From: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Date: Fri, 29 Sep 2017 20:54:19 +0000 (+0200)
Subject: raid5-ppl: check recovery_offset when performing ppl recovery
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=07719ff767dcd8cc42050f185d332052f3816546;p=linux.git

raid5-ppl: check recovery_offset when performing ppl recovery

If starting an array that is undergoing rebuild, make ppl recovery honor
the recovery_offset of a member disk and don't read data that is not yet
in-sync.

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
---

diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index 76d6245427b88..628c0bf7b9fde 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -758,7 +758,8 @@ static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e,
 				 (unsigned long long)sector);
 
 			rdev = conf->disks[dd_idx].rdev;
-			if (!rdev) {
+			if (!rdev || (!test_bit(In_sync, &rdev->flags) &&
+				      sector >= rdev->recovery_offset)) {
 				pr_debug("%s:%*s data member disk %d missing\n",
 					 __func__, indent, "", dd_idx);
 				update_parity = false;