Invalidate dcache and inode cache

When performing a 'zfs rollback' it's critical to invalidate
the previous dcache and inode cache.  If we don't there will
stale cache entries which when accessed will result in EIOs.

diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c
index 1763d17..bb2fdb0 100644 (file)
--- a/module/zfs/zfs_vfsops.c
+++ b/module/zfs/zfs_vfsops.c
@@ -1071,17 +1071,17 @@ zfsvfs_teardown(zfs_sb_t *zsb, boolean_t unmounting)
 
        rrw_enter(&zsb->z_teardown_lock, RW_WRITER, FTAG);
 
-#ifdef HAVE_DNLC
        if (!unmounting) {
                /*
-                * We purge the parent filesystem's vfsp as the parent
-                * filesystem and all of its snapshots have their vnode's
-                * v_vfsp set to the parent's filesystem's vfsp.  Note,
-                * 'z_parent' is self referential for non-snapshots.
+                * We purge the parent filesystem's super block as the
+                * parent filesystem and all of its snapshots have their
+                * inode's super block set to the parent's filesystem's
+                * super block.  Note,  'z_parent' is self referential
+                * for non-snapshots.
                 */
-               (void) dnlc_purge_vfsp(zsb->z_parent->z_vfs, 0);
+               shrink_dcache_sb(zsb->z_parent->z_sb);
+               invalidate_inodes(zsb->z_parent->z_sb);
        }
-#endif /* HAVE_DNLC */
 
        /*
         * Close the zil. NB: Can't close the zil while zfs_inactive