vinum root mount cannot be found

[Rumko]

Vinum cannot read the configuration off of partitions ATM during boot since it
starts accessing (or more precisely tries to) the slices and partitions before
they are registered with devfs (before I can see things like "da0: type 0xa5,
start 63, end = 312581807, size 312581745 : OK" in dmesg which is printed by
ckeck_part() which is called by mbrinit() in sys/kern/subr_diskmbr.c).

Talked with Simon (corecode) on IRC and according to him, it seems vinuminit
needs to be run after disk probing (which currently does not).


P.S.: Also while playing around with vinum, produced the following patchset
which maybe could be useful?
1. When calling init_drive() from read_drive_label() change the static 0 with
the verbose var that is passed to read_drive_label().
2. Changed the way the drives are parsed in vinum_scandisk() and removed the
second iteration of detecting vinum partitions ... everything should be done
in the first iteration? If you provide the slice and maybe even the partitions
it should check that, otherwise it should check everything including the
compatibility slice?
-- 
Regards,
Rumko
diff --git a/sys/dev/raid/vinum/vinumio.c b/sys/dev/raid/vinum/vinumio.c
index 14b5c19..ec88411 100644
--- a/sys/dev/raid/vinum/vinumio.c
+++ b/sys/dev/raid/vinum/vinumio.c
@@ -327,7 +327,7 @@ read_drive_label(struct drive *drive, int verbose)
     int result;
     struct vinum_hdr *vhdr;
 
-    error = init_drive(drive, 0);			    /* find the drive */
+    error = init_drive(drive, verbose);			    /* find the drive */
     if (error)						    /* find the drive */
 	return DL_CANT_OPEN;				    /* not ours */
 
@@ -702,7 +702,7 @@ vinum_scandisk(char *devicename[], int drives)
 	char part;					    /* UNIX partition */
 	int slice;
 	int founddrive;					    /* flag when we find a vinum drive */
-	int has_slice = 0;
+	int has_slice = -1;
 	int has_part = 0;
 	char *tmp;
 
@@ -715,31 +715,27 @@ vinum_scandisk(char *devicename[], int drives)
 	 */
 	if ((tmp = rindex(devicename[driveno], '/')) == NULL)
 	    tmp = devicename[driveno];
-	while (*tmp && (*tmp < '0' || *tmp > '9'))
-	    ++tmp;
-	while (*tmp && *tmp >= '0' && *tmp <= '9')
-	    ++tmp;
-	if (*tmp == 's')
-	    has_slice = strtol(tmp + 1, &tmp, 0);
-	if (*tmp >= 'a' && *tmp <= 'p')
-	    has_part = *tmp;
+	else
+		tmp++;
+	ksscanf(tmp, "%*[a-z]%*d%*[s]%d%c", &has_slice, &has_part);
 
-	/*
-	 * Scan slices if no slice was specified, only if no partition was
-	 * specified.
-	 */
-	if (has_slice == 0 && has_part == 0)
 	for (slice = 0; slice < MAX_SLICES; slice++) {
-	    if (has_slice && slice != has_slice)
+	    if (has_slice >= 0 && slice != has_slice)
 		continue;
 
 	    for (part = 'a'; part < 'a' + MAXPARTITIONS; part++) {
-		if (has_part && part != has_part)
-		    continue;
 		if (part == 'c')
 		    continue;
-		ksnprintf(partname, DRIVENAMELEN,
-			"%ss%d%c", devicename[driveno], slice, part);
+		if (has_part && part != has_part)
+		    continue;
+		if (has_slice >= 0 && has_part)
+			strncpy(partname, devicename[driveno], DRIVENAMELEN);
+		else if (has_slice >= 0)
+			ksnprintf(partname, DRIVENAMELEN,
+				"%s%c", devicename[driveno], part);
+		else
+			ksnprintf(partname, DRIVENAMELEN,
+				"%ss%d%c", devicename[driveno], slice, part);
 		drive = check_drive(partname);	    /* try to open it */
 		if ((drive->lasterror != 0)		    /* didn't work, */
 		    ||(drive->state != drive_up))
@@ -756,34 +752,6 @@ vinum_scandisk(char *devicename[], int drives)
 		}
 	    }
 	}
-	if (founddrive == 0 && has_slice == 0) {	    /* didn't find anything, */
-	    for (part = 'a'; part < 'a' + MAXPARTITIONS; part++) {	    /* try the compatibility partition */
-		if (has_part && has_part != part)
-		    continue;
-		if (part == 'c')
-		    continue;
-		if (has_part) {
-		    ksnprintf(partname, DRIVENAMELEN,
-			    "%s", devicename[driveno]);
-		} else {
-		    ksnprintf(partname, DRIVENAMELEN,
-			    "%s%c", devicename[driveno], part);
-		}
-		drive = check_drive(partname);	    /* try to open it */
-		if ((drive->lasterror != 0)		    /* didn't work, */
-		||(drive->state != drive_up))
-		    free_drive(drive);		    /* get rid of it */
-		else if (drive->flags & VF_CONFIGURED)  /* already read this config, */
-		    log(LOG_WARNING,
-			"vinum: already read config from %s\n", /* say so */
-			drive->label.name);
-		else {
-		    drivelist[gooddrives] = drive->driveno;	/* keep the drive index */
-		    drive->flags &= ~VF_NEWBORN;	    /* which is no longer newly born */
-		    gooddrives++;
-		}
-	    }
-	}
     }
 
     if (gooddrives == 0) {