Finally bring in what was produced during Google SoC 2005:

Add functions to rename objects and to move a subdisk from one drive
to another.

Obtained from:  Chris Jones <chris.jones@ualberta.ca>
Sponsored by:   Google Summer of Code 2005
MFC in:         1 week

1 files changed, 213 insertions, 0 deletions

diff --git a/sys/geom/vinum/geom_vinum_move.c b/sys/geom/vinum/geom_vinum_move.c
new file mode 100644
index 0000000..6d094ba
--- /dev/null
+++ b/sys/geom/vinum/geom_vinum_move.c
@@ -0,0 +1,213 @@
+/*-
+ *  Copyright (c) 2005 Chris Jones
+ *  All rights reserved.
+ * 
+ * This software was developed for the FreeBSD Project by Chris Jones   
+ * thanks to the support of Google's Summer of Code program and         
+ * mentoring by Lukas Ertl. 
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/libkern.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+#include <geom/geom.h>
+#include <geom/vinum/geom_vinum_var.h>
+#include <geom/vinum/geom_vinum.h>
+#include <geom/vinum/geom_vinum_share.h>
+
+static int      gv_move_sd(struct gv_softc *, struct gctl_req *,
+		    struct gv_sd *, char *, int);
+
+void
+gv_move(struct g_geom *gp, struct gctl_req *req)
+{
+	struct gv_softc *sc;
+	struct gv_sd *s;
+	char buf[20], *destination, *object;
+	int *argc, err, *flags, i, type;
+
+	sc = gp->softc;
+
+	argc = gctl_get_paraml(req, "argc", sizeof(*argc));
+	flags = gctl_get_paraml(req, "flags", sizeof(*flags));
+	destination = gctl_get_param(req, "destination", NULL);
+	if (destination == NULL) {
+		gctl_error(req, "no destination given");
+		return;
+	}
+	if (gv_object_type(sc, destination) != GV_TYPE_DRIVE) {
+		gctl_error(req, "destination '%s' is not a drive", destination);
+		return;
+	}
+
+	/*
+	 * We start with 1 here, because argv[0] on the command line is the
+	 * destination drive.
+	 */
+	for (i = 1; i < *argc; i++) {
+		snprintf(buf, sizeof(buf), "argv%d", i);
+		object = gctl_get_param(req, buf, NULL);
+		if (object == NULL)
+			continue;
+
+		type = gv_object_type(sc, object);
+		if (type != GV_TYPE_SD) {
+			gctl_error(req, "you can only move subdisks; "
+			    "'%s' isn't one", object);
+			return;
+		}
+
+		s = gv_find_sd(sc, object);
+		if (s == NULL) {
+			gctl_error(req, "unknown subdisk '%s'", object);
+			return;
+		}
+		err = gv_move_sd(sc, req, s, destination, *flags);
+		if (err) 
+			return;
+	}
+
+	gv_save_config_all(sc);
+}
+
+/* Move a subdisk. */
+static int
+gv_move_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *cursd, char *destination, int flags)
+{
+	struct gv_drive *d;
+	struct gv_sd *newsd, *s, *s2;
+	struct gv_plex *p;
+	struct g_consumer *cp;
+	char errstr[ERRBUFSIZ];
+        int err;
+
+        g_topology_assert();
+        KASSERT(cursd != NULL, ("gv_move_sd: NULL cursd")); 
+
+	cp = cursd->consumer;
+
+	if (cp->acr || cp->acw || cp->ace) {
+		gctl_error(req, "subdisk '%s' is busy", cursd->name);
+		return (-1);
+	}
+
+	if (!(flags && GV_FLAG_F)) {
+		gctl_error(req, "-f flag not passed; move would be "
+		    "destructive");
+		return (-1);
+	}
+
+	d = gv_find_drive(sc, destination);
+	if (d == NULL) {
+		gctl_error(req, "destination drive '%s' not found",
+		    destination);
+		return (-1);
+	}
+
+	if (d == cursd->drive_sc) {
+		gctl_error(req, "subdisk '%s' already on drive '%s'",
+		    cursd->name, destination);
+		return (-1);
+	}
+
+	/* XXX: Does it have to be part of a plex? */
+	p = gv_find_plex(sc, cursd->plex);
+	if (p == NULL) {
+		gctl_error(req, "subdisk '%s' is not part of a plex",
+		    cursd->name);
+		return (-1);
+	}
+	
+	/* Stale the old subdisk. */
+	err = gv_set_sd_state(cursd, GV_SD_STALE,
+	    GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
+	if (err) {
+		gctl_error(req, "could not set the subdisk '%s' to state "
+		    "'stale'", cursd->name);
+		return (err);
+	}
+
+	/*
+	 * Create new subdisk. Ideally, we'd use gv_new_sd, but that requires
+	 * us to create a string for it to parse, which is silly.
+	 * TODO: maybe refactor gv_new_sd such that this is no longer the case.
+	 */
+	newsd = g_malloc(sizeof(struct gv_sd), M_WAITOK | M_ZERO);
+	newsd->plex_offset = cursd->plex_offset;
+	newsd->size = cursd->size; 
+	newsd->drive_offset = -1;
+	strncpy(newsd->name, cursd->name, GV_MAXSDNAME);
+	strncpy(newsd->drive, destination, GV_MAXDRIVENAME);
+	strncpy(newsd->plex, cursd->plex, GV_MAXPLEXNAME);
+	newsd->state = GV_SD_STALE;
+	newsd->vinumconf = cursd->vinumconf;
+
+	err = gv_sd_to_drive(sc, d, newsd, errstr, ERRBUFSIZ);
+	if (err) {
+		/* XXX not enough free space? */
+		gctl_error(req, errstr);
+		g_free(newsd);
+		return (err);
+	}
+
+	/* Replace the old sd by the new one. */
+	g_detach(cp);
+	LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2) {
+		if (s == cursd) {
+			p->sdcount--;
+			p->size -= s->size;
+			err = gv_rm_sd(sc, req, s, 0);
+			if (err)
+				return (err);
+			
+		}
+	}
+
+	gv_sd_to_plex(p, newsd, 1);
+
+	/* Creates the new providers.... */
+	gv_drive_modify(d);
+
+	/* And reconnect the consumer ... */
+	newsd->consumer = cp;
+	err = g_attach(cp, newsd->provider);
+	if (err) {
+		g_destroy_consumer(cp);
+		gctl_error(req, "proposed move would create a loop in GEOM "
+		    "config");
+		return (err);
+	}
+
+	LIST_INSERT_HEAD(&sc->subdisks, newsd, sd);
+
+	gv_save_config_all(sc);
+
+	return (0);
+}