Correct fsck journal-recovery code to update a cylinder-group

check-hash after making changes to the cylinder group. The problem
was that the journal-recovery code was calling the libufs bwrite()
function instead of the cgput() function. The cgput() function updates
the cylinder-group check-hash before writing the cylinder group.

This change required the additions of the cgget() and cgput() functions
to the libufs API to avoid a gratuitous bcopy of every cylinder group
to be read or written. These new functions have been added to the
libufs manual pages. This was the first opportunity that I have had
to use and document the use of the EDOOFUS error code.

Reviewed by: kib
Reported by: emaste and others

1 files changed, 1 insertions, 2 deletions

diff --git a/sbin/fsck_ffs/suj.c b/sbin/fsck_ffs/suj.c
index 69ed3d5e59ac..186697c03103 100644
--- a/sbin/fsck_ffs/suj.c
+++ b/sbin/fsck_ffs/suj.c
@@ -1892,8 +1892,7 @@ cg_write(struct suj_cg *sc)
 	 * before writing the block.
 	 */
 	fs->fs_cs(fs, sc->sc_cgx) = cgp->cg_cs;
-	if (bwrite(disk, fsbtodb(fs, cgtod(fs, sc->sc_cgx)), sc->sc_cgbuf,
-	    fs->fs_bsize) == -1)
+	if (cgput(disk, cgp) == -1)
 		err_suj("Unable to write cylinder group %d\n", sc->sc_cgx);
 }