| Current Path : /usr/src/sys/geom/concat/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/geom/concat/g_concat.c |
/*-
* Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* 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 THE AUTHORS 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 THE AUTHORS 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: release/9.1.0/sys/geom/concat/g_concat.c 223921 2011-07-11 05:22:31Z ae $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/concat/g_concat.h>
FEATURE(geom_concat, "GEOM concatenation support");
static MALLOC_DEFINE(M_CONCAT, "concat_data", "GEOM_CONCAT Data");
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, "GEOM_CONCAT stuff");
static u_int g_concat_debug = 0;
TUNABLE_INT("kern.geom.concat.debug", &g_concat_debug);
SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RW, &g_concat_debug, 0,
"Debug level");
static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force);
static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp);
static g_taste_t g_concat_taste;
static g_ctl_req_t g_concat_config;
static g_dumpconf_t g_concat_dumpconf;
struct g_class g_concat_class = {
.name = G_CONCAT_CLASS_NAME,
.version = G_VERSION,
.ctlreq = g_concat_config,
.taste = g_concat_taste,
.destroy_geom = g_concat_destroy_geom
};
/*
* Greatest Common Divisor.
*/
static u_int
gcd(u_int a, u_int b)
{
u_int c;
while (b != 0) {
c = a;
a = b;
b = (c % b);
}
return (a);
}
/*
* Least Common Multiple.
*/
static u_int
lcm(u_int a, u_int b)
{
return ((a * b) / gcd(a, b));
}
/*
* Return the number of valid disks.
*/
static u_int
g_concat_nvalid(struct g_concat_softc *sc)
{
u_int i, no;
no = 0;
for (i = 0; i < sc->sc_ndisks; i++) {
if (sc->sc_disks[i].d_consumer != NULL)
no++;
}
return (no);
}
static void
g_concat_remove_disk(struct g_concat_disk *disk)
{
struct g_consumer *cp;
struct g_concat_softc *sc;
KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__));
sc = disk->d_softc;
cp = disk->d_consumer;
G_CONCAT_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
sc->sc_name);
disk->d_consumer = NULL;
if (sc->sc_provider != NULL) {
sc->sc_provider->flags |= G_PF_WITHER;
g_orphan_provider(sc->sc_provider, ENXIO);
sc->sc_provider = NULL;
G_CONCAT_DEBUG(0, "Device %s removed.", sc->sc_name);
}
if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
g_detach(cp);
g_destroy_consumer(cp);
}
static void
g_concat_orphan(struct g_consumer *cp)
{
struct g_concat_softc *sc;
struct g_concat_disk *disk;
struct g_geom *gp;
g_topology_assert();
gp = cp->geom;
sc = gp->softc;
if (sc == NULL)
return;
disk = cp->private;
if (disk == NULL) /* Possible? */
return;
g_concat_remove_disk(disk);
/* If there are no valid disks anymore, remove device. */
if (g_concat_nvalid(sc) == 0)
g_concat_destroy(sc, 1);
}
static int
g_concat_access(struct g_provider *pp, int dr, int dw, int de)
{
struct g_consumer *cp1, *cp2;
struct g_concat_softc *sc;
struct g_geom *gp;
int error;
gp = pp->geom;
sc = gp->softc;
if (sc == NULL) {
/*
* It looks like geom is being withered.
* In that case we allow only negative requests.
*/
KASSERT(dr <= 0 && dw <= 0 && de <= 0,
("Positive access request (device=%s).", pp->name));
if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 &&
(pp->ace + de) == 0) {
G_CONCAT_DEBUG(0, "Device %s definitely destroyed.",
gp->name);
}
return (0);
}
/* On first open, grab an extra "exclusive" bit */
if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
de++;
/* ... and let go of it on last close */
if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0)
de--;
error = ENXIO;
LIST_FOREACH(cp1, &gp->consumer, consumer) {
error = g_access(cp1, dr, dw, de);
if (error == 0)
continue;
/*
* If we fail here, backout all previous changes.
*/
LIST_FOREACH(cp2, &gp->consumer, consumer) {
if (cp1 == cp2)
return (error);
g_access(cp2, -dr, -dw, -de);
}
/* NOTREACHED */
}
return (error);
}
static void
g_concat_kernel_dump(struct bio *bp)
{
struct g_concat_softc *sc;
struct g_concat_disk *disk;
struct bio *cbp;
struct g_kerneldump *gkd;
u_int i;
sc = bp->bio_to->geom->softc;
gkd = (struct g_kerneldump *)bp->bio_data;
for (i = 0; i < sc->sc_ndisks; i++) {
if (sc->sc_disks[i].d_start <= gkd->offset &&
sc->sc_disks[i].d_end > gkd->offset)
break;
}
if (i == sc->sc_ndisks)
g_io_deliver(bp, EOPNOTSUPP);
disk = &sc->sc_disks[i];
gkd->offset -= disk->d_start;
if (gkd->length > disk->d_end - disk->d_start - gkd->offset)
gkd->length = disk->d_end - disk->d_start - gkd->offset;
cbp = g_clone_bio(bp);
if (cbp == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
cbp->bio_done = g_std_done;
g_io_request(cbp, disk->d_consumer);
G_CONCAT_DEBUG(1, "Kernel dump will go to %s.",
disk->d_consumer->provider->name);
}
static void
g_concat_flush(struct g_concat_softc *sc, struct bio *bp)
{
struct bio_queue_head queue;
struct g_consumer *cp;
struct bio *cbp;
u_int no;
bioq_init(&queue);
for (no = 0; no < sc->sc_ndisks; no++) {
cbp = g_clone_bio(bp);
if (cbp == NULL) {
for (cbp = bioq_first(&queue); cbp != NULL;
cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
g_destroy_bio(cbp);
}
if (bp->bio_error == 0)
bp->bio_error = ENOMEM;
g_io_deliver(bp, bp->bio_error);
return;
}
bioq_insert_tail(&queue, cbp);
cbp->bio_done = g_std_done;
cbp->bio_caller1 = sc->sc_disks[no].d_consumer;
cbp->bio_to = sc->sc_disks[no].d_consumer->provider;
}
for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
G_CONCAT_LOGREQ(cbp, "Sending request.");
cp = cbp->bio_caller1;
cbp->bio_caller1 = NULL;
g_io_request(cbp, cp);
}
}
static void
g_concat_start(struct bio *bp)
{
struct bio_queue_head queue;
struct g_concat_softc *sc;
struct g_concat_disk *disk;
struct g_provider *pp;
off_t offset, end, length, off, len;
struct bio *cbp;
char *addr;
u_int no;
pp = bp->bio_to;
sc = pp->geom->softc;
/*
* If sc == NULL, provider's error should be set and g_concat_start()
* should not be called at all.
*/
KASSERT(sc != NULL,
("Provider's error should be set (error=%d)(device=%s).",
bp->bio_to->error, bp->bio_to->name));
G_CONCAT_LOGREQ(bp, "Request received.");
switch (bp->bio_cmd) {
case BIO_READ:
case BIO_WRITE:
case BIO_DELETE:
break;
case BIO_FLUSH:
g_concat_flush(sc, bp);
return;
case BIO_GETATTR:
if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) {
g_concat_kernel_dump(bp);
return;
}
/* To which provider it should be delivered? */
/* FALLTHROUGH */
default:
g_io_deliver(bp, EOPNOTSUPP);
return;
}
offset = bp->bio_offset;
length = bp->bio_length;
addr = bp->bio_data;
end = offset + length;
bioq_init(&queue);
for (no = 0; no < sc->sc_ndisks; no++) {
disk = &sc->sc_disks[no];
if (disk->d_end <= offset)
continue;
if (disk->d_start >= end)
break;
off = offset - disk->d_start;
len = MIN(length, disk->d_end - offset);
length -= len;
offset += len;
cbp = g_clone_bio(bp);
if (cbp == NULL) {
for (cbp = bioq_first(&queue); cbp != NULL;
cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
g_destroy_bio(cbp);
}
if (bp->bio_error == 0)
bp->bio_error = ENOMEM;
g_io_deliver(bp, bp->bio_error);
return;
}
bioq_insert_tail(&queue, cbp);
/*
* Fill in the component buf structure.
*/
cbp->bio_done = g_std_done;
cbp->bio_offset = off;
cbp->bio_data = addr;
addr += len;
cbp->bio_length = len;
cbp->bio_to = disk->d_consumer->provider;
cbp->bio_caller1 = disk;
if (length == 0)
break;
}
KASSERT(length == 0,
("Length is still greater than 0 (class=%s, name=%s).",
bp->bio_to->geom->class->name, bp->bio_to->geom->name));
for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) {
bioq_remove(&queue, cbp);
G_CONCAT_LOGREQ(cbp, "Sending request.");
disk = cbp->bio_caller1;
cbp->bio_caller1 = NULL;
g_io_request(cbp, disk->d_consumer);
}
}
static void
g_concat_check_and_run(struct g_concat_softc *sc)
{
struct g_concat_disk *disk;
struct g_provider *pp;
u_int no, sectorsize = 0;
off_t start;
if (g_concat_nvalid(sc) != sc->sc_ndisks)
return;
pp = g_new_providerf(sc->sc_geom, "concat/%s", sc->sc_name);
start = 0;
for (no = 0; no < sc->sc_ndisks; no++) {
disk = &sc->sc_disks[no];
disk->d_start = start;
disk->d_end = disk->d_start +
disk->d_consumer->provider->mediasize;
if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC)
disk->d_end -= disk->d_consumer->provider->sectorsize;
start = disk->d_end;
if (no == 0)
sectorsize = disk->d_consumer->provider->sectorsize;
else {
sectorsize = lcm(sectorsize,
disk->d_consumer->provider->sectorsize);
}
}
pp->sectorsize = sectorsize;
/* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */
pp->mediasize = start;
pp->stripesize = sc->sc_disks[0].d_consumer->provider->stripesize;
pp->stripeoffset = sc->sc_disks[0].d_consumer->provider->stripeoffset;
sc->sc_provider = pp;
g_error_provider(pp, 0);
G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_name);
}
static int
g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md)
{
struct g_provider *pp;
u_char *buf;
int error;
g_topology_assert();
error = g_access(cp, 1, 0, 0);
if (error != 0)
return (error);
pp = cp->provider;
g_topology_unlock();
buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
&error);
g_topology_lock();
g_access(cp, -1, 0, 0);
if (buf == NULL)
return (error);
/* Decode metadata. */
concat_metadata_decode(buf, md);
g_free(buf);
return (0);
}
/*
* Add disk to given device.
*/
static int
g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no)
{
struct g_concat_disk *disk;
struct g_consumer *cp, *fcp;
struct g_geom *gp;
int error;
/* Metadata corrupted? */
if (no >= sc->sc_ndisks)
return (EINVAL);
disk = &sc->sc_disks[no];
/* Check if disk is not already attached. */
if (disk->d_consumer != NULL)
return (EEXIST);
gp = sc->sc_geom;
fcp = LIST_FIRST(&gp->consumer);
cp = g_new_consumer(gp);
error = g_attach(cp, pp);
if (error != 0) {
g_destroy_consumer(cp);
return (error);
}
if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) {
error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
if (error != 0) {
g_detach(cp);
g_destroy_consumer(cp);
return (error);
}
}
if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) {
struct g_concat_metadata md;
/* Re-read metadata. */
error = g_concat_read_metadata(cp, &md);
if (error != 0)
goto fail;
if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 ||
strcmp(md.md_name, sc->sc_name) != 0 ||
md.md_id != sc->sc_id) {
G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name);
goto fail;
}
}
cp->private = disk;
disk->d_consumer = cp;
disk->d_softc = sc;
disk->d_start = 0; /* not yet */
disk->d_end = 0; /* not yet */
G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name);
g_concat_check_and_run(sc);
return (0);
fail:
if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0))
g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace);
g_detach(cp);
g_destroy_consumer(cp);
return (error);
}
static struct g_geom *
g_concat_create(struct g_class *mp, const struct g_concat_metadata *md,
u_int type)
{
struct g_concat_softc *sc;
struct g_geom *gp;
u_int no;
G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name,
md->md_id);
/* One disks is minimum. */
if (md->md_all < 1)
return (NULL);
/* Check for duplicate unit */
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) {
G_CONCAT_DEBUG(0, "Device %s already configured.",
gp->name);
return (NULL);
}
}
gp = g_new_geomf(mp, "%s", md->md_name);
sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO);
gp->start = g_concat_start;
gp->spoiled = g_concat_orphan;
gp->orphan = g_concat_orphan;
gp->access = g_concat_access;
gp->dumpconf = g_concat_dumpconf;
sc->sc_id = md->md_id;
sc->sc_ndisks = md->md_all;
sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks,
M_CONCAT, M_WAITOK | M_ZERO);
for (no = 0; no < sc->sc_ndisks; no++)
sc->sc_disks[no].d_consumer = NULL;
sc->sc_type = type;
gp->softc = sc;
sc->sc_geom = gp;
sc->sc_provider = NULL;
G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id);
return (gp);
}
static int
g_concat_destroy(struct g_concat_softc *sc, boolean_t force)
{
struct g_provider *pp;
struct g_geom *gp;
u_int no;
g_topology_assert();
if (sc == NULL)
return (ENXIO);
pp = sc->sc_provider;
if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
if (force) {
G_CONCAT_DEBUG(0, "Device %s is still open, so it "
"can't be definitely removed.", pp->name);
} else {
G_CONCAT_DEBUG(1,
"Device %s is still open (r%dw%de%d).", pp->name,
pp->acr, pp->acw, pp->ace);
return (EBUSY);
}
}
for (no = 0; no < sc->sc_ndisks; no++) {
if (sc->sc_disks[no].d_consumer != NULL)
g_concat_remove_disk(&sc->sc_disks[no]);
}
gp = sc->sc_geom;
gp->softc = NULL;
KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)",
gp->name));
free(sc->sc_disks, M_CONCAT);
free(sc, M_CONCAT);
pp = LIST_FIRST(&gp->provider);
if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0))
G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name);
g_wither_geom(gp, ENXIO);
return (0);
}
static int
g_concat_destroy_geom(struct gctl_req *req __unused,
struct g_class *mp __unused, struct g_geom *gp)
{
struct g_concat_softc *sc;
sc = gp->softc;
return (g_concat_destroy(sc, 0));
}
static struct g_geom *
g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_concat_metadata md;
struct g_concat_softc *sc;
struct g_consumer *cp;
struct g_geom *gp;
int error;
g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
g_topology_assert();
/* Skip providers that are already open for writing. */
if (pp->acw > 0)
return (NULL);
G_CONCAT_DEBUG(3, "Tasting %s.", pp->name);
gp = g_new_geomf(mp, "concat:taste");
gp->start = g_concat_start;
gp->access = g_concat_access;
gp->orphan = g_concat_orphan;
cp = g_new_consumer(gp);
g_attach(cp, pp);
error = g_concat_read_metadata(cp, &md);
g_detach(cp);
g_destroy_consumer(cp);
g_destroy_geom(gp);
if (error != 0)
return (NULL);
gp = NULL;
if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0)
return (NULL);
if (md.md_version > G_CONCAT_VERSION) {
printf("geom_concat.ko module is too old to handle %s.\n",
pp->name);
return (NULL);
}
/*
* Backward compatibility:
*/
/* There was no md_provider field in earlier versions of metadata. */
if (md.md_version < 3)
bzero(md.md_provider, sizeof(md.md_provider));
/* There was no md_provsize field in earlier versions of metadata. */
if (md.md_version < 4)
md.md_provsize = pp->mediasize;
if (md.md_provider[0] != '\0' &&
!g_compare_names(md.md_provider, pp->name))
return (NULL);
if (md.md_provsize != pp->mediasize)
return (NULL);
/*
* Let's check if device already exists.
*/
sc = NULL;
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL)
continue;
if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC)
continue;
if (strcmp(md.md_name, sc->sc_name) != 0)
continue;
if (md.md_id != sc->sc_id)
continue;
break;
}
if (gp != NULL) {
G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
error = g_concat_add_disk(sc, pp, md.md_no);
if (error != 0) {
G_CONCAT_DEBUG(0,
"Cannot add disk %s to %s (error=%d).", pp->name,
gp->name, error);
return (NULL);
}
} else {
gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC);
if (gp == NULL) {
G_CONCAT_DEBUG(0, "Cannot create device %s.",
md.md_name);
return (NULL);
}
sc = gp->softc;
G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
error = g_concat_add_disk(sc, pp, md.md_no);
if (error != 0) {
G_CONCAT_DEBUG(0,
"Cannot add disk %s to %s (error=%d).", pp->name,
gp->name, error);
g_concat_destroy(sc, 1);
return (NULL);
}
}
return (gp);
}
static void
g_concat_ctl_create(struct gctl_req *req, struct g_class *mp)
{
u_int attached, no;
struct g_concat_metadata md;
struct g_provider *pp;
struct g_concat_softc *sc;
struct g_geom *gp;
struct sbuf *sb;
const char *name;
char param[16];
int *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs < 2) {
gctl_error(req, "Too few arguments.");
return;
}
strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic));
md.md_version = G_CONCAT_VERSION;
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
strlcpy(md.md_name, name, sizeof(md.md_name));
md.md_id = arc4random();
md.md_no = 0;
md.md_all = *nargs - 1;
bzero(md.md_provider, sizeof(md.md_provider));
/* This field is not important here. */
md.md_provsize = 0;
/* Check all providers are valid */
for (no = 1; no < *nargs; no++) {
snprintf(param, sizeof(param), "arg%u", no);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", no);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL) {
G_CONCAT_DEBUG(1, "Disk %s is invalid.", name);
gctl_error(req, "Disk %s is invalid.", name);
return;
}
}
gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL);
if (gp == NULL) {
gctl_error(req, "Can't configure %s.", md.md_name);
return;
}
sc = gp->softc;
sb = sbuf_new_auto();
sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name);
for (attached = 0, no = 1; no < *nargs; no++) {
snprintf(param, sizeof(param), "arg%u", no);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument.", no);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
KASSERT(pp != NULL, ("Provider %s disappear?!", name));
if (g_concat_add_disk(sc, pp, no - 1) != 0) {
G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.",
no, pp->name, gp->name);
sbuf_printf(sb, " %s", pp->name);
continue;
}
attached++;
}
sbuf_finish(sb);
if (md.md_all != attached) {
g_concat_destroy(gp->softc, 1);
gctl_error(req, "%s", sbuf_data(sb));
}
sbuf_delete(sb);
}
static struct g_concat_softc *
g_concat_find_device(struct g_class *mp, const char *name)
{
struct g_concat_softc *sc;
struct g_geom *gp;
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL)
continue;
if (strcmp(sc->sc_name, name) == 0)
return (sc);
}
return (NULL);
}
static void
g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp)
{
struct g_concat_softc *sc;
int *force, *nargs, error;
const char *name;
char param[16];
u_int i;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No '%s' argument.", "force");
return;
}
for (i = 0; i < (u_int)*nargs; i++) {
snprintf(param, sizeof(param), "arg%u", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", i);
return;
}
sc = g_concat_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
error = g_concat_destroy(sc, *force);
if (error != 0) {
gctl_error(req, "Cannot destroy device %s (error=%d).",
sc->sc_name, error);
return;
}
}
}
static void
g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
uint32_t *version;
g_topology_assert();
version = gctl_get_paraml(req, "version", sizeof(*version));
if (version == NULL) {
gctl_error(req, "No '%s' argument.", "version");
return;
}
if (*version != G_CONCAT_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
if (strcmp(verb, "create") == 0) {
g_concat_ctl_create(req, mp);
return;
} else if (strcmp(verb, "destroy") == 0 ||
strcmp(verb, "stop") == 0) {
g_concat_ctl_destroy(req, mp);
return;
}
gctl_error(req, "Unknown verb.");
}
static void
g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp, struct g_provider *pp)
{
struct g_concat_softc *sc;
g_topology_assert();
sc = gp->softc;
if (sc == NULL)
return;
if (pp != NULL) {
/* Nothing here. */
} else if (cp != NULL) {
struct g_concat_disk *disk;
disk = cp->private;
if (disk == NULL)
return;
sbuf_printf(sb, "%s<End>%jd</End>\n", indent,
(intmax_t)disk->d_end);
sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent,
(intmax_t)disk->d_start);
} else {
sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id);
sbuf_printf(sb, "%s<Type>", indent);
switch (sc->sc_type) {
case G_CONCAT_TYPE_AUTOMATIC:
sbuf_printf(sb, "AUTOMATIC");
break;
case G_CONCAT_TYPE_MANUAL:
sbuf_printf(sb, "MANUAL");
break;
default:
sbuf_printf(sb, "UNKNOWN");
break;
}
sbuf_printf(sb, "</Type>\n");
sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n",
indent, sc->sc_ndisks, g_concat_nvalid(sc));
sbuf_printf(sb, "%s<State>", indent);
if (sc->sc_provider != NULL && sc->sc_provider->error == 0)
sbuf_printf(sb, "UP");
else
sbuf_printf(sb, "DOWN");
sbuf_printf(sb, "</State>\n");
}
}
DECLARE_GEOM_CLASS(g_concat_class, g_concat);