From e27fec66f0a94e35a35548bd0b29ae616e62ec62 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Mon, 31 Aug 2020 09:25:41 -0400
Subject: [PATCH] dm integrity: fix error reporting in bitmap mode after
 creation
Git-commit: e27fec66f0a94e35a35548bd0b29ae616e62ec62
Patch-mainline: v5.9-rc4
References: bsc#1175995, jsc#SLE-15608

The dm-integrity target did not report errors in bitmap mode just after
creation. The reason is that the function integrity_recalc didn't clean up
ic->recalc_bitmap as it proceeded with recalculation.

Fix this by updating the bitmap accordingly -- the double shift serves
to rounddown.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: 468dfca38b1a ("dm integrity: add a bitmap mode")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/dm-integrity.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 8c8d940e532e..3fc3757def55 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2487,6 +2487,7 @@ static void integrity_recalc(struct work_struct *w)
 	range.logical_sector = le64_to_cpu(ic->sb->recalc_sector);
 	if (unlikely(range.logical_sector >= ic->provided_data_sectors)) {
 		if (ic->mode == 'B') {
+			block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR);
 			DEBUG_print("queue_delayed_work: bitmap_flush_work\n");
 			queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0);
 		}
@@ -2564,6 +2565,17 @@ static void integrity_recalc(struct work_struct *w)
 		goto err;
 	}
 
+	if (ic->mode == 'B') {
+		sector_t start, end;
+		start = (range.logical_sector >>
+			 (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit)) <<
+			(ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit);
+		end = ((range.logical_sector + range.n_sectors) >>
+		       (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit)) <<
+			(ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit);
+		block_bitmap_op(ic, ic->recalc_bitmap, start, end - start, BITMAP_OP_CLEAR);
+	}
+
 advance_and_next:
 	cond_resched();
 
-- 
2.26.2