Illumos #2619 and #2747

[zfs.git] / lib / libzpool / kernel.c

diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index c38efd0..0e10c89 100644 (file)
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -647,7 +647,9 @@ vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset,
                 * To simulate partial disk writes, we split writes into two
                 * system calls so that the process can be killed in between.
                 */
-               split = (len > 0 ? rand() % len : 0);
+               int sectors = len >> SPA_MINBLOCKSHIFT;
+               split = (sectors > 0 ? rand() % sectors : 0) <<
+                   SPA_MINBLOCKSHIFT;
                rc = pwrite64(vp->v_fd, addr, split, offset);
                if (rc != -1) {
                        done = rc;