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/sbin/geom/class/eli/geom_eli.c b/sbin/geom/class/eli/geom_eli.c
index ed13555..3bf4fdc 100644
--- a/sbin/geom/class/eli/geom_eli.c
+++ b/sbin/geom/class/eli/geom_eli.c
@@ -609,6 +609,10 @@ eli_init(struct gctl_req *req)
 			gctl_error(req, "Invalid sector size.");
 			return;
 		}
+		if (val > sysconf(_SC_PAGE_SIZE)) {
+			gctl_error(req, "warning: Using sectorsize bigger than "
+			    "the page size!");
+		}
 		md.md_sectorsize = val;
 	}