nilfs2: remove header file for segment list operations

This will eliminate obsolete list operations of nilfs_segment_entry
structure which has been used to handle mutiple segment numbers.

The patch ("nilfs2: remove list of freeing segments") removed use of
the structure from the segment constructor code, and this patch
simplifies the remaining code by integrating it into recovery.c.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

4 files changed, 25 insertions, 93 deletions

diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index 57afa9d24061..d80cc71be749 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -28,7 +28,6 @@
 #include "segment.h"
 #include "sufile.h"
 #include "page.h"
-#include "seglist.h"
 #include "segbuf.h"
 
 /*
@@ -395,6 +394,24 @@ static void dispose_recovery_list(struct list_head *head)
         }
 }
 
+struct nilfs_segment_entry {
+        struct list_head        list;
+        __u64                   segnum;
+};
+
+static int nilfs_segment_list_add(struct list_head *head, __u64 segnum)
+{
+        struct nilfs_segment_entry *ent = kmalloc(sizeof(*ent), GFP_NOFS);
+
+        if (unlikely(!ent))
+                return -ENOMEM;
+
+        ent->segnum = segnum;
+        INIT_LIST_HEAD(&ent->list);
+        list_add_tail(&ent->list, head);
+        return 0;
+}
+
 void nilfs_dispose_segment_list(struct list_head *head)
 {
         while (!list_empty(head)) {
@@ -402,7 +419,7 @@ void nilfs_dispose_segment_list(struct list_head *head)
                         = list_entry(head->next,
                                      struct nilfs_segment_entry, list);
                 list_del(&ent->list);
-                nilfs_free_segment_entry(ent);
+                kfree(ent);
         }
 }
 
@@ -431,12 +448,10 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
         if (unlikely(err))
                 goto failed;
 
-        err = -ENOMEM;
         for (i = 1; i < 4; i++) {
-                ent = nilfs_alloc_segment_entry(segnum[i]);
-                if (unlikely(!ent))
+                err = nilfs_segment_list_add(head, segnum[i]);
+                if (unlikely(err))
                         goto failed;
-                list_add_tail(&ent->list, head);
         }
 
         /*
@@ -450,7 +465,7 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
                                 goto failed;
                 }
                 list_del(&ent->list);
-                nilfs_free_segment_entry(ent);
+                kfree(ent);
         }
 
         /* Allocate new segments for recovery */
@@ -791,7 +806,6 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
         u64 seg_seq;
         __u64 segnum, nextnum = 0;
         __u64 cno;
-        struct nilfs_segment_entry *ent;
         LIST_HEAD(segments);
         int empty_seg = 0, scan_newer = 0;
         int ret;
@@ -892,12 +906,9 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
                 if (empty_seg++)
                         goto super_root_found; /* found a valid super root */
 
-                ent = nilfs_alloc_segment_entry(segnum);
-                if (unlikely(!ent)) {
-                        ret = -ENOMEM;
+                ret = nilfs_segment_list_add(&segments, segnum);
+                if (unlikely(ret))
                         goto failed;
-                }
-                list_add_tail(&ent->list, &segments);
 
                 seg_seq++;
                 segnum = nextnum;
diff --git a/fs/nilfs2/seglist.h b/fs/nilfs2/seglist.h
deleted file mode 100644
index e448e40c1ecb..000000000000
--- a/fs/nilfs2/seglist.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * seglist.h - expediential structure and routines to handle list of segments
- *             (would be removed in a future release)
- *
- * Copyright (C) 2005-2008 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 Ryusuke Konishi <ryusuke@osrg.net>
- *
- */
-#ifndef _NILFS_SEGLIST_H
-#define _NILFS_SEGLIST_H
-
-#include <linux/fs.h>
-#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
-#include "sufile.h"
-
-struct nilfs_segment_entry {
-        __u64                   segnum;
-
-        struct list_head        list;
-        struct buffer_head     *bh_su;
-        struct nilfs_segment_usage *raw_su;
-};
-
-
-void nilfs_dispose_segment_list(struct list_head *);
-
-static inline struct nilfs_segment_entry *
-nilfs_alloc_segment_entry(__u64 segnum)
-{
-        struct nilfs_segment_entry *ent = kmalloc(sizeof(*ent), GFP_NOFS);
-
-        if (likely(ent)) {
-                ent->segnum = segnum;
-                ent->bh_su = NULL;
-                ent->raw_su = NULL;
-                INIT_LIST_HEAD(&ent->list);
-        }
-        return ent;
-}
-
-static inline int nilfs_open_segment_entry(struct nilfs_segment_entry *ent,
-                                           struct inode *sufile)
-{
-        return nilfs_sufile_get_segment_usage(sufile, ent->segnum,
-                                              &ent->raw_su, &ent->bh_su);
-}
-
-static inline void nilfs_close_segment_entry(struct nilfs_segment_entry *ent,
-                                             struct inode *sufile)
-{
-        if (!ent->bh_su)
-                return;
-        nilfs_sufile_put_segment_usage(sufile, ent->segnum, ent->bh_su);
-        ent->bh_su = NULL;
-        ent->raw_su = NULL;
-}
-
-static inline void nilfs_free_segment_entry(struct nilfs_segment_entry *ent)
-{
-        kfree(ent);
-}
-
-#endif /* _NILFS_SEGLIST_H */
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index f36a851738e4..0d2a475a741b 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -239,5 +239,6 @@ extern int nilfs_search_super_root(struct the_nilfs *, struct nilfs_sb_info *,
 extern int nilfs_recover_logical_segments(struct the_nilfs *,
                                           struct nilfs_sb_info *,
                                           struct nilfs_recovery_info *);
+extern void nilfs_dispose_segment_list(struct list_head *);
 
 #endif /* _NILFS_SEGMENT_H */
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 7f65b3be4aa9..dfe2e320276e 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -32,7 +32,6 @@
 #include "cpfile.h"
 #include "sufile.h"
 #include "dat.h"
-#include "seglist.h"
 #include "segbuf.h"
 
 void nilfs_set_last_segment(struct the_nilfs *nilfs,