vn_fullpath() and devices

[Igor Shmukler]

hello,

i reported before that vn_fullpath() does not currently deal with VCHR type of vnodes.

There is an easy solution for this:

                 if (vnp->v_type == VCHR) {
                           fullpath = vnp->v_rdev->si_name;
                           VOP_UNLOCK(vnp, 0, td);
                           len = sizeof("/dev/") + strlen(fullpath);
  	                        freepath = vdt_malloc(len);
  	                        sprintf(freepath, "/dev/%s", fullpath);
  	                        fullpath = freepath;
                 } else {

it this works for everyone, i could make and test a patch against whatever branch is 
appropriate.

thank you,
igor