, size_t susize,
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struct nilfs_inode *raw_inode, struct inode **inodep);
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int nilfs_sufile_trim_fs(struct inode *sufile, struct fstrim_range *range);
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/**
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* nilfs_sufile_scrap - make a segment garbage
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* @sufile: inode of segment usage file
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* @segnum: segment number to be freed
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*/
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static inline int nilfs_sufile_scrap(struct inode *sufile, __u64 segnum)
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{
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return nilfs_sufile_update(sufile, segnum, 1, nilfs_sufile_do_scrap);
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}
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/**
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* nilfs_sufile_free - free segment
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* @sufile: inode of segment usage file
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* @segnum: segment number to be freed
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*/
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static inline int nilfs_sufile_free(struct inode *sufile, __u64 segnum)
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{
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return nilfs_sufile_update(sufile, segnum, 0, nilfs_sufile_do_free);
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}
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/**
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* nilfs_sufile_freev - free segments
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* @sufile: inode of segment usage file
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* @segnumv: array of segment numbers
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* @nsegs: size of @segnumv array
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* @ndone: place to store the number of freed segments
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*/
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static inline int nilfs_sufile_freev(struct inode *sufile, __u64 *segnumv,
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size_t nsegs, size_t *ndone)
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{
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return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone,
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nilfs_sufile_do_free);
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}
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/**
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* nilfs_sufile_cancel_freev - reallocate freeing segments
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* @sufile: inode of segment usage file
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* @segnumv: array of segment numbers
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* @nsegs: size of @segnumv array
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* @ndone: place to store the number of cancelled segments
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*
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* Return Value: On success, 0 is returned. On error, a negative error codes
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* is returned.
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*/
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static inline int nilfs_sufile_cancel_freev(struct inode *sufile,
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__u64 *segnumv, size_t nsegs,
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size_t *ndone)
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{
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return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone,
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nilfs_sufile_do_cancel_free);
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}
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/**
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* nilfs_sufile_set_error - mark a segment as erroneous
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* @sufile: inode of segment usage file
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* @segnum: segment number
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*
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* Description: nilfs_sufile_set_error() marks the segment specified by
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* @segnum as erroneous. The error segment will never be used again.
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*
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* Return Value: On success, 0 is returned. On error, one of the following
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* negative error codes is returned.
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*
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* %-EIO - I/O error.
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*
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* %-ENOMEM - Insufficient amount of memory available.
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*
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* %-EINVAL - Invalid segment usage number.
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*/
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static inline int nilfs_sufile_set_error(struct inode *sufile, __u64 segnum)
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{
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return nilfs_sufile_update(sufile, segnum, 0,
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nilfs_sufile_do_set_error);
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}
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#endif /* _NILFS_SUFILE_H */
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