Before this patch CAM periph drivers called both disk_alloc() and disk_create() same time on periph creation. But then prevented disks from opening until the periph probe completion with cam_periph_hold(). As result, especially if disk misbehaves during the probe, GEOM event thread, triggered to taste the disk, got blocked on open attempt, potentially for a long time, unable to process other events. This patch moves disk_create() call from periph creation to the end of the probe. To allow disk_create() calls from non-sleepable CAM contexts some of its duties requiring memory allocations are moved either back to disk_alloc() or forward to g_disk_create(), so now disk_alloc() and disk_add_alias() are the only disk methods that require sleeping. If disk fails during the probe disk_create() may just be skipped, going directly to disk_destroy(). Other method calls during that time are just ignored. Since GEOM may now see the disks after CAM bus scan is already completed, introduce per-periph boot hold functions. Enclosure driver already had such mechanism, so just generalize it. Reviewed by: imp MFC after: 1 month Sponsored by: iXsystems, Inc. Differential Revision: https://reviews.freebsd.org/D35784
1112 lines
27 KiB
C
1112 lines
27 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 2002 Poul-Henning Kamp
|
|
* Copyright (c) 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
|
|
* and NAI Labs, the Security Research Division of Network Associates, Inc.
|
|
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
|
* DARPA CHATS research program.
|
|
*
|
|
* 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. The names of the authors may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE 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 THE 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 "opt_geom.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/ctype.h>
|
|
#include <sys/devctl.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/msan.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/devicestat.h>
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <geom/geom.h>
|
|
#include <geom/geom_disk.h>
|
|
#include <geom/geom_int.h>
|
|
|
|
#include <dev/led/led.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
struct g_disk_softc {
|
|
struct disk *dp;
|
|
struct devstat *d_devstat;
|
|
struct sysctl_ctx_list sysctl_ctx;
|
|
struct sysctl_oid *sysctl_tree;
|
|
char led[64];
|
|
uint32_t state;
|
|
struct mtx done_mtx;
|
|
};
|
|
|
|
static g_access_t g_disk_access;
|
|
static g_start_t g_disk_start;
|
|
static g_ioctl_t g_disk_ioctl;
|
|
static g_dumpconf_t g_disk_dumpconf;
|
|
static g_provgone_t g_disk_providergone;
|
|
|
|
static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS);
|
|
|
|
static struct g_class g_disk_class = {
|
|
.name = G_DISK_CLASS_NAME,
|
|
.version = G_VERSION,
|
|
.start = g_disk_start,
|
|
.access = g_disk_access,
|
|
.ioctl = g_disk_ioctl,
|
|
.providergone = g_disk_providergone,
|
|
.dumpconf = g_disk_dumpconf,
|
|
};
|
|
|
|
SYSCTL_DECL(_kern_geom);
|
|
static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"GEOM_DISK stuff");
|
|
|
|
DECLARE_GEOM_CLASS(g_disk_class, g_disk);
|
|
|
|
static int
|
|
g_disk_access(struct g_provider *pp, int r, int w, int e)
|
|
{
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
int error;
|
|
|
|
g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
|
|
pp->name, r, w, e);
|
|
g_topology_assert();
|
|
sc = pp->private;
|
|
if ((dp = sc->dp) == NULL || dp->d_destroyed) {
|
|
/*
|
|
* Allow decreasing access count even if disk is not
|
|
* available anymore.
|
|
*/
|
|
if (r <= 0 && w <= 0 && e <= 0)
|
|
return (0);
|
|
return (ENXIO);
|
|
}
|
|
r += pp->acr;
|
|
w += pp->acw;
|
|
e += pp->ace;
|
|
error = 0;
|
|
if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
|
|
/*
|
|
* It would be better to defer this decision to d_open if
|
|
* it was able to take flags.
|
|
*/
|
|
if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
|
|
error = EROFS;
|
|
if (error == 0 && dp->d_open != NULL)
|
|
error = dp->d_open(dp);
|
|
if (bootverbose && error != 0)
|
|
printf("Opened disk %s -> %d\n", pp->name, error);
|
|
if (error != 0)
|
|
return (error);
|
|
pp->sectorsize = dp->d_sectorsize;
|
|
if (dp->d_maxsize == 0) {
|
|
printf("WARNING: Disk drive %s%d has no d_maxsize\n",
|
|
dp->d_name, dp->d_unit);
|
|
dp->d_maxsize = DFLTPHYS;
|
|
}
|
|
if (dp->d_delmaxsize == 0) {
|
|
if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
|
|
printf("WARNING: Disk drive %s%d has no "
|
|
"d_delmaxsize\n", dp->d_name, dp->d_unit);
|
|
}
|
|
dp->d_delmaxsize = dp->d_maxsize;
|
|
}
|
|
pp->stripeoffset = dp->d_stripeoffset;
|
|
pp->stripesize = dp->d_stripesize;
|
|
dp->d_flags |= DISKFLAG_OPEN;
|
|
/*
|
|
* Do not invoke resize event when initial size was zero.
|
|
* Some disks report its size only after first opening.
|
|
*/
|
|
if (pp->mediasize == 0)
|
|
pp->mediasize = dp->d_mediasize;
|
|
else
|
|
g_resize_provider(pp, dp->d_mediasize);
|
|
} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
|
|
if (dp->d_close != NULL) {
|
|
error = dp->d_close(dp);
|
|
if (error != 0)
|
|
printf("Closed disk %s -> %d\n",
|
|
pp->name, error);
|
|
}
|
|
sc->state = G_STATE_ACTIVE;
|
|
if (sc->led[0] != 0)
|
|
led_set(sc->led, "0");
|
|
dp->d_flags &= ~DISKFLAG_OPEN;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
g_disk_kerneldump(struct bio *bp, struct disk *dp)
|
|
{
|
|
struct g_kerneldump *gkd;
|
|
struct g_geom *gp;
|
|
|
|
gkd = (struct g_kerneldump*)bp->bio_data;
|
|
gp = bp->bio_to->geom;
|
|
g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
|
|
gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
|
|
if (dp->d_dump == NULL) {
|
|
g_io_deliver(bp, ENODEV);
|
|
return;
|
|
}
|
|
gkd->di.dumper = dp->d_dump;
|
|
gkd->di.priv = dp;
|
|
gkd->di.blocksize = dp->d_sectorsize;
|
|
gkd->di.maxiosize = dp->d_maxsize;
|
|
gkd->di.mediaoffset = gkd->offset;
|
|
if ((gkd->offset + gkd->length) > dp->d_mediasize)
|
|
gkd->length = dp->d_mediasize - gkd->offset;
|
|
gkd->di.mediasize = gkd->length;
|
|
g_io_deliver(bp, 0);
|
|
}
|
|
|
|
static void
|
|
g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
|
|
{
|
|
const char *cmd;
|
|
|
|
memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
|
|
if (sc->led[0] != 0) {
|
|
switch (sc->state) {
|
|
case G_STATE_FAILED:
|
|
cmd = "1";
|
|
break;
|
|
case G_STATE_REBUILD:
|
|
cmd = "f5";
|
|
break;
|
|
case G_STATE_RESYNC:
|
|
cmd = "f1";
|
|
break;
|
|
default:
|
|
cmd = "0";
|
|
break;
|
|
}
|
|
led_set(sc->led, cmd);
|
|
}
|
|
g_io_deliver(bp, 0);
|
|
}
|
|
|
|
static void
|
|
g_disk_done(struct bio *bp)
|
|
{
|
|
struct bintime now;
|
|
struct bio *bp2;
|
|
struct g_disk_softc *sc;
|
|
|
|
/* See "notes" for why we need a mutex here */
|
|
sc = bp->bio_caller1;
|
|
bp2 = bp->bio_parent;
|
|
binuptime(&now);
|
|
mtx_lock(&sc->done_mtx);
|
|
if (bp2->bio_error == 0)
|
|
bp2->bio_error = bp->bio_error;
|
|
bp2->bio_completed += bp->bio_length - bp->bio_resid;
|
|
|
|
if (bp->bio_cmd == BIO_READ)
|
|
kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done");
|
|
|
|
switch (bp->bio_cmd) {
|
|
case BIO_ZONE:
|
|
bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
|
|
/*FALLTHROUGH*/
|
|
case BIO_READ:
|
|
case BIO_WRITE:
|
|
case BIO_DELETE:
|
|
case BIO_FLUSH:
|
|
devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
bp2->bio_inbed++;
|
|
if (bp2->bio_children == bp2->bio_inbed) {
|
|
mtx_unlock(&sc->done_mtx);
|
|
bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
|
|
g_io_deliver(bp2, bp2->bio_error);
|
|
} else
|
|
mtx_unlock(&sc->done_mtx);
|
|
g_destroy_bio(bp);
|
|
}
|
|
|
|
static int
|
|
g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
|
|
{
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
|
|
sc = pp->private;
|
|
dp = sc->dp;
|
|
KASSERT(dp != NULL && !dp->d_destroyed,
|
|
("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name));
|
|
|
|
if (dp->d_ioctl == NULL)
|
|
return (ENOIOCTL);
|
|
return (dp->d_ioctl(dp, cmd, data, fflag, td));
|
|
}
|
|
|
|
static off_t
|
|
g_disk_maxsize(struct disk *dp, struct bio *bp)
|
|
{
|
|
if (bp->bio_cmd == BIO_DELETE)
|
|
return (dp->d_delmaxsize);
|
|
return (dp->d_maxsize);
|
|
}
|
|
|
|
static int
|
|
g_disk_maxsegs(struct disk *dp, struct bio *bp)
|
|
{
|
|
return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
|
|
}
|
|
|
|
static void
|
|
g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
|
|
{
|
|
|
|
bp->bio_offset += off;
|
|
bp->bio_length -= off;
|
|
|
|
if ((bp->bio_flags & BIO_VLIST) != 0) {
|
|
bus_dma_segment_t *seg, *end;
|
|
|
|
seg = (bus_dma_segment_t *)bp->bio_data;
|
|
end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
|
|
off += bp->bio_ma_offset;
|
|
while (off >= seg->ds_len) {
|
|
KASSERT((seg != end),
|
|
("vlist request runs off the end"));
|
|
off -= seg->ds_len;
|
|
seg++;
|
|
}
|
|
bp->bio_ma_offset = off;
|
|
bp->bio_ma_n = end - seg;
|
|
bp->bio_data = (void *)seg;
|
|
} else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
|
|
bp->bio_ma += off / PAGE_SIZE;
|
|
bp->bio_ma_offset += off;
|
|
bp->bio_ma_offset %= PAGE_SIZE;
|
|
bp->bio_ma_n -= off / PAGE_SIZE;
|
|
} else {
|
|
bp->bio_data += off;
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
|
|
off_t *plength, int *ppages)
|
|
{
|
|
uintptr_t seg_page_base;
|
|
uintptr_t seg_page_end;
|
|
off_t offset;
|
|
off_t length;
|
|
int seg_pages;
|
|
|
|
offset = *poffset;
|
|
length = *plength;
|
|
|
|
if (length > seg->ds_len - offset)
|
|
length = seg->ds_len - offset;
|
|
|
|
seg_page_base = trunc_page(seg->ds_addr + offset);
|
|
seg_page_end = round_page(seg->ds_addr + offset + length);
|
|
seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
|
|
|
|
if (seg_pages > *ppages) {
|
|
seg_pages = *ppages;
|
|
length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
|
|
(seg->ds_addr + offset);
|
|
}
|
|
|
|
*poffset = 0;
|
|
*plength -= length;
|
|
*ppages -= seg_pages;
|
|
}
|
|
|
|
static off_t
|
|
g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
|
|
{
|
|
bus_dma_segment_t *seg, *end __diagused;
|
|
off_t residual;
|
|
off_t offset;
|
|
int pages;
|
|
|
|
seg = (bus_dma_segment_t *)bp->bio_data;
|
|
end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
|
|
residual = bp->bio_length;
|
|
offset = bp->bio_ma_offset;
|
|
pages = g_disk_maxsegs(dp, bp);
|
|
while (residual != 0 && pages != 0) {
|
|
KASSERT((seg != end),
|
|
("vlist limit runs off the end"));
|
|
g_disk_seg_limit(seg, &offset, &residual, &pages);
|
|
seg++;
|
|
}
|
|
if (pendseg != NULL)
|
|
*pendseg = seg;
|
|
return (residual);
|
|
}
|
|
|
|
static bool
|
|
g_disk_limit(struct disk *dp, struct bio *bp)
|
|
{
|
|
bool limited = false;
|
|
off_t maxsz;
|
|
|
|
maxsz = g_disk_maxsize(dp, bp);
|
|
|
|
/*
|
|
* XXX: If we have a stripesize we should really use it here.
|
|
* Care should be taken in the delete case if this is done
|
|
* as deletes can be very sensitive to size given how they
|
|
* are processed.
|
|
*/
|
|
if (bp->bio_length > maxsz) {
|
|
bp->bio_length = maxsz;
|
|
limited = true;
|
|
}
|
|
|
|
if ((bp->bio_flags & BIO_VLIST) != 0) {
|
|
bus_dma_segment_t *firstseg, *endseg;
|
|
off_t residual;
|
|
|
|
firstseg = (bus_dma_segment_t*)bp->bio_data;
|
|
residual = g_disk_vlist_limit(dp, bp, &endseg);
|
|
if (residual != 0) {
|
|
bp->bio_ma_n = endseg - firstseg;
|
|
bp->bio_length -= residual;
|
|
limited = true;
|
|
}
|
|
} else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
|
|
bp->bio_ma_n =
|
|
howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
|
|
}
|
|
|
|
return (limited);
|
|
}
|
|
|
|
static void
|
|
g_disk_start(struct bio *bp)
|
|
{
|
|
struct bio *bp2, *bp3;
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
int error;
|
|
off_t off;
|
|
|
|
biotrack(bp, __func__);
|
|
|
|
sc = bp->bio_to->private;
|
|
dp = sc->dp;
|
|
KASSERT(dp != NULL && !dp->d_destroyed,
|
|
("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name));
|
|
error = EJUSTRETURN;
|
|
switch(bp->bio_cmd) {
|
|
case BIO_DELETE:
|
|
if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
/* fall-through */
|
|
case BIO_READ:
|
|
case BIO_WRITE:
|
|
KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
|
|
(bp->bio_flags & BIO_UNMAPPED) == 0,
|
|
("unmapped bio not supported by disk %s", dp->d_name));
|
|
|
|
if (bp->bio_cmd == BIO_WRITE)
|
|
kmsan_check_bio(bp, "g_disk_start");
|
|
|
|
off = 0;
|
|
bp3 = NULL;
|
|
bp2 = g_clone_bio(bp);
|
|
if (bp2 == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
for (;;) {
|
|
if (g_disk_limit(dp, bp2)) {
|
|
off += bp2->bio_length;
|
|
|
|
/*
|
|
* To avoid a race, we need to grab the next bio
|
|
* before we schedule this one. See "notes".
|
|
*/
|
|
bp3 = g_clone_bio(bp);
|
|
if (bp3 == NULL)
|
|
bp->bio_error = ENOMEM;
|
|
}
|
|
bp2->bio_done = g_disk_done;
|
|
bp2->bio_caller1 = sc;
|
|
bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
|
|
bp2->bio_bcount = bp2->bio_length;
|
|
bp2->bio_disk = dp;
|
|
devstat_start_transaction_bio(dp->d_devstat, bp2);
|
|
dp->d_strategy(bp2);
|
|
|
|
if (bp3 == NULL)
|
|
break;
|
|
|
|
bp2 = bp3;
|
|
bp3 = NULL;
|
|
g_disk_advance(dp, bp2, off);
|
|
}
|
|
break;
|
|
case BIO_GETATTR:
|
|
/* Give the driver a chance to override */
|
|
if (dp->d_getattr != NULL) {
|
|
if (bp->bio_disk == NULL)
|
|
bp->bio_disk = dp;
|
|
error = dp->d_getattr(bp);
|
|
if (error != -1)
|
|
break;
|
|
error = EJUSTRETURN;
|
|
}
|
|
if (g_handleattr_int(bp, "GEOM::candelete",
|
|
(dp->d_flags & DISKFLAG_CANDELETE) != 0))
|
|
break;
|
|
else if (g_handleattr_int(bp, "GEOM::fwsectors",
|
|
dp->d_fwsectors))
|
|
break;
|
|
else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
|
|
break;
|
|
else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
|
|
break;
|
|
else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
|
|
break;
|
|
else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
|
|
dp->d_hba_vendor))
|
|
break;
|
|
else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
|
|
dp->d_hba_device))
|
|
break;
|
|
else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
|
|
dp->d_hba_subvendor))
|
|
break;
|
|
else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
|
|
dp->d_hba_subdevice))
|
|
break;
|
|
else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
|
|
g_disk_kerneldump(bp, dp);
|
|
else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
|
|
g_disk_setstate(bp, sc);
|
|
else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
|
|
dp->d_rotation_rate))
|
|
break;
|
|
else if (g_handleattr_str(bp, "GEOM::attachment",
|
|
dp->d_attachment))
|
|
break;
|
|
else
|
|
error = ENOIOCTL;
|
|
break;
|
|
case BIO_FLUSH:
|
|
g_trace(G_T_BIO, "g_disk_flushcache(%s)",
|
|
bp->bio_to->name);
|
|
if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
/*FALLTHROUGH*/
|
|
case BIO_ZONE:
|
|
if (bp->bio_cmd == BIO_ZONE) {
|
|
if (!(dp->d_flags & DISKFLAG_CANZONE)) {
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
g_trace(G_T_BIO, "g_disk_zone(%s)",
|
|
bp->bio_to->name);
|
|
}
|
|
bp2 = g_clone_bio(bp);
|
|
if (bp2 == NULL) {
|
|
g_io_deliver(bp, ENOMEM);
|
|
return;
|
|
}
|
|
bp2->bio_done = g_disk_done;
|
|
bp2->bio_caller1 = sc;
|
|
bp2->bio_disk = dp;
|
|
devstat_start_transaction_bio(dp->d_devstat, bp2);
|
|
dp->d_strategy(bp2);
|
|
break;
|
|
case BIO_SPEEDUP:
|
|
bp2 = g_clone_bio(bp);
|
|
if (bp2 == NULL) {
|
|
g_io_deliver(bp, ENOMEM);
|
|
return;
|
|
}
|
|
bp2->bio_done = g_disk_done;
|
|
bp2->bio_caller1 = sc;
|
|
bp2->bio_disk = dp;
|
|
dp->d_strategy(bp2);
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
if (error != EJUSTRETURN)
|
|
g_io_deliver(bp, error);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
|
|
{
|
|
struct bio *bp;
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
char *buf;
|
|
int res = 0;
|
|
|
|
sc = gp->softc;
|
|
if (sc == NULL || (dp = sc->dp) == NULL)
|
|
return;
|
|
if (indent == NULL) {
|
|
sbuf_printf(sb, " hd %u", dp->d_fwheads);
|
|
sbuf_printf(sb, " sc %u", dp->d_fwsectors);
|
|
return;
|
|
}
|
|
if (pp != NULL) {
|
|
sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
|
|
indent, dp->d_fwheads);
|
|
sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
|
|
indent, dp->d_fwsectors);
|
|
|
|
/*
|
|
* "rotationrate" is a little complicated, because the value
|
|
* returned by the drive might not be the RPM; 0 and 1 are
|
|
* special cases, and there's also a valid range.
|
|
*/
|
|
sbuf_printf(sb, "%s<rotationrate>", indent);
|
|
if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
|
|
sbuf_cat(sb, "unknown"); /* don't report RPM. */
|
|
else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
|
|
sbuf_cat(sb, "0");
|
|
else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
|
|
(dp->d_rotation_rate <= DISK_RR_MAX))
|
|
sbuf_printf(sb, "%u", dp->d_rotation_rate);
|
|
else
|
|
sbuf_cat(sb, "invalid");
|
|
sbuf_cat(sb, "</rotationrate>\n");
|
|
if (dp->d_getattr != NULL) {
|
|
buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
|
|
bp = g_alloc_bio();
|
|
bp->bio_disk = dp;
|
|
bp->bio_attribute = "GEOM::ident";
|
|
bp->bio_length = DISK_IDENT_SIZE;
|
|
bp->bio_data = buf;
|
|
res = dp->d_getattr(bp);
|
|
sbuf_printf(sb, "%s<ident>", indent);
|
|
g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident);
|
|
sbuf_cat(sb, "</ident>\n");
|
|
bp->bio_attribute = "GEOM::lunid";
|
|
bp->bio_length = DISK_IDENT_SIZE;
|
|
bp->bio_data = buf;
|
|
if (dp->d_getattr(bp) == 0) {
|
|
sbuf_printf(sb, "%s<lunid>", indent);
|
|
g_conf_cat_escaped(sb, buf);
|
|
sbuf_cat(sb, "</lunid>\n");
|
|
}
|
|
bp->bio_attribute = "GEOM::lunname";
|
|
bp->bio_length = DISK_IDENT_SIZE;
|
|
bp->bio_data = buf;
|
|
if (dp->d_getattr(bp) == 0) {
|
|
sbuf_printf(sb, "%s<lunname>", indent);
|
|
g_conf_cat_escaped(sb, buf);
|
|
sbuf_cat(sb, "</lunname>\n");
|
|
}
|
|
g_destroy_bio(bp);
|
|
g_free(buf);
|
|
} else {
|
|
sbuf_printf(sb, "%s<ident>", indent);
|
|
g_conf_cat_escaped(sb, dp->d_ident);
|
|
sbuf_cat(sb, "</ident>\n");
|
|
}
|
|
sbuf_printf(sb, "%s<descr>", indent);
|
|
g_conf_cat_escaped(sb, dp->d_descr);
|
|
sbuf_cat(sb, "</descr>\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_disk_resize(void *ptr, int flag)
|
|
{
|
|
struct disk *dp;
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
g_topology_assert();
|
|
|
|
dp = ptr;
|
|
gp = dp->d_geom;
|
|
|
|
if (dp->d_destroyed || gp == NULL)
|
|
return;
|
|
|
|
LIST_FOREACH(pp, &gp->provider, provider) {
|
|
if (pp->sectorsize != 0 &&
|
|
pp->sectorsize != dp->d_sectorsize)
|
|
g_wither_provider(pp, ENXIO);
|
|
else
|
|
g_resize_provider(pp, dp->d_mediasize);
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_disk_create(void *arg, int flag)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
struct disk_alias *dap;
|
|
char tmpstr[80];
|
|
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
g_topology_assert();
|
|
dp = arg;
|
|
|
|
mtx_pool_lock(mtxpool_sleep, dp);
|
|
dp->d_init_level = DISK_INIT_START;
|
|
|
|
/*
|
|
* If the disk has already gone away, we can just stop here and
|
|
* call the user's callback to tell him we've cleaned things up.
|
|
*/
|
|
if (dp->d_goneflag != 0) {
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
if (dp->d_gone != NULL)
|
|
dp->d_gone(dp);
|
|
return;
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
|
|
sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
|
|
mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
|
|
sc->dp = dp;
|
|
if (dp->d_devstat == NULL) {
|
|
dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
|
|
dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
|
|
DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
|
|
}
|
|
sc->d_devstat = dp->d_devstat;
|
|
gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
|
|
gp->softc = sc;
|
|
pp = g_new_providerf(gp, "%s", gp->name);
|
|
LIST_FOREACH(dap, &dp->d_aliases, da_next)
|
|
g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit);
|
|
devstat_remove_entry(pp->stat);
|
|
pp->stat = NULL;
|
|
dp->d_devstat->id = pp;
|
|
pp->mediasize = dp->d_mediasize;
|
|
pp->sectorsize = dp->d_sectorsize;
|
|
pp->stripeoffset = dp->d_stripeoffset;
|
|
pp->stripesize = dp->d_stripesize;
|
|
if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
|
|
pp->flags |= G_PF_ACCEPT_UNMAPPED;
|
|
if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
|
|
pp->flags |= G_PF_DIRECT_SEND;
|
|
pp->flags |= G_PF_DIRECT_RECEIVE;
|
|
if (bootverbose)
|
|
printf("GEOM: new disk %s\n", gp->name);
|
|
sysctl_ctx_init(&sc->sysctl_ctx);
|
|
snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
|
|
sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
|
|
SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
|
|
CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr);
|
|
if (sc->sysctl_tree != NULL) {
|
|
SYSCTL_ADD_STRING(&sc->sysctl_ctx,
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
|
|
CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
|
|
"LED name");
|
|
SYSCTL_ADD_PROC(&sc->sysctl_ctx,
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags",
|
|
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0,
|
|
g_disk_sysctl_flags, "A", "Report disk flags");
|
|
}
|
|
pp->private = sc;
|
|
dp->d_geom = gp;
|
|
g_error_provider(pp, 0);
|
|
|
|
mtx_pool_lock(mtxpool_sleep, dp);
|
|
dp->d_init_level = DISK_INIT_DONE;
|
|
|
|
/*
|
|
* If the disk has gone away at this stage, start the withering
|
|
* process for it.
|
|
*/
|
|
if (dp->d_goneflag != 0) {
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
g_wither_provider(pp, ENXIO);
|
|
return;
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
|
|
}
|
|
|
|
/*
|
|
* We get this callback after all of the consumers have gone away, and just
|
|
* before the provider is freed. If the disk driver provided a d_gone
|
|
* callback, let them know that it is okay to free resources -- they won't
|
|
* be getting any more accesses from GEOM.
|
|
*/
|
|
static void
|
|
g_disk_providergone(struct g_provider *pp)
|
|
{
|
|
struct disk *dp;
|
|
struct g_disk_softc *sc;
|
|
|
|
sc = (struct g_disk_softc *)pp->private;
|
|
dp = sc->dp;
|
|
if (dp != NULL && dp->d_gone != NULL)
|
|
dp->d_gone(dp);
|
|
if (sc->sysctl_tree != NULL) {
|
|
sysctl_ctx_free(&sc->sysctl_ctx);
|
|
sc->sysctl_tree = NULL;
|
|
}
|
|
if (sc->led[0] != 0) {
|
|
led_set(sc->led, "0");
|
|
sc->led[0] = 0;
|
|
}
|
|
pp->private = NULL;
|
|
pp->geom->softc = NULL;
|
|
mtx_destroy(&sc->done_mtx);
|
|
g_free(sc);
|
|
}
|
|
|
|
static void
|
|
g_disk_destroy(void *ptr, int flag)
|
|
{
|
|
struct disk *dp;
|
|
struct g_geom *gp;
|
|
struct g_disk_softc *sc;
|
|
struct disk_alias *dap, *daptmp;
|
|
|
|
g_topology_assert();
|
|
dp = ptr;
|
|
gp = dp->d_geom;
|
|
if (gp != NULL) {
|
|
sc = gp->softc;
|
|
if (sc != NULL)
|
|
sc->dp = NULL;
|
|
dp->d_geom = NULL;
|
|
g_wither_geom(gp, ENXIO);
|
|
}
|
|
LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
|
|
g_free(dap);
|
|
|
|
g_free(dp);
|
|
}
|
|
|
|
/*
|
|
* We only allow printable characters in disk ident,
|
|
* the rest is converted to 'x<HH>'.
|
|
*/
|
|
static void
|
|
g_disk_ident_adjust(char *ident, size_t size)
|
|
{
|
|
char *p, tmp[4], newid[DISK_IDENT_SIZE];
|
|
|
|
newid[0] = '\0';
|
|
for (p = ident; *p != '\0'; p++) {
|
|
if (isprint(*p)) {
|
|
tmp[0] = *p;
|
|
tmp[1] = '\0';
|
|
} else {
|
|
snprintf(tmp, sizeof(tmp), "x%02hhx",
|
|
*(unsigned char *)p);
|
|
}
|
|
if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
|
|
break;
|
|
}
|
|
bzero(ident, size);
|
|
strlcpy(ident, newid, size);
|
|
}
|
|
|
|
struct disk *
|
|
disk_alloc(void)
|
|
{
|
|
struct disk *dp;
|
|
|
|
dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO);
|
|
LIST_INIT(&dp->d_aliases);
|
|
dp->d_init_level = DISK_INIT_NONE;
|
|
dp->d_cevent = g_alloc_event(M_WAITOK);
|
|
dp->d_devent = g_alloc_event(M_WAITOK);
|
|
return (dp);
|
|
}
|
|
|
|
void
|
|
disk_create(struct disk *dp, int version)
|
|
{
|
|
|
|
if (version != DISK_VERSION) {
|
|
printf("WARNING: Attempt to add disk %s%d %s",
|
|
dp->d_name, dp->d_unit,
|
|
" using incompatible ABI version of disk(9)\n");
|
|
printf("WARNING: Ignoring disk %s%d\n",
|
|
dp->d_name, dp->d_unit);
|
|
return;
|
|
}
|
|
if (dp->d_flags & DISKFLAG_RESERVED) {
|
|
printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
|
|
dp->d_name, dp->d_unit);
|
|
printf("WARNING: Ignoring disk %s%d\n",
|
|
dp->d_name, dp->d_unit);
|
|
return;
|
|
}
|
|
KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
|
|
KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
|
|
KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
|
|
KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
|
|
g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
|
|
|
|
dp->d_init_level = DISK_INIT_CREATE;
|
|
|
|
KASSERT(dp->d_cevent != NULL,
|
|
("Disk create for %p with event NULL", dp));
|
|
g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL);
|
|
}
|
|
|
|
void
|
|
disk_destroy(struct disk *dp)
|
|
{
|
|
struct disk_alias *dap, *daptmp;
|
|
|
|
/* If disk_create() was never called, just free the resources. */
|
|
if (dp->d_init_level < DISK_INIT_CREATE) {
|
|
if (dp->d_devstat != NULL)
|
|
devstat_remove_entry(dp->d_devstat);
|
|
LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp)
|
|
g_free(dap);
|
|
g_free(dp->d_cevent);
|
|
g_free(dp->d_devent);
|
|
g_free(dp);
|
|
return;
|
|
}
|
|
|
|
KASSERT(dp->d_devent != NULL,
|
|
("Disk destroy for %p with event NULL", dp));
|
|
disk_gone(dp);
|
|
dp->d_destroyed = 1;
|
|
g_cancel_event(dp);
|
|
if (dp->d_devstat != NULL)
|
|
devstat_remove_entry(dp->d_devstat);
|
|
g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL);
|
|
}
|
|
|
|
void
|
|
disk_add_alias(struct disk *dp, const char *name)
|
|
{
|
|
struct disk_alias *dap;
|
|
|
|
dap = (struct disk_alias *)g_malloc(
|
|
sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK);
|
|
strcpy((char *)(dap + 1), name);
|
|
dap->da_alias = (const char *)(dap + 1);
|
|
LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next);
|
|
}
|
|
|
|
void
|
|
disk_gone(struct disk *dp)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
|
|
mtx_pool_lock(mtxpool_sleep, dp);
|
|
|
|
/*
|
|
* Second wither call makes no sense, plus we can not access the list
|
|
* of providers without topology lock after calling wither once.
|
|
*/
|
|
if (dp->d_goneflag != 0) {
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
return;
|
|
}
|
|
|
|
dp->d_goneflag = 1;
|
|
|
|
/*
|
|
* If we're still in the process of creating this disk (the
|
|
* g_disk_create() function is still queued, or is in
|
|
* progress), the init level will not yet be DISK_INIT_DONE.
|
|
*
|
|
* If that is the case, g_disk_create() will see d_goneflag
|
|
* and take care of cleaning things up.
|
|
*
|
|
* If the disk has already been created, we default to
|
|
* withering the provider as usual below.
|
|
*
|
|
* If the caller has not set a d_gone() callback, he will
|
|
* not be any worse off by returning here, because the geom
|
|
* has not been fully setup in any case.
|
|
*/
|
|
if (dp->d_init_level < DISK_INIT_DONE) {
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
return;
|
|
}
|
|
mtx_pool_unlock(mtxpool_sleep, dp);
|
|
|
|
gp = dp->d_geom;
|
|
pp = LIST_FIRST(&gp->provider);
|
|
if (pp != NULL) {
|
|
KASSERT(LIST_NEXT(pp, provider) == NULL,
|
|
("geom %p has more than one provider", gp));
|
|
g_wither_provider(pp, ENXIO);
|
|
}
|
|
}
|
|
|
|
void
|
|
disk_attr_changed(struct disk *dp, const char *attr, int flag)
|
|
{
|
|
struct g_geom *gp = dp->d_geom;
|
|
struct g_provider *pp;
|
|
char devnamebuf[128];
|
|
|
|
if (gp == NULL)
|
|
return;
|
|
LIST_FOREACH(pp, &gp->provider, provider)
|
|
(void)g_attr_changed(pp, attr, flag);
|
|
snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
|
|
dp->d_unit);
|
|
devctl_notify("GEOM", "disk", attr, devnamebuf);
|
|
}
|
|
|
|
void
|
|
disk_media_changed(struct disk *dp, int flag)
|
|
{
|
|
struct g_geom *gp = dp->d_geom;
|
|
struct g_provider *pp;
|
|
|
|
if (gp == NULL)
|
|
return;
|
|
pp = LIST_FIRST(&gp->provider);
|
|
if (pp != NULL) {
|
|
KASSERT(LIST_NEXT(pp, provider) == NULL,
|
|
("geom %p has more than one provider", gp));
|
|
g_media_changed(pp, flag);
|
|
}
|
|
}
|
|
|
|
void
|
|
disk_media_gone(struct disk *dp, int flag)
|
|
{
|
|
struct g_geom *gp = dp->d_geom;
|
|
struct g_provider *pp;
|
|
|
|
if (gp == NULL)
|
|
return;
|
|
pp = LIST_FIRST(&gp->provider);
|
|
if (pp != NULL) {
|
|
KASSERT(LIST_NEXT(pp, provider) == NULL,
|
|
("geom %p has more than one provider", gp));
|
|
g_media_gone(pp, flag);
|
|
}
|
|
}
|
|
|
|
int
|
|
disk_resize(struct disk *dp, int flag)
|
|
{
|
|
|
|
if (dp->d_destroyed || dp->d_geom == NULL)
|
|
return (0);
|
|
|
|
return (g_post_event(g_disk_resize, dp, flag, NULL));
|
|
}
|
|
|
|
static void
|
|
g_kern_disks(void *p, int flag __unused)
|
|
{
|
|
struct sbuf *sb;
|
|
struct g_geom *gp;
|
|
char *sp;
|
|
|
|
sb = p;
|
|
sp = "";
|
|
g_topology_assert();
|
|
LIST_FOREACH(gp, &g_disk_class.geom, geom) {
|
|
sbuf_printf(sb, "%s%s", sp, gp->name);
|
|
sp = " ";
|
|
}
|
|
sbuf_finish(sb);
|
|
}
|
|
|
|
static int
|
|
g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct disk *dp;
|
|
struct sbuf *sb;
|
|
int error;
|
|
|
|
sb = sbuf_new_auto();
|
|
dp = (struct disk *)arg1;
|
|
sbuf_printf(sb, "%b", dp->d_flags,
|
|
"\20"
|
|
"\2OPEN"
|
|
"\3CANDELETE"
|
|
"\4CANFLUSHCACHE"
|
|
"\5UNMAPPEDBIO"
|
|
"\6DIRECTCOMPLETION"
|
|
"\10CANZONE"
|
|
"\11WRITEPROTECT");
|
|
|
|
sbuf_finish(sb);
|
|
error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
|
|
sbuf_delete(sb);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_disks(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
struct sbuf *sb;
|
|
|
|
sb = sbuf_new_auto();
|
|
g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
|
|
error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
|
|
sbuf_delete(sb);
|
|
return error;
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, disks,
|
|
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
|
|
sysctl_disks, "A", "names of available disks");
|