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

6 files changed, 513 insertions, 4 deletions

diff --git a/sys/geom/vinum/geom_vinum.c b/sys/geom/vinum/geom_vinum.c
index 7cddd3a..5f115e4 100644
--- a/sys/geom/vinum/geom_vinum.c
+++ b/sys/geom/vinum/geom_vinum.c
@@ -502,12 +502,18 @@ gv_config(struct gctl_req *req, struct g_class *mp, char const *verb)
 	} else if (!strcmp(verb, "create")) {
 		gv_create(gp, req);
 
+	} else if (!strcmp(verb, "move")) {
+		gv_move(gp, req);
+
 	} else if (!strcmp(verb, "parityop")) {
 		gv_parityop(gp, req);
 
 	} else if (!strcmp(verb, "remove")) {
 		gv_remove(gp, req);
 
+	} else if (!strcmp(verb, "rename")) {
+		gv_rename(gp, req);
+
 	} else if (!strcmp(verb, "start")) {
 		gv_start_obj(gp, req);
 
diff --git a/sys/geom/vinum/geom_vinum.h b/sys/geom/vinum/geom_vinum.h
index 15216dc..1a31b3b 100644
--- a/sys/geom/vinum/geom_vinum.h
+++ b/sys/geom/vinum/geom_vinum.h
@@ -33,6 +33,7 @@
 
 /* geom_vinum_drive.c */
 void	gv_config_new_drive(struct gv_drive *);
+void	gv_drive_modify(struct gv_drive *);
 void	gv_save_config_all(struct gv_softc *);
 void	gv_save_config(struct g_consumer *, struct gv_drive *,
 	    struct gv_softc *);
@@ -48,8 +49,16 @@ void	gv_ls(struct g_geom *, struct gctl_req *, struct sbuf *);
 void	gv_lv(struct g_geom *, struct gctl_req *, struct sbuf *);
 void	gv_list(struct g_geom *, struct gctl_req *);
 
+/* geom_vinum_move.c */
+void	gv_move(struct g_geom *, struct gctl_req *);
+
+/* geom_vinum_rename.c */
+void	gv_rename(struct g_geom *, struct gctl_req *);
+
 /* geom_vinum_rm.c */
 void	gv_remove(struct g_geom *, struct gctl_req *);
+int	gv_rm_sd(struct gv_softc *sc, struct gctl_req *req,
+	    struct gv_sd *s, int flags);
 
 /* geom_vinum_state.c */
 int	gv_sdstatemap(struct gv_plex *);
diff --git a/sys/geom/vinum/geom_vinum_drive.c b/sys/geom/vinum/geom_vinum_drive.c
index 04a53cb..9554a7f 100644
--- a/sys/geom/vinum/geom_vinum_drive.c
+++ b/sys/geom/vinum/geom_vinum_drive.c
@@ -49,7 +49,6 @@ __FBSDID("$FreeBSD$");
 
 static void	gv_drive_dead(void *, int);
 static void	gv_drive_worker(void *);
-void	gv_drive_modify(struct gv_drive *);
 
 void
 gv_config_new_drive(struct gv_drive *d)
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);
+}
diff --git a/sys/geom/vinum/geom_vinum_rename.c b/sys/geom/vinum/geom_vinum_rename.c
new file mode 100644
index 0000000..666f94d
--- /dev/null
+++ b/sys/geom/vinum/geom_vinum_rename.c
@@ -0,0 +1,284 @@
+/*-
+ *  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_rename_drive(struct gv_softc *, struct gctl_req *,
+		    struct gv_drive *, char *, int);
+static int	gv_rename_plex(struct gv_softc *, struct gctl_req *,
+		    struct gv_plex *, char *, int);
+static int	gv_rename_sd(struct gv_softc *, struct gctl_req *,
+		    struct gv_sd *, char *, int);
+static int	gv_rename_vol(struct gv_softc *, struct gctl_req *,
+		    struct gv_volume *, char *, int);
+
+void
+gv_rename(struct g_geom *gp, struct gctl_req *req)
+{
+	struct gv_softc *sc;
+	struct gv_volume *v;
+	struct gv_plex *p;
+	struct gv_sd *s;
+	struct gv_drive *d;
+	char *newname, *object;
+	int err, *flags, type;
+
+	sc = gp->softc;
+
+	flags = gctl_get_paraml(req, "flags", sizeof(*flags));
+
+	newname = gctl_get_param(req, "newname", NULL);
+	if (newname == NULL) {
+		gctl_error(req, "no new name given");
+		return;
+	}
+
+	object = gctl_get_param(req, "object", NULL);
+	if (object == NULL) {
+		gctl_error(req, "no object given");
+		return;
+	}
+
+	type = gv_object_type(sc, object);
+	switch (type) {
+	case GV_TYPE_VOL:
+		v = gv_find_vol(sc, object);
+		if (v == NULL) 	{
+			gctl_error(req, "unknown volume '%s'", object);
+			return;
+		}
+		err = gv_rename_vol(sc, req, v, newname, *flags);
+		if (err)
+			return;
+		break;
+	case GV_TYPE_PLEX:
+		p = gv_find_plex(sc, object);
+		if (p == NULL) {
+			gctl_error(req, "unknown plex '%s'", object);
+			return;
+		}
+		err = gv_rename_plex(sc, req, p, newname, *flags);
+		if (err)
+			return;
+		break;
+	case GV_TYPE_SD:
+		s = gv_find_sd(sc, object);
+		if (s == NULL) {
+			gctl_error(req, "unknown subdisk '%s'", object);
+			return;
+		}
+		err = gv_rename_sd(sc, req, s, newname, *flags);
+		if (err)
+			return;
+		break;
+	case GV_TYPE_DRIVE:
+		d = gv_find_drive(sc, object);
+		if (d == NULL) {
+			gctl_error(req, "unknown drive '%s'", object);
+			return;
+		}
+		err = gv_rename_drive(sc, req, d, newname, *flags);
+		if (err)
+			return;
+		break;
+	default:
+		gctl_error(req, "unknown object '%s'", object);
+		return;
+	}
+
+	gv_save_config_all(sc);
+}
+
+static int 
+gv_rename_drive(struct gv_softc *sc, struct gctl_req *req, struct gv_drive *d, char *newname, int flags)
+{
+	struct gv_sd *s;
+
+	g_topology_assert();
+	KASSERT(d != NULL, ("gv_rename_drive: NULL d"));
+
+	if (gv_object_type(sc, newname) != -1) {
+		gctl_error(req, "drive name '%s' already in use", newname);
+		return (-1);
+	}
+
+	strncpy(d->name, newname, GV_MAXDRIVENAME);
+
+	/* XXX can we rename providers here? */
+
+	LIST_FOREACH(s, &d->subdisks, from_drive)
+		strncpy(s->drive, d->name, GV_MAXDRIVENAME);
+
+	return (0);
+}
+
+static int	
+gv_rename_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, char *newname, int flags)
+{
+	struct gv_sd *s;
+	char plexnumber[GV_MAXPLEXNAME], *pplexnumber;
+	char oldplexname[GV_MAXPLEXNAME], *poldplexname;
+	int err;
+
+	pplexnumber = plexnumber;
+	poldplexname = oldplexname;
+
+	g_topology_assert();
+	KASSERT(p != NULL, ("gv_rename_plex: NULL p"));
+
+	if (gv_object_type(sc, newname) != -1) {
+		gctl_error(req, "plex name '%s' already in use", newname);
+		return (-1);
+	}
+
+	strncpy(oldplexname, p->name, GV_MAXPLEXNAME);
+	strsep(&poldplexname, ".");
+	strncpy(plexnumber, p->name, GV_MAXPLEXNAME);
+	strsep(&pplexnumber, ".");
+	if (strcmp(poldplexname, pplexnumber)) {
+		gctl_error(req, "current and proposed plex numbers (%s, %s) "
+		    "do not match", pplexnumber, poldplexname);
+		return (-1);
+	}
+
+	strncpy(p->name, newname, GV_MAXPLEXNAME);
+
+	/* XXX can we rename providers here? */
+
+	/* Fix up references and potentially rename subdisks. */
+	LIST_FOREACH(s, &p->subdisks, in_plex) {
+		strncpy(s->plex, p->name, GV_MAXPLEXNAME); 
+		if (flags && GV_FLAG_R) {
+			char newsdname[GV_MAXSDNAME];
+			char oldsdname[GV_MAXSDNAME];
+			char *poldsdname = oldsdname;
+			strncpy(oldsdname, s->name, GV_MAXSDNAME);
+			strsep(&poldsdname, ".");
+			strsep(&poldsdname, ".");
+			snprintf(newsdname, GV_MAXSDNAME, "%s.%s", p->name,
+			    poldsdname);
+			err = gv_rename_sd(sc, req, s, newsdname, flags);
+			if (err)
+				return (err);
+		}
+	}
+
+	return (0);
+}
+
+/*
+ * gv_rename_sd: renames a subdisk.  Note that the 'flags' argument is ignored,
+ * since there are no structures below a subdisk.  Similarly, we don't have to
+ * clean up any references elsewhere to the subdisk's name.
+ */
+static int 
+gv_rename_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, char * newname, int flags)  
+{
+        char newsdnumber[GV_MAXSDNAME], *pnewsdnumber;
+	char oldsdnumber[GV_MAXSDNAME], *poldsdnumber;
+
+	pnewsdnumber = newsdnumber;
+	poldsdnumber = oldsdnumber;
+
+	g_topology_assert();
+	KASSERT(s != NULL, ("gv_rename_sd: NULL s"));
+
+	if (gv_object_type(sc, newname) != -1) {
+		gctl_error(req, "subdisk name %s already in use", newname);
+		return (-1);
+	}
+
+	strncpy(oldsdnumber, s->name, GV_MAXSDNAME);
+	strsep(&poldsdnumber, ".");
+	strsep(&poldsdnumber, ".");
+	strncpy(newsdnumber, newname, GV_MAXSDNAME);
+	strsep(&pnewsdnumber, ".");
+	strsep(&pnewsdnumber, ".");
+	if (strcmp(pnewsdnumber, poldsdnumber)) {
+		gctl_error(req, "current and proposed sd numbers (%s, %s) do "
+		    "not match", poldsdnumber, pnewsdnumber);
+		return (-1);
+	}
+
+	strncpy(s->name, newname, GV_MAXSDNAME);
+
+	/* XXX: can we rename providers here? */
+
+	return (0);
+}
+
+static int 
+gv_rename_vol(struct gv_softc *sc, struct gctl_req *req, struct gv_volume *v, char *newname, int flags)
+{
+	struct gv_plex *p;
+	int err;
+
+	g_topology_assert();
+	KASSERT(v != NULL, ("gv_rename_vol: NULL v"));
+
+	if (gv_object_type(sc, newname) != -1) {
+		gctl_error(req, "volume name %s already in use", newname);
+		return (-1);
+	}
+
+	/* Rename the volume. */
+	strncpy(v->name, newname, GV_MAXVOLNAME);
+
+	/* Fix up references and potentially rename plexes. */
+	LIST_FOREACH(p, &v->plexes, in_volume) {
+		strncpy(p->volume, v->name, GV_MAXVOLNAME);
+		if (flags && GV_FLAG_R) {
+			char newplexname[GV_MAXPLEXNAME];
+			char oldplexname[GV_MAXPLEXNAME];
+			char *poldplexname = oldplexname;
+			strncpy(oldplexname, p->name, GV_MAXPLEXNAME);
+			strsep(&poldplexname, ".");
+			snprintf(newplexname, GV_MAXPLEXNAME, "%s.%s",
+			    v->name, poldplexname);
+			err = gv_rename_plex(sc, req, p, newplexname, flags);
+			if (err)
+				return err;
+		}
+	}
+       
+	return (0);
+}
diff --git a/sys/geom/vinum/geom_vinum_rm.c b/sys/geom/vinum/geom_vinum_rm.c
index 44b6110..eb188b7 100644
--- a/sys/geom/vinum/geom_vinum_rm.c
+++ b/sys/geom/vinum/geom_vinum_rm.c
@@ -43,8 +43,6 @@ static int	gv_rm_drive(struct gv_softc *, struct gctl_req *,
 		    struct gv_drive *, int);
 static int	gv_rm_plex(struct gv_softc *, struct gctl_req *,
 		    struct gv_plex *, int);
-static int	gv_rm_sd(struct gv_softc *, struct gctl_req *, struct gv_sd *,
-		    int);
 static int	gv_rm_vol(struct gv_softc *, struct gctl_req *,
 		    struct gv_volume *, int);
 
@@ -240,7 +238,7 @@ gv_rm_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, int fla
 }
 
 /* Remove a subdisk. */
-static int
+int
 gv_rm_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, int flags)
 {
 	struct g_provider *pp;