Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 921 deletions

diff --git a/ANDROID_3.4.5/fs/nilfs2/sufile.c b/ANDROID_3.4.5/fs/nilfs2/sufile.c
deleted file mode 100644
index c5b7653a..00000000
--- a/ANDROID_3.4.5/fs/nilfs2/sufile.c
+++ /dev/null
@@ -1,921 +0,0 @@
-/*
- * sufile.c - 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>.
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>.
- */
-
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/buffer_head.h>
-#include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
-#include "mdt.h"
-#include "sufile.h"
-
-
-struct nilfs_sufile_info {
-	struct nilfs_mdt_info mi;
-	unsigned long ncleansegs;/* number of clean segments */
-	__u64 allocmin;		/* lower limit of allocatable segment range */
-	__u64 allocmax;		/* upper limit of allocatable segment range */
-};
-
-static inline struct nilfs_sufile_info *NILFS_SUI(struct inode *sufile)
-{
-	return (struct nilfs_sufile_info *)NILFS_MDT(sufile);
-}
-
-static inline unsigned long
-nilfs_sufile_segment_usages_per_block(const struct inode *sufile)
-{
-	return NILFS_MDT(sufile)->mi_entries_per_block;
-}
-
-static unsigned long
-nilfs_sufile_get_blkoff(const struct inode *sufile, __u64 segnum)
-{
-	__u64 t = segnum + NILFS_MDT(sufile)->mi_first_entry_offset;
-	do_div(t, nilfs_sufile_segment_usages_per_block(sufile));
-	return (unsigned long)t;
-}
-
-static unsigned long
-nilfs_sufile_get_offset(const struct inode *sufile, __u64 segnum)
-{
-	__u64 t = segnum + NILFS_MDT(sufile)->mi_first_entry_offset;
-	return do_div(t, nilfs_sufile_segment_usages_per_block(sufile));
-}
-
-static unsigned long
-nilfs_sufile_segment_usages_in_block(const struct inode *sufile, __u64 curr,
-				     __u64 max)
-{
-	return min_t(unsigned long,
-		     nilfs_sufile_segment_usages_per_block(sufile) -
-		     nilfs_sufile_get_offset(sufile, curr),
-		     max - curr + 1);
-}
-
-static struct nilfs_segment_usage *
-nilfs_sufile_block_get_segment_usage(const struct inode *sufile, __u64 segnum,
-				     struct buffer_head *bh, void *kaddr)
-{
-	return kaddr + bh_offset(bh) +
-		nilfs_sufile_get_offset(sufile, segnum) *
-		NILFS_MDT(sufile)->mi_entry_size;
-}
-
-static inline int nilfs_sufile_get_header_block(struct inode *sufile,
-						struct buffer_head **bhp)
-{
-	return nilfs_mdt_get_block(sufile, 0, 0, NULL, bhp);
-}
-
-static inline int
-nilfs_sufile_get_segment_usage_block(struct inode *sufile, __u64 segnum,
-				     int create, struct buffer_head **bhp)
-{
-	return nilfs_mdt_get_block(sufile,
-				   nilfs_sufile_get_blkoff(sufile, segnum),
-				   create, NULL, bhp);
-}
-
-static int nilfs_sufile_delete_segment_usage_block(struct inode *sufile,
-						   __u64 segnum)
-{
-	return nilfs_mdt_delete_block(sufile,
-				      nilfs_sufile_get_blkoff(sufile, segnum));
-}
-
-static void nilfs_sufile_mod_counter(struct buffer_head *header_bh,
-				     u64 ncleanadd, u64 ndirtyadd)
-{
-	struct nilfs_sufile_header *header;
-	void *kaddr;
-
-	kaddr = kmap_atomic(header_bh->b_page);
-	header = kaddr + bh_offset(header_bh);
-	le64_add_cpu(&header->sh_ncleansegs, ncleanadd);
-	le64_add_cpu(&header->sh_ndirtysegs, ndirtyadd);
-	kunmap_atomic(kaddr);
-
-	mark_buffer_dirty(header_bh);
-}
-
-/**
- * nilfs_sufile_get_ncleansegs - return the number of clean segments
- * @sufile: inode of segment usage file
- */
-unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile)
-{
-	return NILFS_SUI(sufile)->ncleansegs;
-}
-
-/**
- * nilfs_sufile_updatev - modify multiple segment usages at a time
- * @sufile: inode of segment usage file
- * @segnumv: array of segment numbers
- * @nsegs: size of @segnumv array
- * @create: creation flag
- * @ndone: place to store number of modified segments on @segnumv
- * @dofunc: primitive operation for the update
- *
- * Description: nilfs_sufile_updatev() repeatedly calls @dofunc
- * against the given array of segments.  The @dofunc is called with
- * buffers of a header block and the sufile block in which the target
- * segment usage entry is contained.  If @ndone is given, the number
- * of successfully modified segments from the head is stored in the
- * place @ndone points to.
- *
- * Return Value: On success, zero is returned.  On error, one of the
- * following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-ENOENT - Given segment usage is in hole block (may be returned if
- *            @create is zero)
- *
- * %-EINVAL - Invalid segment usage number
- */
-int nilfs_sufile_updatev(struct inode *sufile, __u64 *segnumv, size_t nsegs,
-			 int create, size_t *ndone,
-			 void (*dofunc)(struct inode *, __u64,
-					struct buffer_head *,
-					struct buffer_head *))
-{
-	struct buffer_head *header_bh, *bh;
-	unsigned long blkoff, prev_blkoff;
-	__u64 *seg;
-	size_t nerr = 0, n = 0;
-	int ret = 0;
-
-	if (unlikely(nsegs == 0))
-		goto out;
-
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-	for (seg = segnumv; seg < segnumv + nsegs; seg++) {
-		if (unlikely(*seg >= nilfs_sufile_get_nsegments(sufile))) {
-			printk(KERN_WARNING
-			       "%s: invalid segment number: %llu\n", __func__,
-			       (unsigned long long)*seg);
-			nerr++;
-		}
-	}
-	if (nerr > 0) {
-		ret = -EINVAL;
-		goto out_sem;
-	}
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out_sem;
-
-	seg = segnumv;
-	blkoff = nilfs_sufile_get_blkoff(sufile, *seg);
-	ret = nilfs_mdt_get_block(sufile, blkoff, create, NULL, &bh);
-	if (ret < 0)
-		goto out_header;
-
-	for (;;) {
-		dofunc(sufile, *seg, header_bh, bh);
-
-		if (++seg >= segnumv + nsegs)
-			break;
-		prev_blkoff = blkoff;
-		blkoff = nilfs_sufile_get_blkoff(sufile, *seg);
-		if (blkoff == prev_blkoff)
-			continue;
-
-		/* get different block */
-		brelse(bh);
-		ret = nilfs_mdt_get_block(sufile, blkoff, create, NULL, &bh);
-		if (unlikely(ret < 0))
-			goto out_header;
-	}
-	brelse(bh);
-
- out_header:
-	n = seg - segnumv;
-	brelse(header_bh);
- out_sem:
-	up_write(&NILFS_MDT(sufile)->mi_sem);
- out:
-	if (ndone)
-		*ndone = n;
-	return ret;
-}
-
-int nilfs_sufile_update(struct inode *sufile, __u64 segnum, int create,
-			void (*dofunc)(struct inode *, __u64,
-				       struct buffer_head *,
-				       struct buffer_head *))
-{
-	struct buffer_head *header_bh, *bh;
-	int ret;
-
-	if (unlikely(segnum >= nilfs_sufile_get_nsegments(sufile))) {
-		printk(KERN_WARNING "%s: invalid segment number: %llu\n",
-		       __func__, (unsigned long long)segnum);
-		return -EINVAL;
-	}
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out_sem;
-
-	ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, create, &bh);
-	if (!ret) {
-		dofunc(sufile, segnum, header_bh, bh);
-		brelse(bh);
-	}
-	brelse(header_bh);
-
- out_sem:
-	up_write(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-/**
- * nilfs_sufile_set_alloc_range - limit range of segment to be allocated
- * @sufile: inode of segment usage file
- * @start: minimum segment number of allocatable region (inclusive)
- * @end: maximum segment number of allocatable region (inclusive)
- *
- * Return Value: On success, 0 is returned.  On error, one of the
- * following negative error codes is returned.
- *
- * %-ERANGE - invalid segment region
- */
-int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end)
-{
-	struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
-	__u64 nsegs;
-	int ret = -ERANGE;
-
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-	nsegs = nilfs_sufile_get_nsegments(sufile);
-
-	if (start <= end && end < nsegs) {
-		sui->allocmin = start;
-		sui->allocmax = end;
-		ret = 0;
-	}
-	up_write(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-/**
- * nilfs_sufile_alloc - allocate a segment
- * @sufile: inode of segment usage file
- * @segnump: pointer to segment number
- *
- * Description: nilfs_sufile_alloc() allocates a clean segment.
- *
- * Return Value: On success, 0 is returned and the segment number of the
- * allocated segment is stored in the place pointed by @segnump. On error, one
- * of the following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-ENOSPC - No clean segment left.
- */
-int nilfs_sufile_alloc(struct inode *sufile, __u64 *segnump)
-{
-	struct buffer_head *header_bh, *su_bh;
-	struct nilfs_sufile_header *header;
-	struct nilfs_segment_usage *su;
-	struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
-	size_t susz = NILFS_MDT(sufile)->mi_entry_size;
-	__u64 segnum, maxsegnum, last_alloc;
-	void *kaddr;
-	unsigned long nsegments, ncleansegs, nsus, cnt;
-	int ret, j;
-
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out_sem;
-	kaddr = kmap_atomic(header_bh->b_page);
-	header = kaddr + bh_offset(header_bh);
-	ncleansegs = le64_to_cpu(header->sh_ncleansegs);
-	last_alloc = le64_to_cpu(header->sh_last_alloc);
-	kunmap_atomic(kaddr);
-
-	nsegments = nilfs_sufile_get_nsegments(sufile);
-	maxsegnum = sui->allocmax;
-	segnum = last_alloc + 1;
-	if (segnum < sui->allocmin || segnum > sui->allocmax)
-		segnum = sui->allocmin;
-
-	for (cnt = 0; cnt < nsegments; cnt += nsus) {
-		if (segnum > maxsegnum) {
-			if (cnt < sui->allocmax - sui->allocmin + 1) {
-				/*
-				 * wrap around in the limited region.
-				 * if allocation started from
-				 * sui->allocmin, this never happens.
-				 */
-				segnum = sui->allocmin;
-				maxsegnum = last_alloc;
-			} else if (segnum > sui->allocmin &&
-				   sui->allocmax + 1 < nsegments) {
-				segnum = sui->allocmax + 1;
-				maxsegnum = nsegments - 1;
-			} else if (sui->allocmin > 0)  {
-				segnum = 0;
-				maxsegnum = sui->allocmin - 1;
-			} else {
-				break; /* never happens */
-			}
-		}
-		ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 1,
-							   &su_bh);
-		if (ret < 0)
-			goto out_header;
-		kaddr = kmap_atomic(su_bh->b_page);
-		su = nilfs_sufile_block_get_segment_usage(
-			sufile, segnum, su_bh, kaddr);
-
-		nsus = nilfs_sufile_segment_usages_in_block(
-			sufile, segnum, maxsegnum);
-		for (j = 0; j < nsus; j++, su = (void *)su + susz, segnum++) {
-			if (!nilfs_segment_usage_clean(su))
-				continue;
-			/* found a clean segment */
-			nilfs_segment_usage_set_dirty(su);
-			kunmap_atomic(kaddr);
-
-			kaddr = kmap_atomic(header_bh->b_page);
-			header = kaddr + bh_offset(header_bh);
-			le64_add_cpu(&header->sh_ncleansegs, -1);
-			le64_add_cpu(&header->sh_ndirtysegs, 1);
-			header->sh_last_alloc = cpu_to_le64(segnum);
-			kunmap_atomic(kaddr);
-
-			sui->ncleansegs--;
-			mark_buffer_dirty(header_bh);
-			mark_buffer_dirty(su_bh);
-			nilfs_mdt_mark_dirty(sufile);
-			brelse(su_bh);
-			*segnump = segnum;
-			goto out_header;
-		}
-
-		kunmap_atomic(kaddr);
-		brelse(su_bh);
-	}
-
-	/* no segments left */
-	ret = -ENOSPC;
-
- out_header:
-	brelse(header_bh);
-
- out_sem:
-	up_write(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-void nilfs_sufile_do_cancel_free(struct inode *sufile, __u64 segnum,
-				 struct buffer_head *header_bh,
-				 struct buffer_head *su_bh)
-{
-	struct nilfs_segment_usage *su;
-	void *kaddr;
-
-	kaddr = kmap_atomic(su_bh->b_page);
-	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, su_bh, kaddr);
-	if (unlikely(!nilfs_segment_usage_clean(su))) {
-		printk(KERN_WARNING "%s: segment %llu must be clean\n",
-		       __func__, (unsigned long long)segnum);
-		kunmap_atomic(kaddr);
-		return;
-	}
-	nilfs_segment_usage_set_dirty(su);
-	kunmap_atomic(kaddr);
-
-	nilfs_sufile_mod_counter(header_bh, -1, 1);
-	NILFS_SUI(sufile)->ncleansegs--;
-
-	mark_buffer_dirty(su_bh);
-	nilfs_mdt_mark_dirty(sufile);
-}
-
-void nilfs_sufile_do_scrap(struct inode *sufile, __u64 segnum,
-			   struct buffer_head *header_bh,
-			   struct buffer_head *su_bh)
-{
-	struct nilfs_segment_usage *su;
-	void *kaddr;
-	int clean, dirty;
-
-	kaddr = kmap_atomic(su_bh->b_page);
-	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, su_bh, kaddr);
-	if (su->su_flags == cpu_to_le32(1UL << NILFS_SEGMENT_USAGE_DIRTY) &&
-	    su->su_nblocks == cpu_to_le32(0)) {
-		kunmap_atomic(kaddr);
-		return;
-	}
-	clean = nilfs_segment_usage_clean(su);
-	dirty = nilfs_segment_usage_dirty(su);
-
-	/* make the segment garbage */
-	su->su_lastmod = cpu_to_le64(0);
-	su->su_nblocks = cpu_to_le32(0);
-	su->su_flags = cpu_to_le32(1UL << NILFS_SEGMENT_USAGE_DIRTY);
-	kunmap_atomic(kaddr);
-
-	nilfs_sufile_mod_counter(header_bh, clean ? (u64)-1 : 0, dirty ? 0 : 1);
-	NILFS_SUI(sufile)->ncleansegs -= clean;
-
-	mark_buffer_dirty(su_bh);
-	nilfs_mdt_mark_dirty(sufile);
-}
-
-void nilfs_sufile_do_free(struct inode *sufile, __u64 segnum,
-			  struct buffer_head *header_bh,
-			  struct buffer_head *su_bh)
-{
-	struct nilfs_segment_usage *su;
-	void *kaddr;
-	int sudirty;
-
-	kaddr = kmap_atomic(su_bh->b_page);
-	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, su_bh, kaddr);
-	if (nilfs_segment_usage_clean(su)) {
-		printk(KERN_WARNING "%s: segment %llu is already clean\n",
-		       __func__, (unsigned long long)segnum);
-		kunmap_atomic(kaddr);
-		return;
-	}
-	WARN_ON(nilfs_segment_usage_error(su));
-	WARN_ON(!nilfs_segment_usage_dirty(su));
-
-	sudirty = nilfs_segment_usage_dirty(su);
-	nilfs_segment_usage_set_clean(su);
-	kunmap_atomic(kaddr);
-	mark_buffer_dirty(su_bh);
-
-	nilfs_sufile_mod_counter(header_bh, 1, sudirty ? (u64)-1 : 0);
-	NILFS_SUI(sufile)->ncleansegs++;
-
-	nilfs_mdt_mark_dirty(sufile);
-}
-
-/**
- * nilfs_sufile_mark_dirty - mark the buffer having a segment usage dirty
- * @sufile: inode of segment usage file
- * @segnum: segment number
- */
-int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum)
-{
-	struct buffer_head *bh;
-	int ret;
-
-	ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
-	if (!ret) {
-		mark_buffer_dirty(bh);
-		nilfs_mdt_mark_dirty(sufile);
-		brelse(bh);
-	}
-	return ret;
-}
-
-/**
- * nilfs_sufile_set_segment_usage - set usage of a segment
- * @sufile: inode of segment usage file
- * @segnum: segment number
- * @nblocks: number of live blocks in the segment
- * @modtime: modification time (option)
- */
-int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
-				   unsigned long nblocks, time_t modtime)
-{
-	struct buffer_head *bh;
-	struct nilfs_segment_usage *su;
-	void *kaddr;
-	int ret;
-
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-	ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
-	if (ret < 0)
-		goto out_sem;
-
-	kaddr = kmap_atomic(bh->b_page);
-	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr);
-	WARN_ON(nilfs_segment_usage_error(su));
-	if (modtime)
-		su->su_lastmod = cpu_to_le64(modtime);
-	su->su_nblocks = cpu_to_le32(nblocks);
-	kunmap_atomic(kaddr);
-
-	mark_buffer_dirty(bh);
-	nilfs_mdt_mark_dirty(sufile);
-	brelse(bh);
-
- out_sem:
-	up_write(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-/**
- * nilfs_sufile_get_stat - get segment usage statistics
- * @sufile: inode of segment usage file
- * @stat: pointer to a structure of segment usage statistics
- *
- * Description: nilfs_sufile_get_stat() returns information about segment
- * usage.
- *
- * Return Value: On success, 0 is returned, and segment usage information is
- * stored in the place pointed by @stat. On error, one of the following
- * negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- */
-int nilfs_sufile_get_stat(struct inode *sufile, struct nilfs_sustat *sustat)
-{
-	struct buffer_head *header_bh;
-	struct nilfs_sufile_header *header;
-	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
-	void *kaddr;
-	int ret;
-
-	down_read(&NILFS_MDT(sufile)->mi_sem);
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out_sem;
-
-	kaddr = kmap_atomic(header_bh->b_page);
-	header = kaddr + bh_offset(header_bh);
-	sustat->ss_nsegs = nilfs_sufile_get_nsegments(sufile);
-	sustat->ss_ncleansegs = le64_to_cpu(header->sh_ncleansegs);
-	sustat->ss_ndirtysegs = le64_to_cpu(header->sh_ndirtysegs);
-	sustat->ss_ctime = nilfs->ns_ctime;
-	sustat->ss_nongc_ctime = nilfs->ns_nongc_ctime;
-	spin_lock(&nilfs->ns_last_segment_lock);
-	sustat->ss_prot_seq = nilfs->ns_prot_seq;
-	spin_unlock(&nilfs->ns_last_segment_lock);
-	kunmap_atomic(kaddr);
-	brelse(header_bh);
-
- out_sem:
-	up_read(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-void nilfs_sufile_do_set_error(struct inode *sufile, __u64 segnum,
-			       struct buffer_head *header_bh,
-			       struct buffer_head *su_bh)
-{
-	struct nilfs_segment_usage *su;
-	void *kaddr;
-	int suclean;
-
-	kaddr = kmap_atomic(su_bh->b_page);
-	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, su_bh, kaddr);
-	if (nilfs_segment_usage_error(su)) {
-		kunmap_atomic(kaddr);
-		return;
-	}
-	suclean = nilfs_segment_usage_clean(su);
-	nilfs_segment_usage_set_error(su);
-	kunmap_atomic(kaddr);
-
-	if (suclean) {
-		nilfs_sufile_mod_counter(header_bh, -1, 0);
-		NILFS_SUI(sufile)->ncleansegs--;
-	}
-	mark_buffer_dirty(su_bh);
-	nilfs_mdt_mark_dirty(sufile);
-}
-
-/**
-  * nilfs_sufile_truncate_range - truncate range of segment array
-  * @sufile: inode of segment usage file
-  * @start: start segment number (inclusive)
-  * @end: end segment number (inclusive)
-  *
-  * Return Value: On success, 0 is returned.  On error, one of the
-  * following negative error codes is returned.
-  *
-  * %-EIO - I/O error.
-  *
-  * %-ENOMEM - Insufficient amount of memory available.
-  *
-  * %-EINVAL - Invalid number of segments specified
-  *
-  * %-EBUSY - Dirty or active segments are present in the range
-  */
-static int nilfs_sufile_truncate_range(struct inode *sufile,
-				       __u64 start, __u64 end)
-{
-	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
-	struct buffer_head *header_bh;
-	struct buffer_head *su_bh;
-	struct nilfs_segment_usage *su, *su2;
-	size_t susz = NILFS_MDT(sufile)->mi_entry_size;
-	unsigned long segusages_per_block;
-	unsigned long nsegs, ncleaned;
-	__u64 segnum;
-	void *kaddr;
-	ssize_t n, nc;
-	int ret;
-	int j;
-
-	nsegs = nilfs_sufile_get_nsegments(sufile);
-
-	ret = -EINVAL;
-	if (start > end || start >= nsegs)
-		goto out;
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out;
-
-	segusages_per_block = nilfs_sufile_segment_usages_per_block(sufile);
-	ncleaned = 0;
-
-	for (segnum = start; segnum <= end; segnum += n) {
-		n = min_t(unsigned long,
-			  segusages_per_block -
-				  nilfs_sufile_get_offset(sufile, segnum),
-			  end - segnum + 1);
-		ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0,
-							   &su_bh);
-		if (ret < 0) {
-			if (ret != -ENOENT)
-				goto out_header;
-			/* hole */
-			continue;
-		}
-		kaddr = kmap_atomic(su_bh->b_page);
-		su = nilfs_sufile_block_get_segment_usage(
-			sufile, segnum, su_bh, kaddr);
-		su2 = su;
-		for (j = 0; j < n; j++, su = (void *)su + susz) {
-			if ((le32_to_cpu(su->su_flags) &
-			     ~(1UL << NILFS_SEGMENT_USAGE_ERROR)) ||
-			    nilfs_segment_is_active(nilfs, segnum + j)) {
-				ret = -EBUSY;
-				kunmap_atomic(kaddr);
-				brelse(su_bh);
-				goto out_header;
-			}
-		}
-		nc = 0;
-		for (su = su2, j = 0; j < n; j++, su = (void *)su + susz) {
-			if (nilfs_segment_usage_error(su)) {
-				nilfs_segment_usage_set_clean(su);
-				nc++;
-			}
-		}
-		kunmap_atomic(kaddr);
-		if (nc > 0) {
-			mark_buffer_dirty(su_bh);
-			ncleaned += nc;
-		}
-		brelse(su_bh);
-
-		if (n == segusages_per_block) {
-			/* make hole */
-			nilfs_sufile_delete_segment_usage_block(sufile, segnum);
-		}
-	}
-	ret = 0;
-
-out_header:
-	if (ncleaned > 0) {
-		NILFS_SUI(sufile)->ncleansegs += ncleaned;
-		nilfs_sufile_mod_counter(header_bh, ncleaned, 0);
-		nilfs_mdt_mark_dirty(sufile);
-	}
-	brelse(header_bh);
-out:
-	return ret;
-}
-
-/**
- * nilfs_sufile_resize - resize segment array
- * @sufile: inode of segment usage file
- * @newnsegs: new number of segments
- *
- * Return Value: On success, 0 is returned.  On error, one of the
- * following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-ENOSPC - Enough free space is not left for shrinking
- *
- * %-EBUSY - Dirty or active segments exist in the region to be truncated
- */
-int nilfs_sufile_resize(struct inode *sufile, __u64 newnsegs)
-{
-	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
-	struct buffer_head *header_bh;
-	struct nilfs_sufile_header *header;
-	struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
-	void *kaddr;
-	unsigned long nsegs, nrsvsegs;
-	int ret = 0;
-
-	down_write(&NILFS_MDT(sufile)->mi_sem);
-
-	nsegs = nilfs_sufile_get_nsegments(sufile);
-	if (nsegs == newnsegs)
-		goto out;
-
-	ret = -ENOSPC;
-	nrsvsegs = nilfs_nrsvsegs(nilfs, newnsegs);
-	if (newnsegs < nsegs && nsegs - newnsegs + nrsvsegs > sui->ncleansegs)
-		goto out;
-
-	ret = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (ret < 0)
-		goto out;
-
-	if (newnsegs > nsegs) {
-		sui->ncleansegs += newnsegs - nsegs;
-	} else /* newnsegs < nsegs */ {
-		ret = nilfs_sufile_truncate_range(sufile, newnsegs, nsegs - 1);
-		if (ret < 0)
-			goto out_header;
-
-		sui->ncleansegs -= nsegs - newnsegs;
-	}
-
-	kaddr = kmap_atomic(header_bh->b_page);
-	header = kaddr + bh_offset(header_bh);
-	header->sh_ncleansegs = cpu_to_le64(sui->ncleansegs);
-	kunmap_atomic(kaddr);
-
-	mark_buffer_dirty(header_bh);
-	nilfs_mdt_mark_dirty(sufile);
-	nilfs_set_nsegments(nilfs, newnsegs);
-
-out_header:
-	brelse(header_bh);
-out:
-	up_write(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-/**
- * nilfs_sufile_get_suinfo -
- * @sufile: inode of segment usage file
- * @segnum: segment number to start looking
- * @buf: array of suinfo
- * @sisz: byte size of suinfo
- * @nsi: size of suinfo array
- *
- * Description:
- *
- * Return Value: On success, 0 is returned and .... On error, one of the
- * following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- */
-ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
-				unsigned sisz, size_t nsi)
-{
-	struct buffer_head *su_bh;
-	struct nilfs_segment_usage *su;
-	struct nilfs_suinfo *si = buf;
-	size_t susz = NILFS_MDT(sufile)->mi_entry_size;
-	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
-	void *kaddr;
-	unsigned long nsegs, segusages_per_block;
-	ssize_t n;
-	int ret, i, j;
-
-	down_read(&NILFS_MDT(sufile)->mi_sem);
-
-	segusages_per_block = nilfs_sufile_segment_usages_per_block(sufile);
-	nsegs = min_t(unsigned long,
-		      nilfs_sufile_get_nsegments(sufile) - segnum,
-		      nsi);
-	for (i = 0; i < nsegs; i += n, segnum += n) {
-		n = min_t(unsigned long,
-			  segusages_per_block -
-				  nilfs_sufile_get_offset(sufile, segnum),
-			  nsegs - i);
-		ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0,
-							   &su_bh);
-		if (ret < 0) {
-			if (ret != -ENOENT)
-				goto out;
-			/* hole */
-			memset(si, 0, sisz * n);
-			si = (void *)si + sisz * n;
-			continue;
-		}
-
-		kaddr = kmap_atomic(su_bh->b_page);
-		su = nilfs_sufile_block_get_segment_usage(
-			sufile, segnum, su_bh, kaddr);
-		for (j = 0; j < n;
-		     j++, su = (void *)su + susz, si = (void *)si + sisz) {
-			si->sui_lastmod = le64_to_cpu(su->su_lastmod);
-			si->sui_nblocks = le32_to_cpu(su->su_nblocks);
-			si->sui_flags = le32_to_cpu(su->su_flags) &
-				~(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
-			if (nilfs_segment_is_active(nilfs, segnum + j))
-				si->sui_flags |=
-					(1UL << NILFS_SEGMENT_USAGE_ACTIVE);
-		}
-		kunmap_atomic(kaddr);
-		brelse(su_bh);
-	}
-	ret = nsegs;
-
- out:
-	up_read(&NILFS_MDT(sufile)->mi_sem);
-	return ret;
-}
-
-/**
- * nilfs_sufile_read - read or get sufile inode
- * @sb: super block instance
- * @susize: size of a segment usage entry
- * @raw_inode: on-disk sufile inode
- * @inodep: buffer to store the inode
- */
-int nilfs_sufile_read(struct super_block *sb, size_t susize,
-		      struct nilfs_inode *raw_inode, struct inode **inodep)
-{
-	struct inode *sufile;
-	struct nilfs_sufile_info *sui;
-	struct buffer_head *header_bh;
-	struct nilfs_sufile_header *header;
-	void *kaddr;
-	int err;
-
-	sufile = nilfs_iget_locked(sb, NULL, NILFS_SUFILE_INO);
-	if (unlikely(!sufile))
-		return -ENOMEM;
-	if (!(sufile->i_state & I_NEW))
-		goto out;
-
-	err = nilfs_mdt_init(sufile, NILFS_MDT_GFP, sizeof(*sui));
-	if (err)
-		goto failed;
-
-	nilfs_mdt_set_entry_size(sufile, susize,
-				 sizeof(struct nilfs_sufile_header));
-
-	err = nilfs_read_inode_common(sufile, raw_inode);
-	if (err)
-		goto failed;
-
-	err = nilfs_sufile_get_header_block(sufile, &header_bh);
-	if (err)
-		goto failed;
-
-	sui = NILFS_SUI(sufile);
-	kaddr = kmap_atomic(header_bh->b_page);
-	header = kaddr + bh_offset(header_bh);
-	sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
-	kunmap_atomic(kaddr);
-	brelse(header_bh);
-
-	sui->allocmax = nilfs_sufile_get_nsegments(sufile) - 1;
-	sui->allocmin = 0;
-
-	unlock_new_inode(sufile);
- out:
-	*inodep = sufile;
-	return 0;
- failed:
-	iget_failed(sufile);
-	return err;
-}