Add the set and unset verbs used to set and clear attributes for

partition entries. Implement the setunset method for the MBR
scheme to control the active flag.

sys/geom/part/g_part.c

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2002, 2005, 2006, 2007 Marcel Moolenaar
+ * Copyright (c) 2002, 2005-2008 Marcel Moolenaar
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -121,7 +121,9 @@ enum g_part_ctl {
 	G_PART_CTL_MOVE,
 	G_PART_CTL_RECOVER,
 	G_PART_CTL_RESIZE,
-	G_PART_CTL_UNDO
+	G_PART_CTL_SET,
+	G_PART_CTL_UNDO,
+	G_PART_CTL_UNSET
 };
 
 /*
@@ -953,6 +955,53 @@ g_part_ctl_resize(struct gctl_req *req, struct g_part_parms *gpp)
 	return (ENOSYS);
 } 
 
+static int
+g_part_ctl_setunset(struct gctl_req *req, struct g_part_parms *gpp,
+    unsigned int set)
+{
+	char buf[32];
+	struct g_geom *gp;
+	struct g_part_entry *entry;
+	struct g_part_table *table;
+	struct sbuf *sb;
+	int error;
+
+	gp = gpp->gpp_geom;
+	G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name));
+	g_topology_assert();
+
+	table = gp->softc;
+
+	LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) {
+		if (entry->gpe_deleted || entry->gpe_internal)
+			continue;
+		if (entry->gpe_index == gpp->gpp_index)
+			break;
+	}
+	if (entry == NULL) {
+		gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index);
+		return (ENOENT);
+	}
+
+	error = G_PART_SETUNSET(table, entry, gpp->gpp_attrib, set);
+	if (error) {
+		gctl_error(req, "%d attrib '%s'", error, gpp->gpp_attrib);
+		return (error);
+	}
+
+	/* Provide feedback if so requested. */
+	if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
+		sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
+		sbuf_printf(sb, "%s%s has %s %sset\n", gp->name,
+		    G_PART_NAME(table, entry, buf, sizeof(buf)),
+		    gpp->gpp_attrib, (set) ? "" : "un");
+		sbuf_finish(sb);
+		gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
+		sbuf_delete(sb);
+	}
+	return (0);
+}
+
 static int
 g_part_ctl_undo(struct gctl_req *req, struct g_part_parms *gpp)
 {
@@ -1129,11 +1178,22 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
 			mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX;
 		}
 		break;
+	case 's':
+		if (!strcmp(verb, "set")) {
+			ctlreq = G_PART_CTL_SET;
+			mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM |
+			    G_PART_PARM_INDEX;
+		}
+		break;
 	case 'u':
 		if (!strcmp(verb, "undo")) {
 			ctlreq = G_PART_CTL_UNDO;
 			mparms |= G_PART_PARM_GEOM;
 			modifies = 0;
+		} else if (!strcmp(verb, "unset")) {
+			ctlreq = G_PART_CTL_UNSET;
+			mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM |
+			    G_PART_PARM_INDEX;
 		}
 		break;
 	}
@@ -1147,6 +1207,10 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
 		ap = &req->arg[i];
 		parm = 0;
 		switch (ap->name[0]) {
+		case 'a':
+			if (!strcmp(ap->name, "attrib"))
+				parm = G_PART_PARM_ATTRIB;
+			break;
 		case 'b':
 			if (!strcmp(ap->name, "bootcode"))
 				parm = G_PART_PARM_BOOTCODE;
@@ -1215,6 +1279,9 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
 			return;
 		}
 		switch (parm) {
+		case G_PART_PARM_ATTRIB:
+			error = g_part_parm_str(p, &gpp.gpp_attrib);
+			break;
 		case G_PART_PARM_BOOTCODE:
 			gpp.gpp_codeptr = p;
 			gpp.gpp_codesize = len;
@@ -1328,9 +1395,15 @@ g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb)
 	case G_PART_CTL_RESIZE:
 		error = g_part_ctl_resize(req, &gpp);
 		break;
+	case G_PART_CTL_SET:
+		error = g_part_ctl_setunset(req, &gpp, 1);
+		break;
 	case G_PART_CTL_UNDO:
 		error = g_part_ctl_undo(req, &gpp);
 		break;
+	case G_PART_CTL_UNSET:
+		error = g_part_ctl_setunset(req, &gpp, 0);
+		break;
 	}
 
 	/* Implement automatic commit. */

sys/geom/part/g_part.h

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2006, 2007 Marcel Moolenaar
+ * Copyright (c) 2006-2008 Marcel Moolenaar
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -136,6 +136,7 @@ struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
 #define	G_PART_PARM_TYPE	0x0400
 #define	G_PART_PARM_VERSION	0x0800
 #define	G_PART_PARM_BOOTCODE	0x1000
+#define	G_PART_PARM_ATTRIB	0x2000
 
 struct g_part_parms {
 	unsigned int	gpp_parms;
@@ -152,6 +153,7 @@ struct g_part_parms {
 	unsigned int	gpp_version;
 	const void	*gpp_codeptr;
 	unsigned int	gpp_codesize;
+	const char	*gpp_attrib;
 };
 
 void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);

sys/geom/part/g_part_if.m

@@ -1,5 +1,5 @@
 #-
-# Copyright (c) 2006, 2007 Marcel Moolenaar
+# Copyright (c) 2006-2008 Marcel Moolenaar
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -108,6 +108,14 @@ METHOD int read {
 	struct g_consumer *cp;
 };
 
+# setunset() - set or unset partition entry attributes.
+METHOD int setunset {
+	struct g_part_table *table;
+	struct g_part_entry *entry;
+	const char *attrib;
+	unsigned int set;
+};
+
 # type() - return a string representation of the partition type.
 # Preferrably, the alias names.
 METHOD const char * type {

sys/geom/part/g_part_mbr.c

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2007 Marcel Moolenaar
+ * Copyright (c) 2007, 2008 Marcel Moolenaar
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -71,6 +71,8 @@ static char *g_part_mbr_name(struct g_part_table *, struct g_part_entry *,
     char *, size_t);
 static int g_part_mbr_probe(struct g_part_table *, struct g_consumer *);
 static int g_part_mbr_read(struct g_part_table *, struct g_consumer *);
+static int g_part_mbr_setunset(struct g_part_table *, struct g_part_entry *,
+    const char *, unsigned int);
 static const char *g_part_mbr_type(struct g_part_table *, struct g_part_entry *,
     char *, size_t);
 static int g_part_mbr_write(struct g_part_table *, struct g_consumer *);
@@ -86,6 +88,7 @@ static kobj_method_t g_part_mbr_methods[] = {
 	KOBJMETHOD(g_part_name,		g_part_mbr_name),
 	KOBJMETHOD(g_part_probe,	g_part_mbr_probe),
 	KOBJMETHOD(g_part_read,		g_part_mbr_read),
+	KOBJMETHOD(g_part_setunset,	g_part_mbr_setunset),
 	KOBJMETHOD(g_part_type,		g_part_mbr_type),
 	KOBJMETHOD(g_part_write,	g_part_mbr_write),
 	{ 0, 0 }
@@ -262,6 +265,8 @@ g_part_mbr_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
 		/* confxml: partition entry information */
 		sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
 		    entry->ent.dp_typ);
+		if (entry->ent.dp_flag & 0x80)
+			sbuf_printf(sb, "%s<attrib>active</attrib>\n", indent);
 	} else {
 		/* confxml: scheme information */
 	}
@@ -420,6 +425,43 @@ g_part_mbr_read(struct g_part_table *basetable, struct g_consumer *cp)
 	return (0);
 }
 
+static int
+g_part_mbr_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
+    const char *attrib, unsigned int set)
+{
+	struct g_part_entry *iter;
+	struct g_part_mbr_entry *entry;
+	int changed;
+
+	if (strcasecmp(attrib, "active") != 0)
+		return (EINVAL);
+
+	/* Only one entry can have the active attribute. */
+	LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
+		if (iter->gpe_deleted)
+			continue;
+		changed = 0;
+		entry = (struct g_part_mbr_entry *)iter;
+		if (iter == baseentry) {
+			if (set && (entry->ent.dp_flag & 0x80) == 0) {
+				entry->ent.dp_flag |= 0x80;
+				changed = 1;
+			} else if (!set && (entry->ent.dp_flag & 0x80)) {
+				entry->ent.dp_flag &= ~0x80;
+				changed = 1;
+			}
+		} else {
+			if (set && (entry->ent.dp_flag & 0x80)) {
+				entry->ent.dp_flag &= ~0x80;
+				changed = 1;
+			}
+		}
+		if (changed && !iter->gpe_created)
+			iter->gpe_modified = 1;
+	}
+	return (0);
+}
+
 static const char *
 g_part_mbr_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 
     char *buf, size_t bufsz)