f2fs: punch the core function for inode management

This patch punches out the core functions to manage the inode numbers.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 0b4710c..1c6eb6b 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -282,6 +282,47 @@ const struct address_space_operations f2fs_meta_aops = {
        .set_page_dirty = f2fs_set_meta_page_dirty,
 };
 
+static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino)
+{
+       struct list_head *head;
+       struct orphan_inode_entry *new, *e;
+
+       new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
+       new->ino = ino;
+
+       spin_lock(&sbi->orphan_inode_lock);
+       list_for_each_entry(e, &sbi->orphan_inode_list, list) {
+               if (e->ino == ino) {
+                       spin_unlock(&sbi->orphan_inode_lock);
+                       kmem_cache_free(orphan_entry_slab, new);
+                       return;
+               }
+               if (e->ino > ino)
+                       break;
+       }
+
+       /* add new entry into list which is sorted by inode number */
+       list_add_tail(&new->list, &e->list);
+       spin_unlock(&sbi->orphan_inode_lock);
+}
+
+static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino)
+{
+       struct orphan_inode_entry *e;
+
+       spin_lock(&sbi->orphan_inode_lock);
+       list_for_each_entry(e, &sbi->orphan_inode_list, list) {
+               if (e->ino == ino) {
+                       list_del(&e->list);
+                       sbi->n_orphans--;
+                       spin_unlock(&sbi->orphan_inode_lock);
+                       kmem_cache_free(orphan_entry_slab, e);
+                       return;
+               }
+       }
+       spin_unlock(&sbi->orphan_inode_lock);
+}
+
 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
 {
        int err = 0;
@@ -306,48 +347,14 @@ void release_orphan_inode(struct f2fs_sb_info *sbi)
 
 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 {
-       struct list_head *head;
-       struct orphan_inode_entry *new, *orphan;
-
-       new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
-       new->ino = ino;
-
-       spin_lock(&sbi->orphan_inode_lock);
-       head = &sbi->orphan_inode_list;
-       list_for_each_entry(orphan, head, list) {
-               if (orphan->ino == ino) {
-                       spin_unlock(&sbi->orphan_inode_lock);
-                       kmem_cache_free(orphan_entry_slab, new);
-                       return;
-               }
-
-               if (orphan->ino > ino)
-                       break;
-       }
-
        /* add new orphan entry into list which is sorted by inode number */
-       list_add_tail(&new->list, &orphan->list);
-       spin_unlock(&sbi->orphan_inode_lock);
+       __add_ino_entry(sbi, ino);
 }
 
 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 {
-       struct list_head *head;
-       struct orphan_inode_entry *orphan;
-
-       spin_lock(&sbi->orphan_inode_lock);
-       head = &sbi->orphan_inode_list;
-       list_for_each_entry(orphan, head, list) {
-               if (orphan->ino == ino) {
-                       list_del(&orphan->list);
-                       f2fs_bug_on(sbi->n_orphans == 0);
-                       sbi->n_orphans--;
-                       spin_unlock(&sbi->orphan_inode_lock);
-                       kmem_cache_free(orphan_entry_slab, orphan);
-                       return;
-               }
-       }
-       spin_unlock(&sbi->orphan_inode_lock);
+       /* remove orphan entry from orphan list */
+       __remove_ino_entry(sbi, ino);
 }
 
 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)