From: Alex Hornung <ahornung@gmail.com>
Date: Mon, 27 Feb 2012 21:56:41 +0000 (+0000)
Subject: vn - use DSO_RAWPSIZE flag
X-Git-Tag: v3.4.0rc~1189^2
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/8d3475ef48152a2f10a1cfedfec81253e11a6a87

vn - use DSO_RAWPSIZE flag

 * Use the DSO_RAWPSIZE flag so that the disk subsystem uses vn's own
   psize when the top level fails.

 * This allows the use of vn disks as swap.

Reported-by: Antonio Huete (tuxillo@)
---

diff --git a/sys/dev/disk/vn/vn.c b/sys/dev/disk/vn/vn.c
index 8dcd0bb5e3..c0fa2a3781 100644
--- a/sys/dev/disk/vn/vn.c
+++ b/sys/dev/disk/vn/vn.c
@@ -567,7 +567,7 @@ vniocattach_file(struct vn_softc *vn, struct vn_ioctl *vio, cdev_t dev,
 	 * reserve mbr sector for backwards compatibility
 	 * when no slices exist.
 	 */
-	info.d_dsflags = DSO_COMPATMBR;
+	info.d_dsflags = DSO_COMPATMBR | DSO_RAWPSIZE;
 	info.d_secpertrack = 32;
 	info.d_nheads = 64 / (vn->sc_secsize / DEV_BSIZE);
 	info.d_secpercyl = info.d_secpertrack * info.d_nheads;
@@ -644,7 +644,7 @@ vniocattach_swap(struct vn_softc *vn, struct vn_ioctl *vio, cdev_t dev,
 		 * reserve mbr sector for backwards compatibility
 		 * when no slices exist.
 		 */
-		info.d_dsflags = DSO_COMPATMBR;
+		info.d_dsflags = DSO_COMPATMBR | DSO_RAWPSIZE;
 		info.d_secpertrack = 32;
 		info.d_nheads = 64 / (vn->sc_secsize / DEV_BSIZE);
 		info.d_secpercyl = info.d_secpertrack * info.d_nheads;
@@ -851,7 +851,7 @@ vn_create(int unit, struct devfs_bitmap *bitmap, int clone)
 	bzero(&info, sizeof(struct disk_info));
 	info.d_media_blksize = 512;
 	info.d_media_blocks = 0;
-	info.d_dsflags = DSO_MBRQUIET;
+	info.d_dsflags = DSO_MBRQUIET | DSO_RAWPSIZE;
 	info.d_secpertrack = 32;
 	info.d_nheads = 64;
 	info.d_secpercyl = info.d_secpertrack * info.d_nheads;