From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Fri, 24 Aug 2018 18:31:26 +0000 (-0700)
Subject: Add two assert statements in mark_random_map()
X-Git-Tag: fio-3.9~13^2~5
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=bd6b959a034cdcfcef010e56b139c609f56b83cf

Add two assert statements in mark_random_map()

Add two assert statements that verify whether mark_random_map() is
used correctly.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_u.c b/io_u.c
index eed7d9d9..9b5f203c 100644
--- a/io_u.c
+++ b/io_u.c
@@ -41,9 +41,12 @@ static uint64_t mark_random_map(struct thread_data *td, struct io_u *io_u,
 
 	block = (offset - f->file_offset) / (uint64_t) min_bs;
 	nr_blocks = (buflen + min_bs - 1) / min_bs;
+	assert(nr_blocks > 0);
 
-	if (!(io_u->flags & IO_U_F_BUSY_OK))
+	if (!(io_u->flags & IO_U_F_BUSY_OK)) {
 		nr_blocks = axmap_set_nr(f->io_axmap, block, nr_blocks);
+		assert(nr_blocks > 0);
+	}
 
 	if ((nr_blocks * min_bs) < buflen)
 		buflen = nr_blocks * min_bs;