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Merge commit 'refs/top-bases/linux-configure-branch' into linux-configure-branch

This commit is contained in:
Brian Behlendorf 2009-01-08 10:29:29 -08:00
parent 3af97a3552 6066cb21f1
commit 62ce1a5d0e
3 changed files with 146 additions and 232 deletions
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1
lib/libzpool/Makefile.am
View File

@ -67,7 +67,6 @@ libzpool_la_SOURCES = \
${top_srcdir}/module/zfs/unique.c \ ${top_srcdir}/module/zfs/unique.c \
${top_srcdir}/module/zfs/vdev.c \ ${top_srcdir}/module/zfs/vdev.c \
${top_srcdir}/module/zfs/vdev_cache.c \ ${top_srcdir}/module/zfs/vdev_cache.c \
${top_srcdir}/module/zfs/vdev_disk.c \
${top_srcdir}/module/zfs/vdev_file.c \ ${top_srcdir}/module/zfs/vdev_file.c \
${top_srcdir}/module/zfs/vdev_label.c \ ${top_srcdir}/module/zfs/vdev_label.c \
${top_srcdir}/module/zfs/vdev_missing.c \ ${top_srcdir}/module/zfs/vdev_missing.c \

1
module/zfs/Makefile.in
View File

@ -49,6 +49,7 @@ ${MODULE}-objs += uberblock.o
${MODULE}-objs += unique.o ${MODULE}-objs += unique.o
${MODULE}-objs += vdev.o ${MODULE}-objs += vdev.o
${MODULE}-objs += vdev_cache.o ${MODULE}-objs += vdev_cache.o
${MODULE}-objs += vdev_disk.o
${MODULE}-objs += vdev_file.o ${MODULE}-objs += vdev_file.o
${MODULE}-objs += vdev_label.o ${MODULE}-objs += vdev_label.o
${MODULE}-objs += vdev_mirror.o ${MODULE}-objs += vdev_mirror.o

376
module/zfs/vdev_disk.c
View File

@ -23,8 +23,6 @@
* Use is subject to license terms. * Use is subject to license terms.
*/ */
#if defined(_KERNEL)
#include <sys/zfs_context.h> #include <sys/zfs_context.h>
#include <sys/spa.h> #include <sys/spa.h>
#include <sys/vdev_disk.h> #include <sys/vdev_disk.h>
@ -36,14 +34,11 @@
/* /*
* Virtual device vector for disks. * Virtual device vector for disks.
*/ */
/* FIXME: A slab entry for these would probably be good */
typedef struct dio_request { typedef struct dio_request {
struct completion dr_comp; struct completion dr_comp;
atomic_t dr_ref; atomic_t dr_ref;
vdev_t *dr_vd;
zio_t *dr_zio; zio_t *dr_zio;
int dr_rc; int dr_error;
} dio_request_t; } dio_request_t;
static int static int
@ -53,8 +48,6 @@ vdev_disk_open_common(vdev_t *vd)
struct block_device *bdev; struct block_device *bdev;
int mode = 0; int mode = 0;
// dprintf("vd=%p\n", vd);
/* Must have a pathname and it must be absolute. */ /* Must have a pathname and it must be absolute. */
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') { if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL; vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
@ -65,13 +58,13 @@ vdev_disk_open_common(vdev_t *vd)
if (dvd == NULL) if (dvd == NULL)
return ENOMEM; return ENOMEM;
/* FIXME: Since we do not have devid support like Solaris we /* XXX: Since we do not have devid support like Solaris we
* currently can't be as clever about opening the right device. * currently can't be as clever about opening the right device.
* For now we will simple open the device name provided and * For now we will simply open the device name provided and
* fail when it doesn't exist. If your devices get reordered * fail when it doesn't exist. If your devices get reordered
* your going to be screwed, use udev for now to prevent this. * your going to be screwed, use udev for now to prevent this.
* *
* FIXME: mode here could be the global spa_mode with a little * XXX: mode here could be the global spa_mode with a little
* munging of the flags to make then more agreeable to linux. * munging of the flags to make then more agreeable to linux.
* However, simply passing a 0 for now gets us W/R behavior. * However, simply passing a 0 for now gets us W/R behavior.
*/ */
@ -81,8 +74,8 @@ vdev_disk_open_common(vdev_t *vd)
return -PTR_ERR(bdev); return -PTR_ERR(bdev);
} }
/* FIXME: Long term validate stored dvd->vd_devid with /* XXX: Long term validate stored dvd->vd_devid with a unique
* a unique identifier read from the disk. * identifier read from the disk.
*/ */
dvd->vd_lh = bdev; dvd->vd_lh = bdev;
@ -96,46 +89,44 @@ vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
{ {
vdev_disk_t *dvd; vdev_disk_t *dvd;
struct block_device *bdev; struct block_device *bdev;
int rc; int error;
// dprintf("vd=%p, psize=%p, ashift=%p\n", vd, psize, ashift); error = vdev_disk_open_common(vd);
dprintf("adding disk %s\n", if (error)
vd->vdev_path ? vd->vdev_path : "<none>"); return error;
rc = vdev_disk_open_common(vd);
if (rc)
return rc;
dvd = vd->vdev_tsd; dvd = vd->vdev_tsd;
bdev = dvd->vd_lh; bdev = dvd->vd_lh;
/* Determine the actual size of the device (in bytes) */ /* Determine the actual size of the device (in bytes)
*
* XXX: SECTOR_SIZE is defined to 512b which may not be true for
* your device, we must use the actual hardware sector size.
*/
*psize = get_capacity(bdev->bd_disk) * SECTOR_SIZE; *psize = get_capacity(bdev->bd_disk) * SECTOR_SIZE;
/* Check if this is a whole device and if it is try and /* Check if this is a whole device and if it is try and
* enable the write cache, it is OK if this fails. * enable the write cache, it is OK if this fails. */
*
* FIXME: This behavior should probably be configurable.
*/
if (bdev->bd_contains == bdev) { if (bdev->bd_contains == bdev) {
int wce = 1; int wce = 1;
vd->vdev_wholedisk = 1ULL; vd->vdev_wholedisk = 1ULL;
/* Different methods are needed for an IDE vs SCSI disk. /* XXX: Different methods are needed for an IDE vs SCSI disk.
* Since we're not sure what type of disk this is try IDE, * Since we're not sure what type of disk this is try IDE,
* if that fails try SCSI. */ * if that fails try SCSI.
rc = ioctl_by_bdev(bdev, HDIO_SET_WCACHE, (unsigned long)&wce); */
if (rc) error = ioctl_by_bdev(bdev, HDIO_SET_WCACHE, (unsigned long)&wce);
if (error)
dprintf("Unable to enable IDE WCE and SCSI WCE " dprintf("Unable to enable IDE WCE and SCSI WCE "
"not yet supported: %d\n", rc); "not yet supported: %d\n", error);
/* FIXME: To implement the scsi WCE enable we are going to need /* XXX: To implement the scsi WCE enable we are going to need
* to use the SG_IO ioctl. But that means fully forming the * to use the SG_IO ioctl. But that means fully forming the
* SCSI command as the ioctl arg. To get this right I need * SCSI command as the ioctl arg. To get this right I need
* to look at the sdparm source which does this. * to look at the sdparm source which does this.
*/ */
rc = 0; error = 0;
} else { } else {
/* Must be a partition, that's fine. */ /* Must be a partition, that's fine. */
vd->vdev_wholedisk = 0; vd->vdev_wholedisk = 0;
@ -147,7 +138,7 @@ vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
/* Clear the nowritecache bit, causes vdev_reopen() to try again. */ /* Clear the nowritecache bit, causes vdev_reopen() to try again. */
vd->vdev_nowritecache = B_FALSE; vd->vdev_nowritecache = B_FALSE;
return rc; return error;
} }
static void static void
@ -155,14 +146,11 @@ vdev_disk_close(vdev_t *vd)
{ {
vdev_disk_t *dvd = vd->vdev_tsd; vdev_disk_t *dvd = vd->vdev_tsd;
// dprintf("vd=%p\n", vd);
dprintf("removing disk %s\n",
vd->vdev_path ? vd->vdev_path : "<none>");
if (dvd == NULL) if (dvd == NULL)
return; return;
close_bdev_excl(dvd->vd_lh); if (dvd->vd_lh != NULL)
close_bdev_excl(dvd->vd_lh);
kmem_free(dvd, sizeof(vdev_disk_t)); kmem_free(dvd, sizeof(vdev_disk_t));
vd->vdev_tsd = NULL; vd->vdev_tsd = NULL;
@ -170,17 +158,16 @@ vdev_disk_close(vdev_t *vd)
#ifdef HAVE_2ARGS_BIO_END_IO_T #ifdef HAVE_2ARGS_BIO_END_IO_T
static void static void
vdev_disk_probe_io_completion(struct bio *bio, int rc) vdev_disk_physio_completion(struct bio *bio, int rc)
#else #else
static int static int
vdev_disk_probe_io_completion(struct bio *bio, unsigned int size, int rc) vdev_disk_physio_completion(struct bio *bio, unsigned int size, int rc)
#endif /* HAVE_2ARGS_BIO_END_IO_T */ #endif /* HAVE_2ARGS_BIO_END_IO_T */
{ {
dio_request_t *dr = bio->bi_private; dio_request_t *dr = bio->bi_private;
zio_t *zio; zio_t *zio;
int error; int error;
/* Fatal error but print some useful debugging before asserting */ /* Fatal error but print some useful debugging before asserting */
if (dr == NULL) { if (dr == NULL) {
printk("FATAL: bio->bi_private == NULL\n" printk("FATAL: bio->bi_private == NULL\n"
@ -208,7 +195,7 @@ vdev_disk_probe_io_completion(struct bio *bio, unsigned int size, int rc)
zio_interrupt(zio); zio_interrupt(zio);
} }
dr->dr_rc = error; dr->dr_error = error;
atomic_dec(&dr->dr_ref); atomic_dec(&dr->dr_ref);
if (bio_sync(bio)) { if (bio_sync(bio)) {
@ -302,34 +289,24 @@ bio_map(struct request_queue *q, void *data, unsigned int len, gfp_t gfp_mask)
} }
static int static int
vdev_disk_io(vdev_t *vd, zio_t *zio, caddr_t kbuf, size_t size, __vdev_disk_physio(struct block_device *vd_lh, zio_t *zio, caddr_t kbuf,
uint64_t offset, int flags) size_t size, uint64_t offset, int flags)
{ {
struct bio *bio; struct bio *bio;
dio_request_t *dr; dio_request_t *dr;
int rw, rc = 0; int rw, error = 0;
struct block_device *bdev;
struct request_queue *q; struct request_queue *q;
// dprintf("vd=%p, zio=%p, kbuf=%p, size=%ld, offset=%lu, flag=%lx\n",
// vd, zio, kbuf, size, offset, flags);
ASSERT((offset % SECTOR_SIZE) == 0); /* Sector aligned */ ASSERT((offset % SECTOR_SIZE) == 0); /* Sector aligned */
if (vd == NULL || vd->vdev_tsd == NULL)
return EINVAL;
dr = kmem_alloc(sizeof(dio_request_t), KM_SLEEP); dr = kmem_alloc(sizeof(dio_request_t), KM_SLEEP);
if (dr == NULL) if (dr == NULL)
return ENOMEM; return ENOMEM;
atomic_set(&dr->dr_ref, 0); atomic_set(&dr->dr_ref, 0);
dr->dr_vd = vd;
dr->dr_zio = zio; dr->dr_zio = zio;
dr->dr_rc = 0; dr->dr_error = 0;
q = vd_lh->bd_disk->queue;
bdev = ((vdev_disk_t *)(vd->vdev_tsd))->vd_lh;
q = bdev->bd_disk->queue;
bio = bio_map(q, kbuf, size, GFP_NOIO); bio = bio_map(q, kbuf, size, GFP_NOIO);
if (IS_ERR(bio)) { if (IS_ERR(bio)) {
@ -337,9 +314,9 @@ vdev_disk_io(vdev_t *vd, zio_t *zio, caddr_t kbuf, size_t size,
return -PTR_ERR(bio); return -PTR_ERR(bio);
} }
bio->bi_bdev = bdev; bio->bi_bdev = vd_lh;
bio->bi_sector = offset / SECTOR_SIZE; bio->bi_sector = offset / SECTOR_SIZE;
bio->bi_end_io = vdev_disk_probe_io_completion; bio->bi_end_io = vdev_disk_physio_completion;
bio->bi_private = dr; bio->bi_private = dr;
init_completion(&dr->dr_comp); init_completion(&dr->dr_comp);
@ -354,7 +331,7 @@ vdev_disk_io(vdev_t *vd, zio_t *zio, caddr_t kbuf, size_t size,
rw |= 1 << BIO_RW_FAILFAST; rw |= 1 << BIO_RW_FAILFAST;
ASSERT3S(flags & ~((1 << BIO_RW) | (1 << BIO_RW_SYNC) | ASSERT3S(flags & ~((1 << BIO_RW) | (1 << BIO_RW_SYNC) |
(1 << BIO_RW_FAILFAST)), ==, 0); (1 << BIO_RW_FAILFAST)), ==, 0);
submit_bio(rw, bio); submit_bio(rw, bio);
@ -366,127 +343,29 @@ vdev_disk_io(vdev_t *vd, zio_t *zio, caddr_t kbuf, size_t size,
if (bio_sync(bio)) { if (bio_sync(bio)) {
wait_for_completion(&dr->dr_comp); wait_for_completion(&dr->dr_comp);
ASSERT(atomic_read(&dr->dr_ref) == 0); ASSERT(atomic_read(&dr->dr_ref) == 0);
rc = dr->dr_rc; error = dr->dr_error;
kmem_free(dr, sizeof(dio_request_t)); kmem_free(dr, sizeof(dio_request_t));
bio_put(bio); bio_put(bio);
} }
if (zio_injection_enabled && rc == 0) return error;
rc = zio_handle_device_injection(vd, EIO);
return rc;
} }
static int int
vdev_disk_probe_io(vdev_t *vd, caddr_t kbuf, size_t size, vdev_disk_physio(ldi_handle_t vd_lh, caddr_t kbuf,
uint64_t offset, int flags) size_t size, uint64_t offset, int flags)
{ {
int rc; return __vdev_disk_physio(vd_lh, NULL, kbuf, size, offset, flags);
// dprintf("vd=%p, kbuf=%p, size=%ld, offset=%lu, flag=%d\n",
// vd, kbuf, size, offset, flags);
flags |= (1 << BIO_RW_SYNC);
flags |= (1 << BIO_RW_FAILFAST);
/* FIXME: offset must be block aligned or we need to take
* care of it */
rc = vdev_disk_io(vd, NULL, kbuf, size, offset, flags);
return rc;
}
/*
* Determine if the underlying device is accessible by reading and writing
* to a known location. We must be able to do this during syncing context
* and thus we cannot set the vdev state directly.
*/
static int
vdev_disk_probe(vdev_t *vd)
{
vdev_t *nvd;
int label_idx, rc = 0, retries = 0;
uint64_t offset;
char *vl_pad;
// dprintf("vd=%p\n", vd);
if (vd == NULL)
return EINVAL;
/* Hijack the current vdev */
nvd = vd;
/* Pick a random label to rewrite */
label_idx = spa_get_random(VDEV_LABELS);
ASSERT(label_idx < VDEV_LABELS);
offset = vdev_label_offset(vd->vdev_psize, label_idx,
offsetof(vdev_label_t, vl_pad));
vl_pad = vmem_alloc(VDEV_SKIP_SIZE, KM_SLEEP);
if (vl_pad == NULL)
return ENOMEM;
/*
* Try to read and write to a special location on the
* label. We use the existing vdev initially and only
* try to create and reopen it if we encounter a failure.
*/
while ((rc = vdev_disk_probe_io(nvd, vl_pad,
VDEV_SKIP_SIZE, offset, READ)) != 0 && retries == 0) {
nvd = kmem_zalloc(sizeof(vdev_t), KM_SLEEP);
if (vd->vdev_path)
nvd->vdev_path = spa_strdup(vd->vdev_path);
if (vd->vdev_physpath)
nvd->vdev_physpath = spa_strdup(vd->vdev_physpath);
if (vd->vdev_devid)
nvd->vdev_devid = spa_strdup(vd->vdev_devid);
nvd->vdev_wholedisk = vd->vdev_wholedisk;
nvd->vdev_guid = vd->vdev_guid;
retries++;
rc = vdev_disk_open_common(nvd);
if (rc)
break;
}
if (!rc)
rc = vdev_disk_probe_io(nvd, vl_pad, VDEV_SKIP_SIZE,
offset, WRITE);
/* Clean up if we allocated a new vdev */
if (retries) {
vdev_disk_close(nvd);
if (nvd->vdev_path)
spa_strfree(nvd->vdev_path);
if (nvd->vdev_physpath)
spa_strfree(nvd->vdev_physpath);
if (nvd->vdev_devid)
spa_strfree(nvd->vdev_devid);
kmem_free(nvd, sizeof(vdev_t));
}
vmem_free(vl_pad, VDEV_SKIP_SIZE);
/* Reset the failing flag */
if (!rc)
vd->vdev_is_failing = B_FALSE;
return rc;
} }
#if 0 #if 0
/* XXX: Not yet supported */
static void static void
vdev_disk_ioctl_done(void *zio_arg, int rc) vdev_disk_ioctl_done(void *zio_arg, int error)
{ {
zio_t *zio = zio_arg; zio_t *zio = zio_arg;
zio->io_error = rc; zio->io_error = error;
zio_interrupt(zio); zio_interrupt(zio);
} }
@ -496,10 +375,8 @@ static int
vdev_disk_io_start(zio_t *zio) vdev_disk_io_start(zio_t *zio)
{ {
vdev_t *vd = zio->io_vd; vdev_t *vd = zio->io_vd;
// vdev_disk_t *dvd = vd->vdev_tsd; vdev_disk_t *dvd = vd->vdev_tsd;
int flags, rc; int flags, error;
// dprintf("zio=%p\n", zio);
if (zio->io_type == ZIO_TYPE_IOCTL) { if (zio->io_type == ZIO_TYPE_IOCTL) {
zio_vdev_io_bypass(zio); zio_vdev_io_bypass(zio);
@ -523,15 +400,18 @@ vdev_disk_io_start(zio_t *zio)
} }
#if 0 #if 0
/* XXX: Not yet supported */
vdev_disk_t *dvd = vd->vdev_tsd;
zio->io_dk_callback.dkc_callback = vdev_disk_ioctl_done; zio->io_dk_callback.dkc_callback = vdev_disk_ioctl_done;
zio->io_dk_callback.dkc_flag = FLUSH_VOLATILE; zio->io_dk_callback.dkc_flag = FLUSH_VOLATILE;
zio->io_dk_callback.dkc_cookie = zio; zio->io_dk_callback.dkc_cookie = zio;
rc = ldi_ioctl(dvd->vd_lh, zio->io_cmd, error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
(uintptr_t)&zio->io_dk_callback, (uintptr_t)&zio->io_dk_callback,
FKIOCTL, kcred, NULL); FKIOCTL, kcred, NULL);
if (rc == 0) { if (error == 0) {
/* /*
* The ioctl will be done asychronously, * The ioctl will be done asychronously,
* and will call vdev_disk_ioctl_done() * and will call vdev_disk_ioctl_done()
@ -540,10 +420,10 @@ vdev_disk_io_start(zio_t *zio)
return ZIO_PIPELINE_STOP; return ZIO_PIPELINE_STOP;
} }
#else #else
rc = ENOTSUP; error = ENOTSUP;
#endif #endif
if (rc == ENOTSUP || rc == ENOTTY) { if (error == ENOTSUP || error == ENOTTY) {
/* /*
* If we get ENOTSUP or ENOTTY, we know that * If we get ENOTSUP or ENOTTY, we know that
* no future attempts will ever succeed. * no future attempts will ever succeed.
@ -553,7 +433,7 @@ vdev_disk_io_start(zio_t *zio)
*/ */
vd->vdev_nowritecache = B_TRUE; vd->vdev_nowritecache = B_TRUE;
} }
zio->io_error = rc; zio->io_error = error;
break; break;
@ -564,51 +444,24 @@ vdev_disk_io_start(zio_t *zio)
return ZIO_PIPELINE_CONTINUE; return ZIO_PIPELINE_CONTINUE;
} }
if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio) == 0) /*
return ZIO_PIPELINE_STOP; * B_BUSY XXX: Not supported
* B_NOCACHE XXX: Not supported
if ((zio = vdev_queue_io(zio)) == NULL) */
return ZIO_PIPELINE_STOP;
if (zio->io_type == ZIO_TYPE_WRITE)
rc = vdev_writeable(vd) ? vdev_error_inject(vd, zio) : ENXIO;
else
rc = vdev_readable(vd) ? vdev_error_inject(vd, zio) : ENXIO;
rc = (vd->vdev_remove_wanted || vd->vdev_is_failing) ? ENXIO : rc;
if (rc) {
zio->io_error = rc;
zio_interrupt(zio);
return ZIO_PIPELINE_STOP;
}
flags = ((zio->io_type == ZIO_TYPE_READ) ? READ : WRITE); flags = ((zio->io_type == ZIO_TYPE_READ) ? READ : WRITE);
/* flags |= B_BUSY | B_NOCACHE; FIXME : Not supported */
if (zio->io_flags & ZIO_FLAG_FAILFAST) if (zio->io_flags & ZIO_FLAG_IO_RETRY)
flags |= (1 << BIO_RW_FAILFAST); flags |= (1 << BIO_RW_FAILFAST);
__vdev_disk_physio(dvd->vd_lh, zio, zio->io_data,
vdev_disk_io(vd, zio, zio->io_data, zio->io_size, zio->io_size, zio->io_offset, flags);
zio->io_offset, flags);
return ZIO_PIPELINE_STOP; return ZIO_PIPELINE_STOP;
} }
static int static void
vdev_disk_io_done(zio_t *zio) vdev_disk_io_done(zio_t *zio)
{ {
// dprintf("zio=%p\n", zio);
vdev_queue_io_done(zio);
if (zio->io_type == ZIO_TYPE_WRITE)
vdev_cache_write(zio);
if (zio_injection_enabled && zio->io_error == 0)
zio->io_error = zio_handle_device_injection(zio->io_vd, EIO);
/* /*
* If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
* the device has been removed. If this is the case, then we trigger an * the device has been removed. If this is the case, then we trigger an
@ -616,38 +469,24 @@ vdev_disk_io_done(zio_t *zio)
* make sure it's still accessible. * make sure it's still accessible.
*/ */
if (zio->io_error == EIO) { if (zio->io_error == EIO) {
ASSERT(0); /* FIXME: Not yet supported */ ASSERT(0); /* XXX: Not yet supported */
#if 0 #if 0
vdev_t *vd = zio->io_vd; vdev_t *vd = zio->io_vd;
vdev_disk_t *dvd = vd->vdev_tsd; vdev_disk_t *dvd = vd->vdev_tsd;
int state; int state = DKIO_NONE;
state = DKIO_NONE; if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
if (dvd && ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state, FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
FKIOCTL, kcred, NULL) == 0 &&
state != DKIO_INSERTED) {
vd->vdev_remove_wanted = B_TRUE; vd->vdev_remove_wanted = B_TRUE;
spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE); spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
} else if (vdev_probe(vd) != 0) {
ASSERT(vd->vdev_ops->vdev_op_leaf);
vd->vdev_is_failing = B_TRUE;
} }
#endif #endif
} }
return ZIO_PIPELINE_CONTINUE;
}
nvlist_t *
vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
{
return NULL;
} }
vdev_ops_t vdev_disk_ops = { vdev_ops_t vdev_disk_ops = {
vdev_disk_open, vdev_disk_open,
vdev_disk_close, vdev_disk_close,
vdev_disk_probe,
vdev_default_asize, vdev_default_asize,
vdev_disk_io_start, vdev_disk_io_start,
vdev_disk_io_done, vdev_disk_io_done,
@ -656,4 +495,79 @@ vdev_ops_t vdev_disk_ops = {
B_TRUE /* leaf vdev */ B_TRUE /* leaf vdev */
}; };
#endif /* _KERNEL */ /*
* Given the root disk device devid or pathname, read the label from
* the device, and construct a configuration nvlist.
*/
int
vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
{
struct block_device *vd_lh;
vdev_label_t *label;
uint64_t s, size;
int i;
/*
* Read the device label and build the nvlist.
* XXX: Not yet supported
*/
#if 0
if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
&minor_name) == 0) {
error = ldi_open_by_devid(tmpdevid, minor_name, spa_mode,
kcred, &vd_lh, zfs_li);
ddi_devid_free(tmpdevid);
ddi_devid_str_free(minor_name);
}
#endif
vd_lh = open_bdev_excl(devpath, MS_RDONLY, NULL);
if (IS_ERR(vd_lh))
return -PTR_ERR(vd_lh);
if ((s = i_size_read(vd_lh->bd_inode)) == 0) {
close_bdev_excl(vd_lh);
return EIO;
}
size = P2ALIGN_TYPED(s, sizeof(vdev_label_t), uint64_t);
label = vmem_alloc(sizeof(vdev_label_t), KM_SLEEP);
for (i = 0; i < VDEV_LABELS; i++) {
uint64_t offset, state, txg = 0;
/* read vdev label */
offset = vdev_label_offset(size, i, 0);
if (vdev_disk_physio(vd_lh, (caddr_t)label,
VDEV_SKIP_SIZE + VDEV_BOOT_HEADER_SIZE +
VDEV_PHYS_SIZE, offset, READ) != 0)
continue;
if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
*config = NULL;
continue;
}
if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
&state) != 0 || state >= POOL_STATE_DESTROYED) {
nvlist_free(*config);
*config = NULL;
continue;
}
if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
&txg) != 0 || txg == 0) {
nvlist_free(*config);
*config = NULL;
continue;
}
break;
}
vmem_free(label, sizeof(vdev_label_t));
close_bdev_excl(vd_lh);
return 0;
}