FreeBSD-5.3/sys/dev/vinum/vinumioctl.c
/*
* XXX replace all the checks on object validity with
* calls to valid<object>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/vinum/vinumioctl.c,v 1.51 2004/07/10 21:17:04 marcel Exp $");
/*-
* Copyright (c) 1997, 1998, 1999
* Nan Yang Computer Services Limited. All rights reserved.
*
* Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project.
*
* Written by Greg Lehey
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``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 the company 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.
*
* $Id: vinumioctl.c,v 1.23 2003/05/23 01:02:22 grog Exp grog $
*/
#include <dev/vinum/vinumhdr.h>
#include <dev/vinum/request.h>
#ifdef VINUMDEBUG
#include <sys/reboot.h>
#endif
void attachobject(struct vinum_ioctl_msg *);
void detachobject(struct vinum_ioctl_msg *);
void renameobject(struct vinum_rename_msg *);
void replaceobject(struct vinum_ioctl_msg *);
void moveobject(struct vinum_ioctl_msg *);
void setreadpol(struct vinum_ioctl_msg *);
jmp_buf command_fail; /* return on a failed command */
/* ioctl routine */
int
vinumioctl(struct cdev *dev,
u_long cmd,
caddr_t data,
int flag,
struct thread *td)
{
unsigned int objno;
struct sd *sd;
struct plex *plex;
struct volume *vol;
/* First, decide what we're looking at */
if ((minor(dev) == VINUM_SUPERDEV_MINOR)
|| (minor(dev) == VINUM_DAEMON_MINOR))
return vinum_super_ioctl(dev, cmd, data);
else /* real device */
switch (DEVTYPE(dev)) {
case VINUM_SD_TYPE:
case VINUM_SD2_TYPE: /* second half of sd namespace */
objno = Sdno(dev);
sd = &SD[objno];
switch (cmd) {
case DIOCGSECTORSIZE:
*(u_int *) data = sd->sectorsize;
return 0;
case DIOCGMEDIASIZE:
*(u_int64_t *) data = sd->sectors * sd->sectorsize;
return 0;
/*
* We don't have this stuff on hardware,
* so just pretend to do it so that
* utilities don't get upset.
*/
case DIOCWDINFO: /* write partition info */
case DIOCSDINFO: /* set partition info */
return 0; /* not a titty */
default:
return ENOTTY; /* not my kind of ioctl */
}
return 0; /* pretend we did it */
case VINUM_PLEX_TYPE:
objno = Plexno(dev);
plex = &PLEX[objno];
switch (cmd) {
case DIOCGSECTORSIZE:
*(u_int64_t *) data = plex->sectorsize;
return 0;
case DIOCGMEDIASIZE:
*(u_int64_t *) data = plex->length * plex->sectorsize;
return 0;
/*
* We don't have this stuff on hardware,
* so just pretend to do it so that
* utilities don't get upset.
*/
case DIOCWDINFO: /* write partition info */
case DIOCSDINFO: /* set partition info */
return 0; /* not a titty */
default:
return ENOTTY; /* not my kind of ioctl */
}
return 0; /* pretend we did it */
case VINUM_VOLUME_TYPE:
objno = Volno(dev);
if ((unsigned) objno >= (unsigned) vinum_conf.volumes_allocated) /* not a valid volume */
return ENXIO;
vol = &VOL[objno];
if (vol->state != volume_up) /* not up, */
return EIO; /* I/O error */
switch (cmd) {
case DIOCGSECTORSIZE:
*(u_int *) data = vol->sectorsize;
return 0;
case DIOCGMEDIASIZE:
*(u_int64_t *) data = vol->size * vol->sectorsize;
return 0;
/*
* We don't have this stuff on hardware,
* so just pretend to do it so that
* utilities don't get upset.
*/
case DIOCWDINFO: /* write partition info */
case DIOCSDINFO: /* set partition info */
return 0; /* not a titty */
default:
return ENOTTY; /* not my kind of ioctl */
}
break;
}
return 0; /* XXX */
}
/* Handle ioctls for the super device */
int
vinum_super_ioctl(struct cdev *dev,
u_long cmd,
caddr_t data)
{
int error = 0;
unsigned int index; /* for transferring config info */
unsigned int sdno; /* for transferring config info */
int fe; /* free list element number */
struct _ioctl_reply *ioctl_reply = (struct _ioctl_reply *) data; /* struct to return */
ioctl_reply = (struct _ioctl_reply *) data; /* save the address to reply to */
if (error) /* bombed out */
return 0; /* the reply will contain meaningful info */
switch (cmd) {
#ifdef VINUMDEBUG
case VINUM_DEBUG:
if (((struct debuginfo *) data)->changeit) /* change debug settings */
debug = (((struct debuginfo *) data)->param);
else {
if (debug & DEBUG_REMOTEGDB)
boothowto |= RB_GDB; /* serial debug line */
else
boothowto &= ~RB_GDB; /* local ddb */
kdb_enter("vinum debug");
}
ioctl_reply = (struct _ioctl_reply *) data; /* reinstate the address to reply to */
ioctl_reply->error = 0;
return 0;
#endif
case VINUM_CREATE: /* create a vinum object */
error = lock_config(); /* get the config for us alone */
if (error) /* can't do it, */
return error; /* give up */
error = setjmp(command_fail); /* come back here on error */
if (error == 0) /* first time, */
ioctl_reply->error = parse_user_config((char *) data, /* update the config */
&keyword_set);
else if (ioctl_reply->error == 0) { /* longjmp, but no error status */
ioctl_reply->error = EINVAL; /* note that something's up */
ioctl_reply->msg[0] = '\0'; /* no message? */
}
unlock_config();
return 0; /* must be 0 to return the real error info */
case VINUM_GETCONFIG: /* get the configuration information */
bcopy(&vinum_conf, data, sizeof(vinum_conf));
return 0;
/* start configuring the subsystem */
case VINUM_STARTCONFIG:
return start_config(*(int *) data); /* just lock it. Parameter is 'force' */
/*
* Move the individual parts of the config to user space.
*
* Specify the index of the object in the first word of data,
* and return the object there
*/
case VINUM_DRIVECONFIG:
index = *(int *) data; /* get the index */
if (index >= (unsigned) vinum_conf.drives_allocated) /* can't do it */
return ENXIO; /* bang */
bcopy(&DRIVE[index], data, sizeof(struct _drive)); /* copy the config item out */
return 0;
case VINUM_SDCONFIG:
index = *(int *) data; /* get the index */
if (index >= (unsigned) vinum_conf.subdisks_allocated) /* can't do it */
return ENXIO; /* bang */
bcopy(&SD[index], data, sizeof(struct _sd)); /* copy the config item out */
return 0;
case VINUM_PLEXCONFIG:
index = *(int *) data; /* get the index */
if (index >= (unsigned) vinum_conf.plexes_allocated) /* can't do it */
return ENXIO; /* bang */
bcopy(&PLEX[index], data, sizeof(struct _plex)); /* copy the config item out */
return 0;
case VINUM_VOLCONFIG:
index = *(int *) data; /* get the index */
if (index >= (unsigned) vinum_conf.volumes_allocated) /* can't do it */
return ENXIO; /* bang */
bcopy(&VOL[index], data, sizeof(struct _volume)); /* copy the config item out */
return 0;
case VINUM_PLEXSDCONFIG:
index = *(int *) data; /* get the plex index */
sdno = ((int *) data)[1]; /* and the sd index */
if ((index >= (unsigned) vinum_conf.plexes_allocated) /* plex doesn't exist */
||(sdno >= PLEX[index].subdisks)) /* or it doesn't have this many subdisks */
return ENXIO; /* bang */
bcopy(&SD[PLEX[index].sdnos[sdno]], /* copy the config item out */
data,
sizeof(struct _sd));
return 0;
/*
* We get called in two places: one from the
* userland config routines, which call us
* to complete the config and save it. This
* call supplies the value 0 as a parameter.
*
* The other place is from the user "saveconfig"
* routine, which can only work if we're *not*
* configuring. In this case, supply parameter 1.
*/
case VINUM_SAVECONFIG:
if (VFLAGS & VF_CONFIGURING) { /* must be us, the others are asleep */
if (*(int *) data == 0) /* finish config */
finish_config(1); /* finish the configuration and update it */
else
return EBUSY; /* can't do it now */
}
save_config(); /* save configuration to disk */
return 0;
case VINUM_RELEASECONFIG: /* release the config */
if (VFLAGS & VF_CONFIGURING) { /* must be us, the others are asleep */
finish_config(0); /* finish the configuration, don't change it */
save_config(); /* save configuration to disk */
} else
error = EINVAL; /* release what config? */
return error;
case VINUM_READCONFIG:
if (((char *) data)[0] == '\0')
ioctl_reply->error = vinum_scandisk(NULL); /* built your own list */
else
ioctl_reply->error = vinum_scandisk((char *) data);
if (ioctl_reply->error == ENOENT) {
if (vinum_conf.drives_used > 0)
strcpy(ioctl_reply->msg, "no additional drives found");
else
strcpy(ioctl_reply->msg, "no drives found");
} else if (ioctl_reply->error)
strcpy(ioctl_reply->msg, "can't read configuration information, see log file");
return 0; /* must be 0 to return the real error info */
case VINUM_INIT:
ioctl_reply = (struct _ioctl_reply *) data; /* reinstate the address to reply to */
ioctl_reply->error = 0;
return 0;
case VINUM_RESETCONFIG:
if (vinum_inactive(0)) { /* if the volumes are not active */
/*
* Note the open count. We may be called from v, so we'll be open.
* Keep the count so we don't underflow
*/
free_vinum(1); /* clean up everything */
log(LOG_NOTICE, "vinum: CONFIGURATION OBLITERATED\n");
ioctl_reply = (struct _ioctl_reply *) data; /* reinstate the address to reply to */
ioctl_reply->error = 0;
return 0;
}
return EBUSY;
case VINUM_SETSTATE:
setstate((struct vinum_ioctl_msg *) data); /* set an object state */
return 0;
/*
* Set state by force, without changing
* anything else.
*/
case VINUM_SETSTATE_FORCE:
setstate_by_force((struct vinum_ioctl_msg *) data); /* set an object state */
return 0;
#ifdef VINUMDEBUG
case VINUM_MEMINFO:
vinum_meminfo(data);
return 0;
case VINUM_MALLOCINFO:
return vinum_mallocinfo(data);
case VINUM_RQINFO:
return vinum_rqinfo(data);
#endif
case VINUM_REMOVE:
remove((struct vinum_ioctl_msg *) data); /* remove an object */
return 0;
case VINUM_GETFREELIST: /* get a drive free list element */
index = *(int *) data; /* get the drive index */
fe = ((int *) data)[1]; /* and the free list element */
if ((index >= (unsigned) vinum_conf.drives_allocated) /* plex doesn't exist */
||(DRIVE[index].state == drive_unallocated))
return ENODEV;
if (fe >= DRIVE[index].freelist_entries) /* no such entry */
return ENOENT;
bcopy(&DRIVE[index].freelist[fe],
data,
sizeof(struct drive_freelist));
return 0;
case VINUM_RESETSTATS:
resetstats((struct vinum_ioctl_msg *) data); /* reset object stats */
return 0;
/* attach an object to a superordinate object */
case VINUM_ATTACH:
attachobject((struct vinum_ioctl_msg *) data);
return 0;
/* detach an object from a superordinate object */
case VINUM_DETACH:
detachobject((struct vinum_ioctl_msg *) data);
return 0;
/* rename an object */
case VINUM_RENAME:
renameobject((struct vinum_rename_msg *) data);
return 0;
/* replace an object */
case VINUM_REPLACE:
replaceobject((struct vinum_ioctl_msg *) data);
return 0;
case VINUM_DAEMON:
vinum_daemon(); /* perform the daemon */
return 0;
case VINUM_FINDDAEMON: /* check for presence of daemon */
return vinum_finddaemon();
return 0;
case VINUM_SETDAEMON: /* set daemon flags */
return vinum_setdaemonopts(*(int *) data);
case VINUM_GETDAEMON: /* get daemon flags */
*(int *) data = daemon_options;
return 0;
case VINUM_PARITYOP: /* check/rebuild RAID-4/5 parity */
parityops((struct vinum_ioctl_msg *) data);
return 0;
/* move an object */
case VINUM_MOVE:
moveobject((struct vinum_ioctl_msg *) data);
return 0;
case VINUM_READPOL:
setreadpol((struct vinum_ioctl_msg *) data);
return 0;
default:
/* FALLTHROUGH */
break;
}
return 0; /* to keep the compiler happy */
}
/*
* The following four functions check the supplied
* object index and return a pointer to the object
* if it exists. Otherwise they longjump out via
* throw_rude_remark.
*/
struct drive *
validdrive(int driveno, struct _ioctl_reply *reply)
{
if ((driveno < vinum_conf.drives_allocated)
&& (DRIVE[driveno].state > drive_referenced))
return &DRIVE[driveno];
strcpy(reply->msg, "No such drive");
reply->error = ENOENT;
return NULL;
}
struct sd *
validsd(int sdno, struct _ioctl_reply *reply)
{
if ((sdno < vinum_conf.subdisks_allocated)
&& (SD[sdno].state > sd_referenced))
return &SD[sdno];
strcpy(reply->msg, "No such subdisk");
reply->error = ENOENT;
return NULL;
}
struct plex *
validplex(int plexno, struct _ioctl_reply *reply)
{
if ((plexno < vinum_conf.plexes_allocated)
&& (PLEX[plexno].state > plex_referenced))
return &PLEX[plexno];
strcpy(reply->msg, "No such plex");
reply->error = ENOENT;
return NULL;
}
struct volume *
validvol(int volno, struct _ioctl_reply *reply)
{
if ((volno < vinum_conf.volumes_allocated)
&& (VOL[volno].state > volume_uninit))
return &VOL[volno];
strcpy(reply->msg, "No such volume");
reply->error = ENOENT;
return NULL;
}
/* reset an object's stats */
void
resetstats(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
switch (msg->type) {
case drive_object:
if (msg->index < vinum_conf.drives_allocated) {
struct drive *drive = &DRIVE[msg->index];
if (drive->state > drive_referenced) {
drive->reads = 0; /* number of reads on this drive */
drive->writes = 0; /* number of writes on this drive */
drive->bytes_read = 0; /* number of bytes read */
drive->bytes_written = 0; /* number of bytes written */
reply->error = 0;
return;
}
reply->error = EINVAL;
return;
}
case sd_object:
if (msg->index < vinum_conf.subdisks_allocated) {
struct sd *sd = &SD[msg->index];
if (sd->state > sd_referenced) {
sd->reads = 0; /* number of reads on this subdisk */
sd->writes = 0; /* number of writes on this subdisk */
sd->bytes_read = 0; /* number of bytes read */
sd->bytes_written = 0; /* number of bytes written */
reply->error = 0;
return;
}
reply->error = EINVAL;
return;
}
break;
case plex_object:
if (msg->index < vinum_conf.plexes_allocated) {
struct plex *plex = &PLEX[msg->index];
if (plex->state > plex_referenced) {
plex->reads = 0;
plex->writes = 0; /* number of writes on this plex */
plex->bytes_read = 0; /* number of bytes read */
plex->bytes_written = 0; /* number of bytes written */
plex->recovered_reads = 0; /* number of recovered read operations */
plex->degraded_writes = 0; /* number of degraded writes */
plex->parityless_writes = 0; /* number of parityless writes */
plex->multiblock = 0; /* requests that needed more than one block */
plex->multistripe = 0; /* requests that needed more than one stripe */
reply->error = 0;
return;
}
reply->error = EINVAL;
return;
}
break;
case volume_object:
if (msg->index < vinum_conf.volumes_allocated) {
struct volume *vol = &VOL[msg->index];
if (vol->state > volume_uninit) {
vol->bytes_read = 0; /* number of bytes read */
vol->bytes_written = 0; /* number of bytes written */
vol->reads = 0; /* number of reads on this volume */
vol->writes = 0; /* number of writes on this volume */
vol->recovered_reads = 0; /* reads recovered from another plex */
reply->error = 0;
return;
}
reply->error = EINVAL;
return;
}
case invalid_object: /* can't get this */
reply->error = EINVAL;
return;
}
}
/* attach an object to a superior object */
void
attachobject(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
int sdno;
struct sd *sd;
struct plex *plex;
struct volume *vol;
switch (msg->type) {
case drive_object: /* you can't attach a drive to anything */
case volume_object: /* nor a volume */
case invalid_object: /* "this can't happen" */
reply->error = EINVAL;
reply->msg[0] = '\0'; /* vinum(8) doesn't do this */
return;
case sd_object:
sd = validsd(msg->index, reply);
if (sd == NULL) /* not a valid subdisk */
return;
plex = validplex(msg->otherobject, reply);
if (plex) {
/*
* We should be more intelligent about this.
* We should be able to reattach a dead
* subdisk, but if we want to increase the total
* number of subdisks, we have a lot of reshuffling
* to do. XXX
*/
if ((plex->organization != plex_concat) /* can't attach to striped and RAID-4/5 */
&&(!msg->force)) { /* without using force */
reply->error = EINVAL; /* no message, the user should check */
strcpy(reply->msg, "Can't attach to this plex organization");
} else if (sd->plexno >= 0) { /* already belong to a plex */
reply->error = EBUSY; /* no message, the user should check */
sprintf(reply->msg, "%s is already attached to %s",
sd->name,
sd[sd->plexno].name);
reply->msg[0] = '\0';
} else {
sd->plexoffset = msg->offset; /* this is where we want it */
set_sd_state(sd->sdno, sd_stale, setstate_force); /* make sure it's stale */
give_sd_to_plex(plex->plexno, sd->sdno); /* and give it to the plex */
update_sd_config(sd->sdno, 0);
save_config();
if (sd->state == sd_reviving)
reply->error = EAGAIN; /* need to revive it */
else
reply->error = 0;
}
}
break;
case plex_object:
plex = validplex(msg->index, reply); /* get plex */
if (plex == NULL)
return;
vol = validvol(msg->otherobject, reply); /* and volume information */
if (vol) {
if (vol->plexes == MAXPLEX) { /* we have too many already */
reply->error = ENOSPC; /* nowhere to put it */
strcpy(reply->msg, "Too many plexes");
} else if (plex->volno >= 0) { /* the plex has an owner */
reply->error = EBUSY; /* no message, the user should check */
sprintf(reply->msg, "%s is already attached to %s",
plex->name,
VOL[plex->volno].name);
} else {
for (sdno = 0; sdno < plex->subdisks; sdno++) {
sd = &SD[plex->sdnos[sdno]];
if (sd->state > sd_down) /* real subdisk, vaguely accessible */
set_sd_state(plex->sdnos[sdno], sd_stale, setstate_force); /* make it stale */
}
set_plex_state(plex->plexno, plex_up, setstate_none); /* update plex state */
give_plex_to_volume(msg->otherobject, msg->index, 0); /* and give it to the volume */
update_plex_config(plex->plexno, 0);
save_config();
reply->error = 0; /* all went well */
}
}
}
}
/* detach an object from a superior object */
void
detachobject(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
struct sd *sd;
struct plex *plex;
struct volume *vol;
int sdno;
int plexno;
switch (msg->type) {
case drive_object: /* you can't detach a drive from anything */
case volume_object: /* nor a volume */
case invalid_object: /* "this can't happen" */
reply->error = EINVAL;
reply->msg[0] = '\0'; /* vinum(8) doesn't do this */
return;
case sd_object:
sd = validsd(msg->index, reply);
if (sd == NULL)
return;
if (sd->plexno < 0) { /* doesn't belong to a plex */
reply->error = ENOENT;
strcpy(reply->msg, "Subdisk is not attached");
return;
} else { /* valid plex number */
plex = &PLEX[sd->plexno];
if ((!msg->force) /* don't force things */
&&((plex->state == plex_up) /* and the plex is up */
||((plex->state == plex_flaky) && sd->state == sd_up))) { /* or flaky with this sd up */
reply->error = EBUSY; /* we need this sd */
reply->msg[0] = '\0';
return;
}
sd->plexno = -1; /* anonymous sd */
if (plex->subdisks == 1) { /* this was the only subdisk */
Free(plex->sdnos); /* free the subdisk array */
plex->sdnos = NULL; /* and note the fact */
plex->subdisks_allocated = 0; /* no subdisk space */
} else {
for (sdno = 0; sdno < plex->subdisks; sdno++) {
if (plex->sdnos[sdno] == msg->index) /* found our subdisk */
break;
}
if (sdno < (plex->subdisks - 1)) /* not the last one, compact */
bcopy(&plex->sdnos[sdno + 1],
&plex->sdnos[sdno],
(plex->subdisks - 1 - sdno) * sizeof(int));
}
plex->subdisks--;
if (!bcmp(plex->name, sd->name, strlen(plex->name) + 1))
/* this subdisk is named after the plex */
{
bcopy(sd->name,
&sd->name[3],
min(strlen(sd->name) + 1, MAXSDNAME - 3));
bcopy("ex-", sd->name, 3);
sd->name[MAXSDNAME - 1] = '\0';
}
update_plex_config(plex->plexno, 0);
if (isstriped(plex)) /* we've just mutilated our plex, */
set_plex_state(plex->plexno,
plex_down,
setstate_force | setstate_configuring);
if (plex->volno >= 0) /* plex attached to volume, */
update_volume_config(plex->volno);
save_config();
reply->error = 0;
}
return;
case plex_object:
plex = validplex(msg->index, reply); /* get plex */
if (plex == NULL)
return;
if (plex->volno >= 0) {
int volno = plex->volno;
vol = &VOL[volno];
if ((!msg->force) /* don't force things */
&&((vol->state == volume_up) /* and the volume is up */
&&(vol->plexes == 1))) { /* and this is the last plex */
/*
* XXX As elsewhere, check whether we will lose
* mapping by removing this plex
*/
reply->error = EBUSY; /* we need this plex */
reply->msg[0] = '\0';
return;
}
plex->volno = -1; /* anonymous plex */
for (plexno = 0; plexno < vol->plexes; plexno++) {
if (vol->plex[plexno] == msg->index) /* found our plex */
break;
}
if (plexno < (vol->plexes - 1)) /* not the last one, compact */
bcopy(&vol->plex[plexno + 1],
&vol->plex[plexno],
(vol->plexes - 1 - plexno) * sizeof(int));
vol->plexes--;
vol->last_plex_read = 0; /* don't go beyond the end */
if (!bcmp(vol->name, plex->name, strlen(vol->name) + 1))
/* this plex is named after the volume */
{
/* First, check if the subdisks are the same */
if (msg->recurse) {
int sdno;
for (sdno = 0; sdno < plex->subdisks; sdno++) {
struct sd *sd = &SD[plex->sdnos[sdno]];
if (!bcmp(plex->name, sd->name, strlen(plex->name) + 1))
/* subdisk is named after the plex */
{
bcopy(sd->name,
&sd->name[3],
min(strlen(sd->name) + 1, MAXSDNAME - 3));
bcopy("ex-", sd->name, 3);
sd->name[MAXSDNAME - 1] = '\0';
}
}
}
bcopy(plex->name,
&plex->name[3],
min(strlen(plex->name) + 1, MAXPLEXNAME - 3));
bcopy("ex-", plex->name, 3);
plex->name[MAXPLEXNAME - 1] = '\0';
}
update_volume_config(volno);
save_config();
reply->error = 0;
} else {
reply->error = ENOENT;
strcpy(reply->msg, "Plex is not attached");
}
}
}
void
renameobject(struct vinum_rename_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
struct drive *drive;
struct sd *sd;
struct plex *plex;
struct volume *vol;
switch (msg->type) {
case drive_object: /* you can't attach a drive to anything */
if (find_drive(msg->newname, 0) >= 0) { /* we have that name already, */
reply->error = EEXIST;
reply->msg[0] = '\0';
return;
}
drive = validdrive(msg->index, reply);
if (drive) {
bcopy(msg->newname, drive->label.name, MAXDRIVENAME);
save_config();
reply->error = 0;
}
return;
case sd_object: /* you can't attach a subdisk to anything */
if (find_subdisk(msg->newname, 0) >= 0) { /* we have that name already, */
reply->error = EEXIST;
reply->msg[0] = '\0';
return;
}
sd = validsd(msg->index, reply);
if (sd) {
bcopy(msg->newname, sd->name, MAXSDNAME);
update_sd_config(sd->sdno, 0);
save_config();
reply->error = 0;
}
return;
case plex_object: /* you can't attach a plex to anything */
if (find_plex(msg->newname, 0) >= 0) { /* we have that name already, */
reply->error = EEXIST;
reply->msg[0] = '\0';
return;
}
plex = validplex(msg->index, reply);
if (plex) {
bcopy(msg->newname, plex->name, MAXPLEXNAME);
update_plex_config(plex->plexno, 0);
save_config();
reply->error = 0;
}
return;
case volume_object: /* you can't attach a volume to anything */
if (find_volume(msg->newname, 0) >= 0) { /* we have that name already, */
reply->error = EEXIST;
reply->msg[0] = '\0';
return;
}
vol = validvol(msg->index, reply);
if (vol) {
bcopy(msg->newname, vol->name, MAXVOLNAME);
update_volume_config(msg->index);
save_config();
reply->error = 0;
}
return;
case invalid_object:
reply->error = EINVAL;
reply->msg[0] = '\0';
}
}
/*
* Replace one object with another.
* Currently only for drives.
* message->index is the drive number of the old drive
* message->otherobject is the drive number of the new drive
*/
void
replaceobject(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
reply->error = ENODEV; /* until I know how to do this */
strcpy(reply->msg, "replace not implemented yet");
/* save_config (); */
}
void
moveobject(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
struct drive *drive;
struct sd *sd;
/* Check that our objects are valid (i.e. they exist) */
drive = validdrive(msg->index, (struct _ioctl_reply *) msg);
if (drive == NULL)
return;
sd = validsd(msg->otherobject, (struct _ioctl_reply *) msg);
if (sd == NULL)
return;
if (sd->driveno == msg->index) /* sd already belongs to drive */
return;
if (sd->state > sd_stale)
set_sd_state(sd->sdno, sd_stale, setstate_force); /* make the subdisk stale */
else
sd->state = sd_empty;
if (sd->plexno >= 0) /* part of a plex, */
update_plex_state(sd->plexno); /* update its state */
/* Return the space on the old drive */
if ((sd->driveno >= 0) /* we have a drive, */
&&(sd->sectors > 0)) /* and some space on it */
return_drive_space(sd->driveno, /* return the space */
sd->driveoffset,
sd->sectors);
/* Reassign the old subdisk */
sd->driveno = msg->index;
sd->driveoffset = -1; /* let the drive decide where to put us */
give_sd_to_drive(sd->sdno);
reply->error = 0;
}
void
setreadpol(struct vinum_ioctl_msg *msg)
{
struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;
struct volume *vol;
struct plex *plex;
int myplexno = -1;
/* Check that our objects are valid (i.e. they exist) */
vol = validvol(msg->index, reply);
if (vol == NULL)
return;
/* If a plex was specified, check that is is valid */
if (msg->otherobject >= 0) {
plex = validplex(msg->otherobject, reply);
if (vol == NULL)
return;
/* Is it attached to this volume? */
myplexno = my_plex(msg->index, msg->otherobject);
if (myplexno < 0) {
strcpy(reply->msg, "Plex is not attached to volume");
reply->error = ENOENT;
return;
}
}
lock_config();
vol->preferred_plex = myplexno;
save_config();
unlock_config();
reply->error = 0;
}
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