Add disk_enumerate() for finding names of disks. Vinum and libh will

need this RSN.

Remove a pointless warning in the root device locating code.

Remove the "wd" compatibility name from the "ad" driver.

WARNING: If you have not updated to use /dev/wd* in your /etc/fstab
and modern bootblocks, it would be a very good idea to do so BEFORE
you upgrade your kernel.

sys/amd64/amd64/autoconf.c

@@ -276,10 +276,8 @@ setroot()
 	}
 	majdev = B_TYPE(bootdev);
 	dev = makebdev(majdev, 0);
-	if (devsw(dev) == NULL) {
-		printf("no devsw (majdev=%d bootdev=%#lx)\n", majdev, bootdev);
+	if (devsw(dev) == NULL)
 		return;
-	}
 	unit = B_UNIT(bootdev);
 	slice = B_SLICE(bootdev);
 	if (slice == WHOLE_DISK_SLICE)

sys/dev/ata/ata-disk.c

@@ -72,23 +72,6 @@ static struct cdevsw ad_cdevsw = {
 	/* bmaj */	30
 };
 static struct cdevsw addisk_cdevsw;
-static struct cdevsw fakewd_cdevsw = {
-	/* open */	adopen,
-	/* close */	nullclose,
-	/* read */	physread,
-	/* write */	physwrite,
-	/* ioctl */	noioctl,
-	/* poll */	nopoll,
-	/* mmap */	nommap,
-	/* strategy */	adstrategy,
-	/* name */	"wd",
-	/* maj */	3,
-	/* dump */	addump,
-	/* psize */	nopsize,
-	/* flags */	D_DISK,
-	/* bmaj */	0
-};
-static struct cdevsw fakewddisk_cdevsw;
 
 /* prototypes */
 static void ad_timeout(struct ad_request *);
@@ -196,12 +179,6 @@ ad_attach(struct ata_softc *scp, int32_t device)
     dev->si_iosize_max = 256 * DEV_BSIZE;
     adp->dev1 = dev;
 
-    dev = disk_create(adp->lun, &adp->disk, 0, &fakewd_cdevsw,
-		       &fakewddisk_cdevsw);
-    dev->si_drv1 = adp;
-    dev->si_iosize_max = 256 * DEV_BSIZE;
-    adp->dev2 = dev;
-
     bioq_init(&adp->queue);
 }
 
@@ -210,7 +187,6 @@ ad_detach(struct ad_softc *adp)
 {
     disk_invalidate(&adp->disk);
     disk_destroy(adp->dev1);
-    disk_destroy(adp->dev2);
     devstat_remove_entry(&adp->stats);
     ata_free_lun(&adp_lun_map, adp->lun);
     free(adp, M_AD);

sys/i386/i386/autoconf.c

@@ -276,10 +276,8 @@ setroot()
 	}
 	majdev = B_TYPE(bootdev);
 	dev = makebdev(majdev, 0);
-	if (devsw(dev) == NULL) {
-		printf("no devsw (majdev=%d bootdev=%#lx)\n", majdev, bootdev);
+	if (devsw(dev) == NULL)
 		return;
-	}
 	unit = B_UNIT(bootdev);
 	slice = B_SLICE(bootdev);
 	if (slice == WHOLE_DISK_SLICE)

sys/kern/subr_disk.c

@@ -27,6 +27,8 @@ static d_open_t diskopen;
 static d_close_t diskclose; 
 static d_ioctl_t diskioctl;
 static d_psize_t diskpsize;
+
+static LIST_HEAD(, disk) disklist = LIST_HEAD_INITIALIZER(&disklist);
  
 dev_t
 disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
@@ -49,12 +51,13 @@ disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct
 	if (bootverbose)
 		printf("Creating DISK %s%d\n", cdevsw->d_name, unit);
 	dev = make_dev(proto, dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART),
-	    0, 0, 0, "r%s%d", cdevsw->d_name, unit);
+	    0, 0, 0, "%s%d", cdevsw->d_name, unit);
 
 	dev->si_disk = dp;
 	dp->d_dev = dev;
 	dp->d_dsflags = flags;
 	dp->d_devsw = cdevsw;
+	LIST_INSERT_HEAD(&disklist, dp, d_list);
 	return (dev);
 }
 
@@ -95,11 +98,22 @@ disk_invalidate (struct disk *disk)
 void
 disk_destroy(dev_t dev)
 {
+	LIST_REMOVE(dev->si_disk, d_list);
+	bzero(dev->si_disk, sizeof(*dev->si_disk));
     	dev->si_disk = NULL;
 	destroy_dev(dev);
 	return;
 }
 
+struct disk *
+disk_enumerate(struct disk *disk)
+{
+	if (!disk)
+		return (LIST_FIRST(&disklist));
+	else
+		return (LIST_NEXT(disk, d_list));
+}
+
 /*
  * The cdevsw functions
  */

sys/sys/disk.h

@@ -21,6 +21,8 @@
 #include <sys/disklabel.h>
 #endif /* _SYS_DISKLABEL */
 
+#include <sys/queue.h>
+
 struct disk {
 	u_int			d_flags;
 	u_int			d_dsflags;
@@ -28,6 +30,7 @@ struct disk {
 	dev_t			d_dev;
 	struct diskslices	*d_slice;
 	struct disklabel	d_label;
+	LIST_ENTRY(disk)	d_list;
 };
 
 #define DISKFLAG_LOCK		0x1
@@ -36,6 +39,7 @@ struct disk {
 dev_t disk_create __P((int unit, struct disk *disk, int flags, struct cdevsw *cdevsw, struct cdevsw *diskdevsw));
 void disk_destroy __P((dev_t dev));
 int disk_dumpcheck __P((dev_t dev, u_int *count, u_int *blkno, u_int *secsize));
+struct disk *disk_enumerate __P((struct disk *disk));
 void disk_invalidate __P((struct disk *disk));
 
 #endif /* _SYS_DISK_H_ */