From: Pawel Baldysiak <pawel.baldysiak@intel.com>
Date: Thu, 28 Sep 2017 12:41:15 +0000 (+0200)
Subject: imsm: Write empty PPL header if assembling regular clean array.
X-Git-Tag: mdadm-4.1-rc1~67
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50b9c10da0e7c153744b548680147dc8cc7c4c72;p=thirdparty%2Fmdadm.git

imsm: Write empty PPL header if assembling regular clean array.

If array was initially assembled with kernel without PPL support -
initial header was never written to the drive.
If initial resync was completed and system is rebooted to kernel with
PPL support - mdadm prevents from assembling normal clean array
due to lack of valid PPL.
Write empty header when assemble normal clean array, so the
its assamble is no longer blocked.

Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---

diff --git a/super-intel.c b/super-intel.c
index 7b2327ba..501d0c3c 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -6225,7 +6225,9 @@ out:
 	}
 
 	if (ret == 1) {
-		if (map->map_state == IMSM_T_STATE_UNINITIALIZED)
+		if (map->map_state == IMSM_T_STATE_UNINITIALIZED ||
+		   (map->map_state == IMSM_T_STATE_NORMAL &&
+		   !(dev->vol.dirty & RAIDVOL_DIRTY)))
 			ret = st->ss->write_init_ppl(st, info, d->fd);
 		else
 			info->mismatch_cnt++;