Further devilification of CCD:

Change the list interface to simplify things.
Remove old list ioctls which bogusly exported the softc to userland.
Move the softc and associated structures from the public header to
the source file.

1 files changed, 87 insertions, 86 deletions

diff --git a/sys/geom/geom_ccd.c b/sys/geom/geom_ccd.c
index ea3c5ee..e358ff7 100644
--- a/sys/geom/geom_ccd.c
+++ b/sys/geom/geom_ccd.c
@@ -71,6 +71,85 @@
 
 #include <sys/ccdvar.h>
 
+/*
+ * Component info table.
+ * Describes a single component of a concatenated disk.
+ */
+struct ccdcinfo {
+	struct vnode	*ci_vp;			/* device's vnode */
+	dev_t		ci_dev;			/* XXX: device's dev_t */
+	size_t		ci_size; 		/* size */
+	char		*ci_path;		/* path to component */
+	size_t		ci_pathlen;		/* length of component path */
+};
+
+/*
+ * Interleave description table.
+ * Computed at boot time to speed irregular-interleave lookups.
+ * The idea is that we interleave in "groups".  First we interleave
+ * evenly over all component disks up to the size of the smallest
+ * component (the first group), then we interleave evenly over all
+ * remaining disks up to the size of the next-smallest (second group),
+ * and so on.
+ *
+ * Each table entry describes the interleave characteristics of one
+ * of these groups.  For example if a concatenated disk consisted of
+ * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at
+ * DEV_BSIZE (1), the table would have three entries:
+ *
+ *	ndisk	startblk	startoff	dev
+ *	3	0		0		0, 1, 2
+ *	2	9		3		0, 2
+ *	1	13		5		2
+ *	0	-		-		-
+ *
+ * which says that the first nine blocks (0-8) are interleaved over
+ * 3 disks (0, 1, 2) starting at block offset 0 on any component disk,
+ * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting
+ * at component block 3, and the remaining blocks (13-14) are on disk
+ * 2 starting at offset 5.
+ */
+struct ccdiinfo {
+	int	ii_ndisk;	/* # of disks range is interleaved over */
+	daddr_t	ii_startblk;	/* starting scaled block # for range */
+	daddr_t	ii_startoff;	/* starting component offset (block #) */
+	int	*ii_index;	/* ordered list of components in range */
+};
+
+/*
+ * Concatenated disk pseudo-geometry information.
+ */
+struct ccdgeom {
+	u_int32_t	ccg_secsize;	/* # bytes per sector */
+	u_int32_t	ccg_nsectors;	/* # data sectors per track */
+	u_int32_t	ccg_ntracks;	/* # tracks per cylinder */
+	u_int32_t	ccg_ncylinders;	/* # cylinders per unit */
+};
+
+
+/*
+ * A concatenated disk is described by this structure.
+ */
+struct ccd_s {
+	LIST_ENTRY(ccd_s) list;
+
+	int		 sc_unit;		/* logical unit number */
+	struct vnode	 **sc_vpp;		/* array of component vnodes */
+	int		 sc_flags;		/* flags */
+	int		 sc_cflags;		/* configuration flags */
+	size_t		 sc_size;		/* size of ccd */
+	int		 sc_ileave;		/* interleave */
+	u_int		 sc_nccdisks;		/* number of components */
+#define	CCD_MAXNDISKS	 65536
+	struct ccdcinfo	 *sc_cinfo;		/* component info */
+	struct ccdiinfo	 *sc_itable;		/* interleave table */
+	struct ccdgeom   sc_geom;		/* pseudo geometry info */
+	int		 sc_pick;		/* side of mirror picked */
+	daddr_t		 sc_blk[2];		/* mirror localization */
+	struct disk	 *sc_disk;
+	struct cdev	 *__remove00;		/* XXX: remove when convenient */
+};
+
 MALLOC_DEFINE(M_CCD, "CCD driver", "Concatenated Disk driver");
 
 /*
@@ -921,7 +1000,6 @@ ccdctlioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 {
 	struct ccd_ioctl *ccio;
 	u_int unit;
-	int error;
 
 	switch (cmd) {
 	case CCDIOCSET:
@@ -929,85 +1007,8 @@ ccdctlioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 		ccio = (struct ccd_ioctl *)data;
 		unit = ccio->ccio_size;
 		return (ccdioctltoo(unit, cmd, data, flag, td));
-	case CCDCONFINFO:
-		{
-		int ninit = 0;
-		struct ccdconf *conf = (struct ccdconf *)data;
-		struct ccd_s *tmpcs;
-		struct ccd_s *ubuf = conf->buffer;
-
-		/* XXX: LOCK(unique unit numbers) */
-		LIST_FOREACH(tmpcs, &ccd_softc_list, list)
-			if (IS_INITED(tmpcs))
-				ninit++;
-
-		if (conf->size == 0) {
-			conf->size = sizeof(struct ccd_s) * ninit;
-			return (0);
-		} else if ((conf->size / sizeof(struct ccd_s) != ninit) ||
-		    (conf->size % sizeof(struct ccd_s) != 0)) {
-			/* XXX: UNLOCK(unique unit numbers) */
-			return (EINVAL);
-		}
-
-		ubuf += ninit;
-		LIST_FOREACH(tmpcs, &ccd_softc_list, list) {
-			if (!IS_INITED(tmpcs))
-				continue;
-			error = copyout(tmpcs, --ubuf,
-			    sizeof(struct ccd_s));
-			if (error != 0)
-				/* XXX: UNLOCK(unique unit numbers) */
-				return (error);
-		}
-		/* XXX: UNLOCK(unique unit numbers) */
-		return (0);
-		}
-
-	case CCDCPPINFO:
-		{
-		struct ccdcpps *cpps = (struct ccdcpps *)data;
-		char *ubuf = cpps->buffer;
-		struct ccd_s *cs;
-
-	
-		error = copyin(ubuf, &unit, sizeof (unit));
-		if (error)
-			return (error);
-
-		if (!IS_ALLOCATED(unit))
-			return (ENXIO);
-		cs = ccdfind(unit);
-		if (!IS_INITED(cs))
-			return (ENXIO);
-
-		{
-			int len = 0, i;
-			struct ccdcpps *cpps = (struct ccdcpps *)data;
-			char *ubuf = cpps->buffer;
-
-
-			for (i = 0; i < cs->sc_nccdisks; ++i)
-				len += cs->sc_cinfo[i].ci_pathlen;
-
-			if (cpps->size < len)
-				return (ENOMEM);
-
-			for (i = 0; i < cs->sc_nccdisks; ++i) {
-				len = cs->sc_cinfo[i].ci_pathlen;
-				error = copyout(cs->sc_cinfo[i].ci_path, ubuf,
-				    len);
-				if (error != 0)
-					return (error);
-				ubuf += len;
-			}
-			return(copyout("", ubuf, 1));
-		}
-		break;
-		}
-
 	default:
-		return (ENXIO);
+		return (ENOIOCTL);
 	}
 }
 
@@ -1266,7 +1267,7 @@ ccdunlock(struct ccd_s *cs)
 }
 
 static struct sbuf *
-g_ccd_list(int verbose)
+g_ccd_list(int unit)
 {
 	struct sbuf *sb;
 	struct ccd_s *cs;
@@ -1277,11 +1278,8 @@ g_ccd_list(int verbose)
 	LIST_FOREACH(cs, &ccd_softc_list, list) {
 		if (!IS_INITED(cs))
 			continue;
-		if (verbose) {
-			sbuf_printf(sb,
-			    "# ccd\t\tileave\tflags\tcomponent devices\n");
-			verbose = 0;
-		}
+		if (unit >= 0 && unit != cs->sc_unit)
+			continue;
 		sbuf_printf(sb, "ccd%d\t\t%d\t%d\t",
 		    cs->sc_unit, cs->sc_ileave, cs->sc_cflags & CCDF_USERMASK);
 			
@@ -1299,6 +1297,7 @@ static void
 g_ccd_config(struct gctl_req *req, struct g_class *mp, char const *verb)
 {
 	struct sbuf *sb;
+	int u, *up;
 
 	g_topology_assert();
 	if (!strcmp(verb, "create geom")) {
@@ -1306,7 +1305,9 @@ g_ccd_config(struct gctl_req *req, struct g_class *mp, char const *verb)
 	} else if (!strcmp(verb, "destroy geom")) {
 		gctl_error(req, "TBD");
 	} else if (!strcmp(verb, "list")) {
-		sb = g_ccd_list(gctl_get_param(req, "verbose", NULL) ? 1 : 0);
+		up = gctl_get_paraml(req, "unit", sizeof (int));
+		u = *up;
+		sb = g_ccd_list(u);
 		gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
 	} else {
 		gctl_error(req, "unknown verb");