From: Xiao Ni <xni@redhat.com>
Date: Fri, 18 Oct 2024 08:48:17 +0000 (+0800)
Subject: mdadm/Grow: Check new_level interface rather than kernel version
X-Git-Tag: mdadm-4.4~46
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=b278b2fc172bb8d50f607adef4d515af1f52d913;p=thirdparty%2Fmdadm.git

mdadm/Grow: Check new_level interface rather than kernel version

Different os distributions have different kernel version themselves.
Check new_level sysfs interface rather than kernel version.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---

diff --git a/Grow.c b/Grow.c
index ef1285ec..9032c3e9 100644
--- a/Grow.c
+++ b/Grow.c
@@ -2952,7 +2952,7 @@ static int impose_reshape(struct mdinfo *sra,
 			err = errno;
 
 		/* new_level is introduced in kernel 6.12 */
-		if (!err && get_linux_version() >= 6012000 &&
+		if (!err && sysfs_attribute_available(sra, NULL, "new_level") &&
 				sysfs_set_num(sra, NULL, "new_level", info->new_level) < 0)
 			err = errno;