f2fs: add the truncate_xattr_node function

The truncate_xattr_node function will be used by inline xattr.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0343759..0fe9302 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1016,6 +1016,7 @@ int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
 int truncate_inode_blocks(struct inode *, pgoff_t);
+int truncate_xattr_node(struct inode *, struct page *);
 int remove_inode_page(struct inode *);
 struct page *new_inode_page(struct inode *, const struct qstr *);
 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index f0e733b..2a464a7 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -772,6 +772,29 @@ fail:
        return err > 0 ? 0 : err;
 }
 
+int truncate_xattr_node(struct inode *inode, struct page *page)
+{
+       struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+       nid_t nid = F2FS_I(inode)->i_xattr_nid;
+       struct dnode_of_data dn;
+       struct page *npage;
+
+       if (!nid)
+               return 0;
+
+       npage = get_node_page(sbi, nid);
+       if (IS_ERR(npage))
+               return PTR_ERR(npage);
+
+       F2FS_I(inode)->i_xattr_nid = 0;
+       set_new_dnode(&dn, inode, page, npage, nid);
+
+       if (page)
+               dn.inode_page_locked = 1;
+       truncate_node(&dn);
+       return 0;
+}
+
 /*
  * Caller should grab and release a mutex by calling mutex_lock_op() and
  * mutex_unlock_op().
@@ -782,22 +805,16 @@ int remove_inode_page(struct inode *inode)
        struct page *page;
        nid_t ino = inode->i_ino;
        struct dnode_of_data dn;
+       int err;
 
        page = get_node_page(sbi, ino);
        if (IS_ERR(page))
                return PTR_ERR(page);
 
-       if (F2FS_I(inode)->i_xattr_nid) {
-               nid_t nid = F2FS_I(inode)->i_xattr_nid;
-               struct page *npage = get_node_page(sbi, nid);
-
-               if (IS_ERR(npage))
-                       return PTR_ERR(npage);
-
-               F2FS_I(inode)->i_xattr_nid = 0;
-               set_new_dnode(&dn, inode, page, npage, nid);
-               dn.inode_page_locked = 1;
-               truncate_node(&dn);
+       err = truncate_xattr_node(inode, page);
+       if (err) {
+               f2fs_put_page(page, 1);
+               return err;
        }
 
        /* 0 is possible, after f2fs_new_inode() is failed */