Warn when user use sectorsize bigger than the page size, which will lead

to problems when the geli device is used with file system or as a swap.

Hopefully will prevent problems like kern/98742 in the future.

MFC after:	1 week

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/geom/eli/g_eli_ctl.c b/sys/geom/eli/g_eli_ctl.c
index e7f556b..7ae56b9 100644
--- a/sys/geom/eli/g_eli_ctl.c
+++ b/sys/geom/eli/g_eli_ctl.c
@@ -355,6 +355,10 @@ g_eli_ctl_onetime(struct gctl_req *req, struct g_class *mp)
 			gctl_error(req, "Invalid sector size.");
 			return;
 		}
+		if (*sectorsize > PAGE_SIZE) {
+			gctl_error(req, "warning: Using sectorsize bigger than "
+			    "the page size!");
+		}
 		md.md_sectorsize = *sectorsize;
 	}