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>
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@ -1016,6 +1016,7 @@ int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
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void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
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int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
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int truncate_inode_blocks(struct inode *, pgoff_t);
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int truncate_xattr_node(struct inode *, struct page *);
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int remove_inode_page(struct inode *);
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struct page *new_inode_page(struct inode *, const struct qstr *);
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struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
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@ -772,6 +772,29 @@ fail:
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return err > 0 ? 0 : err;
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}
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int truncate_xattr_node(struct inode *inode, struct page *page)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
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nid_t nid = F2FS_I(inode)->i_xattr_nid;
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struct dnode_of_data dn;
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struct page *npage;
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if (!nid)
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return 0;
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npage = get_node_page(sbi, nid);
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if (IS_ERR(npage))
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return PTR_ERR(npage);
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F2FS_I(inode)->i_xattr_nid = 0;
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set_new_dnode(&dn, inode, page, npage, nid);
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if (page)
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dn.inode_page_locked = 1;
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truncate_node(&dn);
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return 0;
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}
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/*
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* Caller should grab and release a mutex by calling mutex_lock_op() and
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* mutex_unlock_op().
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@ -782,22 +805,16 @@ int remove_inode_page(struct inode *inode)
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struct page *page;
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nid_t ino = inode->i_ino;
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struct dnode_of_data dn;
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int err;
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page = get_node_page(sbi, ino);
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if (IS_ERR(page))
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return PTR_ERR(page);
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if (F2FS_I(inode)->i_xattr_nid) {
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nid_t nid = F2FS_I(inode)->i_xattr_nid;
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struct page *npage = get_node_page(sbi, nid);
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if (IS_ERR(npage))
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return PTR_ERR(npage);
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F2FS_I(inode)->i_xattr_nid = 0;
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set_new_dnode(&dn, inode, page, npage, nid);
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dn.inode_page_locked = 1;
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truncate_node(&dn);
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err = truncate_xattr_node(inode, page);
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if (err) {
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f2fs_put_page(page, 1);
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return err;
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}
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/* 0 is possible, after f2fs_new_inode() is failed */
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