f2fs: introduce read_inline_xattr

Commit ba38c27e ("f2fs: enhance lookup xattr") introduces
lookup_all_xattrs duplicating from read_all_xattrs, which leaves
lots of similar codes in between them, so introduce new help
read_inline_xattr to clean up redundant codes.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/xattr.c

@@ -241,6 +241,29 @@ static struct f2fs_xattr_entry *__find_inline_xattr(void *base_addr,
 	return entry;
 }
 
+static int read_inline_xattr(struct inode *inode, struct page *ipage,
+							void *txattr_addr)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	unsigned int inline_size = inline_xattr_size(inode);
+	struct page *page = NULL;
+	void *inline_addr;
+
+	if (ipage) {
+		inline_addr = inline_xattr_addr(ipage);
+	} else {
+		page = get_node_page(sbi, inode->i_ino);
+		if (IS_ERR(page))
+			return PTR_ERR(page);
+
+		inline_addr = inline_xattr_addr(page);
+	}
+	memcpy(txattr_addr, inline_addr, inline_size);
+	f2fs_put_page(page, 1);
+
+	return 0;
+}
+
 static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
 				unsigned int index, unsigned int len,
 				const char *name, struct f2fs_xattr_entry **xe,
@@ -263,21 +286,9 @@ static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
 
 	/* read from inline xattr */
 	if (inline_size) {
-		struct page *page = NULL;
-		void *inline_addr;
-
-		if (ipage) {
-			inline_addr = inline_xattr_addr(ipage);
-		} else {
-			page = get_node_page(sbi, inode->i_ino);
-			if (IS_ERR(page)) {
-				err = PTR_ERR(page);
-				goto out;
-			}
-			inline_addr = inline_xattr_addr(page);
-		}
-		memcpy(txattr_addr, inline_addr, inline_size);
-		f2fs_put_page(page, 1);
+		err = read_inline_xattr(inode, ipage, txattr_addr);
+		if (err)
+			goto out;
 
 		*xe = __find_inline_xattr(txattr_addr, &last_addr,
 						index, len, name);
@@ -339,21 +350,9 @@ static int read_all_xattrs(struct inode *inode, struct page *ipage,
 
 	/* read from inline xattr */
 	if (inline_size) {
-		struct page *page = NULL;
-		void *inline_addr;
-
-		if (ipage) {
-			inline_addr = inline_xattr_addr(ipage);
-		} else {
-			page = get_node_page(sbi, inode->i_ino);
-			if (IS_ERR(page)) {
-				err = PTR_ERR(page);
-				goto fail;
-			}
-			inline_addr = inline_xattr_addr(page);
-		}
-		memcpy(txattr_addr, inline_addr, inline_size);
-		f2fs_put_page(page, 1);
+		err = read_inline_xattr(inode, ipage, txattr_addr);
+		if (err)
+			goto fail;
 	}
 
 	/* read from xattr node block */