udf: Parameterize output length in udf_put_filename

Make the desired output length a parameter rather than have it
hard-coded to UDF_NAME_LEN. Although all call sites still have
this length the same, this parameterization will make the function
more universal and also consistent with udf_get_filename.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/namei.c

@@ -362,8 +362,9 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 			*err = -EINVAL;
 			goto out_err;
 		}
-		namelen = udf_put_filename(sb, dentry->d_name.name, name,
-						 dentry->d_name.len);
+		namelen = udf_put_filename(sb, dentry->d_name.name,
+					   dentry->d_name.len,
+					   name, UDF_NAME_LEN);
 		if (!namelen) {
 			*err = -ENAMETOOLONG;
 			goto out_err;
@@ -997,8 +998,9 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
 		}
 
 		if (pc->componentType == 5) {
-			namelen = udf_put_filename(sb, compstart, name,
-						   symname - compstart);
+			namelen = udf_put_filename(sb, compstart,
+						   symname - compstart,
+						   name, UDF_NAME_LEN);
 			if (!namelen)
 				goto out_no_entry;
 

fs/udf/udfdecl.h

@@ -216,8 +216,8 @@ udf_get_lb_pblock(struct super_block *sb, struct kernel_lb_addr *loc,
 /* unicode.c */
 extern int udf_get_filename(struct super_block *, uint8_t *, int, uint8_t *,
 			    int);
-extern int udf_put_filename(struct super_block *, const uint8_t *, uint8_t *,
-			    int);
+extern int udf_put_filename(struct super_block *, const uint8_t *, int,
+			    uint8_t *, int);
 extern int udf_build_ustr(struct ustr *, dstring *, int);
 extern int udf_CS0toUTF8(struct ustr *, const struct ustr *);
 

fs/udf/unicode.c

@@ -395,22 +395,22 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
 	return ret;
 }
 
-int udf_put_filename(struct super_block *sb, const uint8_t *sname,
-		     uint8_t *dname, int flen)
+int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
+		     uint8_t *dname, int dlen)
 {
 	struct ustr unifilename;
 	int namelen;
 
-	if (!udf_char_to_ustr(&unifilename, sname, flen))
+	if (!udf_char_to_ustr(&unifilename, sname, slen))
 		return 0;
 
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
-		namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN);
+		namelen = udf_UTF8toCS0(dname, &unifilename, dlen);
 		if (!namelen)
 			return 0;
 	} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
 		namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname,
-					&unifilename, UDF_NAME_LEN);
+					&unifilename, dlen);
 		if (!namelen)
 			return 0;
 	} else