コード例 #1
0
ファイル: spa_history.c プロジェクト: BjoKaSH/zfs-osx
/*
 * Write out a history event.
 */
int
spa_history_log(spa_t *spa, const char *history_str, history_log_type_t what)
{
	history_arg_t *ha;
	int err = 0;
	dmu_tx_t *tx;

	ASSERT(what != LOG_INTERNAL);

	tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
	err = dmu_tx_assign(tx, TXG_WAIT);
	if (err) {
		dmu_tx_abort(tx);
		return (err);
	}

	ha = kmem_alloc(sizeof (history_arg_t), KM_PUSHPAGE);
	ha->ha_history_str = spa_strdup(history_str);
	ha->ha_zone = spa_strdup(spa_history_zone());
	ha->ha_log_type = what;
	ha->ha_uid = crgetuid(CRED());

	/* Kick this off asynchronously; errors are ignored. */
	dsl_sync_task_do_nowait(spa_get_dsl(spa), NULL,
	    spa_history_log_sync, spa, ha, 0, tx);
	dmu_tx_commit(tx);

	/* spa_history_log_sync will free ha and strings */
	return (err);
}
コード例 #2
0
ファイル: vdev_file.c プロジェクト: YaroslavLitvinov/zfs-port
/*
 * 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_file_probe(vdev_t *vd)
{
	vdev_t *nvd;
	char *vl_boot;
	uint64_t offset;
	int l, error = 0, retries = 0;

	if (vd == NULL)
		return (EINVAL);

	/* Hijack the current vdev */
	nvd = vd;

	/*
	 * Pick a random label to rewrite.
	 */
	l = spa_get_random(VDEV_LABELS);
	ASSERT(l < VDEV_LABELS);

	offset = vdev_label_offset(vd->vdev_psize, l,
	    offsetof(vdev_label_t, vl_boot_header));

	vl_boot = kmem_alloc(VDEV_BOOT_HEADER_SIZE, KM_SLEEP);

	while ((error = vdev_file_probe_io(nvd, vl_boot, VDEV_BOOT_HEADER_SIZE,
	    offset, UIO_READ)) != 0 && retries == 0) {

		/*
		 * If we failed with the vdev that was passed in then
		 * try allocating a new one and try again.
		 */
		nvd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP);
		if (vd->vdev_path)
			nvd->vdev_path = spa_strdup(vd->vdev_path);
		nvd->vdev_guid = vd->vdev_guid;
		retries++;

		if (vdev_file_open_common(nvd) != 0)
			break;
	}

	if ((spa_mode & FWRITE) && !error) {
		error = vdev_file_probe_io(nvd, vl_boot, VDEV_BOOT_HEADER_SIZE,
		    offset, UIO_WRITE);
	}

	if (retries) {
		vdev_file_close(nvd);
		if (nvd->vdev_path)
			spa_strfree(nvd->vdev_path);
		kmem_free(nvd, sizeof (vdev_t));
	}
	kmem_free(vl_boot, VDEV_BOOT_HEADER_SIZE);

	if (!error)
		vd->vdev_is_failing = B_FALSE;

	return (error);
}
コード例 #3
0
ファイル: dsl_prop.c プロジェクト: Alyseo/zfs
static dsl_prop_record_t *
dsl_prop_record_create(dsl_dir_t *dd, const char *propname)
{
	dsl_prop_record_t *pr;

	ASSERT(MUTEX_HELD(&dd->dd_lock));

	pr = kmem_alloc(sizeof (dsl_prop_record_t), KM_SLEEP);
	pr->pr_propname = spa_strdup(propname);
	list_create(&pr->pr_cbs, sizeof (dsl_prop_cb_record_t),
	    offsetof(dsl_prop_cb_record_t, cbr_pr_node));
	list_insert_head(&dd->dd_props, pr);

	return (pr);
}
コード例 #4
0
ファイル: vdev_disk.c プロジェクト: cbreak-black/zfs
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
    uint64_t *ashift)
{
	spa_t *spa = vd->vdev_spa;
	vdev_disk_t *dvd = vd->vdev_tsd;
	ldi_ev_cookie_t ecookie;
	vdev_disk_ldi_cb_t *lcb;
	union {
		struct dk_minfo_ext ude;
		struct dk_minfo ud;
	} dks;
	struct dk_minfo_ext *dkmext = &dks.ude;
	struct dk_minfo *dkm = &dks.ud;
	int error;
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
	dev_t dev;
	int otyp;
	boolean_t validate_devid = B_FALSE;
	ddi_devid_t devid;
#endif
	uint64_t capacity = 0, blksz = 0, pbsize;
#ifdef __APPLE__
	int isssd;
#endif

	/*
	 * We must have a pathname, and it must be absolute.
	 */
	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
		return (SET_ERROR(EINVAL));
	}

	/*
	 * Reopen the device if it's not currently open. Otherwise,
	 * just update the physical size of the device.
	 */
	if (dvd != NULL) {
		if (dvd->vd_ldi_offline && dvd->vd_lh == NULL) {
			/*
			 * If we are opening a device in its offline notify
			 * context, the LDI handle was just closed. Clean
			 * up the LDI event callbacks and free vd->vdev_tsd.
			 */
			vdev_disk_free(vd);
		} else {
			ASSERT(vd->vdev_reopening);
			goto skip_open;
		}
	}

	/*
	 * Create vd->vdev_tsd.
	 */
	vdev_disk_alloc(vd);
	dvd = vd->vdev_tsd;

	/*
	 * When opening a disk device, we want to preserve the user's original
	 * intent.  We always want to open the device by the path the user gave
	 * us, even if it is one of multiple paths to the same device.  But we
	 * also want to be able to survive disks being removed/recabled.
	 * Therefore the sequence of opening devices is:
	 *
	 * 1. Try opening the device by path.  For legacy pools without the
	 *    'whole_disk' property, attempt to fix the path by appending 's0'.
	 *
	 * 2. If the devid of the device matches the stored value, return
	 *    success.
	 *
	 * 3. Otherwise, the device may have moved.  Try opening the device
	 *    by the devid instead.
	 */
/*
 * XXX We must not set or modify the devid as this check would prevent
 * import on Solaris/illumos.
 */
#ifdef illumos
	if (vd->vdev_devid != NULL) {
		if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
		    &dvd->vd_minor) != 0) {
			vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
			vdev_dbgmsg(vd, "vdev_disk_open: invalid "
			    "vdev_devid '%s'", vd->vdev_devid);
			return (SET_ERROR(EINVAL));
		}
	}
#endif

	error = EINVAL;		/* presume failure */

	if (vd->vdev_path != NULL) {

/*
 * XXX This assumes that if vdev_path refers to a device path /dev/dsk/cNtNdN,
 * then the whole disk can be found by slice 0 at path /dev/dsk/cNtNdNs0.
 */
#ifdef illumos
		if (vd->vdev_wholedisk == -1ULL) {
			size_t len = strlen(vd->vdev_path) + 3;
			char *buf = kmem_alloc(len, KM_SLEEP);

			(void) snprintf(buf, len, "%ss0", vd->vdev_path);

			error = ldi_open_by_name(buf, spa_mode(spa), kcred,
			    &dvd->vd_lh, zfs_li);
			if (error == 0) {
				spa_strfree(vd->vdev_path);
				vd->vdev_path = buf;
				vd->vdev_wholedisk = 1ULL;
			} else {
				kmem_free(buf, len);
			}
		}
#endif

		/*
		 * If we have not yet opened the device, try to open it by the
		 * specified path.
		 */
		if (error != 0) {
			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
		}

/* XXX Apple - must leave devid unchanged */
#ifdef illumos
		/*
		 * Compare the devid to the stored value.
		 */
		if (error == 0 && vd->vdev_devid != NULL &&
		    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
			if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
				error = SET_ERROR(EINVAL);
				(void) ldi_close(dvd->vd_lh, spa_mode(spa),
				    kcred);
				dvd->vd_lh = NULL;
			}
			ddi_devid_free(devid);
		}
#endif

		/*
		 * If we succeeded in opening the device, but 'vdev_wholedisk'
		 * is not yet set, then this must be a slice.
		 */
		if (error == 0 && vd->vdev_wholedisk == -1ULL)
			vd->vdev_wholedisk = 0;
	}

/* XXX Apple - must leave devid unchanged */
#ifdef illumos
	/*
	 * If we were unable to open by path, or the devid check fails, open by
	 * devid instead.
	 */
	if (error != 0 && vd->vdev_devid != NULL) {
		error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
		    spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
	}
#endif

	/*
	 * If all else fails, then try opening by physical path (if available)
	 * or the logical path (if we failed due to the devid check).  While not
	 * as reliable as the devid, this will give us something, and the higher
	 * level vdev validation will prevent us from opening the wrong device.
	 */
	if (error) {
/* XXX Apple - must leave devid unchanged */
#ifdef illumos
		if (vd->vdev_devid != NULL)
			validate_devid = B_TRUE;
#endif

/* XXX Apple to do - make ddi_ interface for this, using IORegistry path */
#ifdef illumos
		if (vd->vdev_physpath != NULL &&
		    (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
			error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
#endif

		/*
		 * Note that we don't support the legacy auto-wholedisk support
		 * as above.  This hasn't been used in a very long time and we
		 * don't need to propagate its oddities to this edge condition.
		 */
		if (error && vd->vdev_path != NULL)
			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
	}

	if (error) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		vdev_dbgmsg(vd, "vdev_disk_open: failed to open [error=%d]",
		    error);
		return (error);
	}

/*
 * XXX Apple - We must not set or modify the devid. Import on Solaris/illumos
 * expects a valid devid and fails if it cannot be decoded.
 */
#ifdef illumos
	/*
	 * Now that the device has been successfully opened, update the devid
	 * if necessary.
	 */
	if (validate_devid && spa_writeable(spa) &&
	    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
		if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
			char *vd_devid;

			vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
			vdev_dbgmsg(vd, "vdev_disk_open: update devid from "
			    "'%s' to '%s'", vd->vdev_devid, vd_devid);
			spa_strfree(vd->vdev_devid);
			vd->vdev_devid = spa_strdup(vd_devid);
			ddi_devid_str_free(vd_devid);
		}
		ddi_devid_free(devid);
	}
#endif

/* XXX Apple to do, needs IORegistry physpath interface */
#ifdef illumos
	/*
	 * Once a device is opened, verify that the physical device path (if
	 * available) is up to date.
	 */
	if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
	    ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
		char *physpath, *minorname;

		physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
		minorname = NULL;
		if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
		    ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
		    (vd->vdev_physpath == NULL ||
		    strcmp(vd->vdev_physpath, physpath) != 0)) {
			if (vd->vdev_physpath)
				spa_strfree(vd->vdev_physpath);
			(void) strlcat(physpath, ":", MAXPATHLEN);
			(void) strlcat(physpath, minorname, MAXPATHLEN);
			vd->vdev_physpath = spa_strdup(physpath);
		}
		if (minorname)
			kmem_free(minorname, strlen(minorname) + 1);
		kmem_free(physpath, MAXPATHLEN);
	}
#endif

	/*
	 * Register callbacks for the LDI offline event.
	 */
	if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
	    LDI_EV_SUCCESS) {
		lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
		list_insert_tail(&dvd->vd_ldi_cbs, lcb);
		(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
		    &vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
	}

/* XXX Apple to do - we could support the degrade event, or just no-op */
#ifdef illumos
	/*
	 * Register callbacks for the LDI degrade event.
	 */
	if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
	    LDI_EV_SUCCESS) {
		lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
		list_insert_tail(&dvd->vd_ldi_cbs, lcb);
		(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
		    &vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
	}
#endif

#if 0
	int len = MAXPATHLEN;
	if (vn_getpath(devvp, dvd->vd_readlinkname, &len) == 0) {
		dprintf("ZFS: '%s' resolved name is '%s'\n",
			   vd->vdev_path, dvd->vd_readlinkname);
	} else {
		dvd->vd_readlinkname[0] = 0;
	}
#endif

skip_open:
	/*
	 * Determine the actual size of the device.
	 */
	if (ldi_get_size(dvd->vd_lh, psize) != 0) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		vdev_dbgmsg(vd, "vdev_disk_open: failed to get size");
		return (SET_ERROR(EINVAL));
	}

	*max_psize = *psize;

	/*
	 * Determine the device's minimum transfer size.
	 * If the ioctl isn't supported, assume DEV_BSIZE.
	 */
	if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
	    (intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
		capacity = dkmext->dki_capacity - 1;
		blksz = dkmext->dki_lbsize;
		pbsize = dkmext->dki_pbsize;
	} else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
	    (intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
		VDEV_DEBUG(
		    "vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
		    vd->vdev_path);
		capacity = dkm->dki_capacity - 1;
		blksz = dkm->dki_lbsize;
		pbsize = blksz;
	} else {
		VDEV_DEBUG("vdev_disk_open(\"%s\"): "
		    "both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
		    vd->vdev_path, error);
		pbsize = DEV_BSIZE;
	}

	*ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;

/* XXX Now that we opened the device, determine if it is a whole disk. */
#ifdef __APPLE__
	/*
	 * XXX Apple to do - provide an ldi_ mechanism
	 * to report whether this is a whole disk or a
	 * partition.
	 * Return 0 (no), 1 (yes), or -1 (error).
	 */
//	vd->vdev_wholedisk = ldi_is_wholedisk(vd->vd_lh);
#endif

	if (vd->vdev_wholedisk == 1) {
		int wce = 1;

/* Gets information about the disk if it has GPT partitions */
#ifdef illumos
		if (error == 0) {
			/*
			 * If we have the capability to expand, we'd have
			 * found out via success from DKIOCGMEDIAINFO{,EXT}.
			 * Adjust max_psize upward accordingly since we know
			 * we own the whole disk now.
			 */
			*max_psize = capacity * blksz;
		}
#endif

		/*
		 * Since we own the whole disk, try to enable disk write
		 * caching.  We ignore errors because it's OK if we can't do it.
		 */
		(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
		    FKIOCTL, kcred, NULL);
	}

	/*
	 * Clear the nowritecache bit, so that on a vdev_reopen() we will
	 * try again.
	 */
	vd->vdev_nowritecache = B_FALSE;

#ifdef __APPLE__
	/* Inform the ZIO pipeline that we are non-rotational */
	vd->vdev_nonrot = B_FALSE;
	if (ldi_ioctl(dvd->vd_lh, DKIOCISSOLIDSTATE, (intptr_t)&isssd,
	    FKIOCTL, kcred, NULL) == 0) {
		vd->vdev_nonrot = (isssd ? B_TRUE : B_FALSE);
	}
#endif //__APPLE__

	return (0);
}
コード例 #5
0
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
    uint64_t *ashift)
{
	spa_t *spa = vd->vdev_spa;
	vdev_disk_t *dvd;
	ldi_ev_cookie_t ecookie;
	vdev_disk_ldi_cb_t *lcb;
	union {
		struct dk_minfo_ext ude;
		struct dk_minfo ud;
	} dks;
	struct dk_minfo_ext *dkmext = &dks.ude;
	struct dk_minfo *dkm = &dks.ud;
	int error;
	dev_t dev;
	int otyp;
	boolean_t validate_devid = B_FALSE;
	ddi_devid_t devid;
	uint64_t capacity = 0, blksz = 0, pbsize;

	/*
	 * We must have a pathname, and it must be absolute.
	 */
	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
		return (SET_ERROR(EINVAL));
	}
	rw_enter(&vd->vdev_tsd_lock, RW_WRITER);
	dvd = vd->vdev_tsd;
	/*
	 * Reopen the device if it's not currently open. Otherwise,
	 * just update the physical size of the device.
	 */
	if (dvd != NULL) {
		ASSERT(vd->vdev_reopening);
		/*
		 * Here vd_lh is protected by vdev_tsd_lock
		 */
		ASSERT(dvd->vd_lh != NULL);
		/* This should not happen, but let's be safe */
		if (dvd->vd_lh == NULL) {
			/* What are we going to do here??? */
			rw_exit(&vd->vdev_tsd_lock);
			return (SET_ERROR(ENXIO));
		}
		goto skip_open;
	}
	/*
	 * Create dvd to be used as vd->vdev_tsd.
	 */
	vd->vdev_tsd = dvd = vdev_disk_alloc();

	/*
	 * When opening a disk device, we want to preserve the user's original
	 * intent.  We always want to open the device by the path the user gave
	 * us, even if it is one of multiple paths to the same device.  But we
	 * also want to be able to survive disks being removed/recabled.
	 * Therefore the sequence of opening devices is:
	 *
	 * 1. Try opening the device by path.  For legacy pools without the
	 *    'whole_disk' property, attempt to fix the path by appending 's0'.
	 *
	 * 2. If the devid of the device matches the stored value, return
	 *    success.
	 *
	 * 3. Otherwise, the device may have moved.  Try opening the device
	 *    by the devid instead.
	 */
	if (vd->vdev_devid != NULL) {
		if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
		    &dvd->vd_minor) != 0) {
			vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
			vdev_disk_free_locked(vd);
			rw_exit(&vd->vdev_tsd_lock);
			return (SET_ERROR(EINVAL));
		}
	}

	error = EINVAL;		/* presume failure */

	if (vd->vdev_path != NULL) {

		if (vd->vdev_wholedisk == -1ULL) {
			size_t len = strlen(vd->vdev_path) + 3;
			char *buf = kmem_alloc(len, KM_SLEEP);

			(void) snprintf(buf, len, "%ss0", vd->vdev_path);

			error = ldi_open_by_name(buf, spa_mode(spa), kcred,
			    &dvd->vd_lh, zfs_li);
			if (error == 0) {
				spa_strfree(vd->vdev_path);
				vd->vdev_path = buf;
				vd->vdev_wholedisk = 1ULL;
			} else {
				kmem_free(buf, len);
			}
		}

		/*
		 * If we have not yet opened the device, try to open it by the
		 * specified path.
		 */
		if (error != 0) {
			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
		}

		/*
		 * Compare the devid to the stored value.
		 */
		if (error == 0 && vd->vdev_devid != NULL &&
		    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
			if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
				error = SET_ERROR(EINVAL);
				(void) ldi_close(dvd->vd_lh, spa_mode(spa),
				    kcred);
				dvd->vd_lh = NULL;
			}
			ddi_devid_free(devid);
		}

		/*
		 * If we succeeded in opening the device, but 'vdev_wholedisk'
		 * is not yet set, then this must be a slice.
		 */
		if (error == 0 && vd->vdev_wholedisk == -1ULL)
			vd->vdev_wholedisk = 0;
	}

	/*
	 * If we were unable to open by path, or the devid check fails, open by
	 * devid instead.
	 */
	if (error != 0 && vd->vdev_devid != NULL) {
		error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
		    spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
	}

	/*
	 * If all else fails, then try opening by physical path (if available)
	 * or the logical path (if we failed due to the devid check).  While not
	 * as reliable as the devid, this will give us something, and the higher
	 * level vdev validation will prevent us from opening the wrong device.
	 */
	if (error) {
		if (vd->vdev_devid != NULL)
			validate_devid = B_TRUE;

		if (vd->vdev_physpath != NULL &&
		    (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
			error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);

		/*
		 * Note that we don't support the legacy auto-wholedisk support
		 * as above.  This hasn't been used in a very long time and we
		 * don't need to propagate its oddities to this edge condition.
		 */
		if (error && vd->vdev_path != NULL)
			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
	}

	if (error) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		vdev_disk_free_locked(vd);
		rw_exit(&vd->vdev_tsd_lock);
		return (error);
	}

	/*
	 * Now that the device has been successfully opened, update the devid
	 * if necessary.
	 */
	if (validate_devid && spa_writeable(spa) &&
	    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
		if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
			char *vd_devid;

			vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
			zfs_dbgmsg("vdev %s: update devid from %s, "
			    "to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
			spa_strfree(vd->vdev_devid);
			vd->vdev_devid = spa_strdup(vd_devid);
			ddi_devid_str_free(vd_devid);
		}
		ddi_devid_free(devid);
	}

	/*
	 * Once a device is opened, verify that the physical device path (if
	 * available) is up to date.
	 */
	if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
	    ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
		char *physpath, *minorname;

		physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
		minorname = NULL;
		if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
		    ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
		    (vd->vdev_physpath == NULL ||
		    strcmp(vd->vdev_physpath, physpath) != 0)) {
			if (vd->vdev_physpath)
				spa_strfree(vd->vdev_physpath);
			(void) strlcat(physpath, ":", MAXPATHLEN);
			(void) strlcat(physpath, minorname, MAXPATHLEN);
			vd->vdev_physpath = spa_strdup(physpath);
		}
		if (minorname)
			kmem_free(minorname, strlen(minorname) + 1);
		kmem_free(physpath, MAXPATHLEN);
	}

	/*
	 * Register callbacks for the LDI offline event.
	 */
	if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
	    LDI_EV_SUCCESS) {
		lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
		list_insert_tail(&dvd->vd_ldi_cbs, lcb);
		(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
		    &vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
	}

	/*
	 * Register callbacks for the LDI degrade event.
	 */
	if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
	    LDI_EV_SUCCESS) {
		lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
		list_insert_tail(&dvd->vd_ldi_cbs, lcb);
		(void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
		    &vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
	}

	/* Reset TRIM flag, as underlying device support may have changed */
	vd->vdev_notrim = B_FALSE;

skip_open:
	ASSERT(dvd != NULL);
	/*
	 * Determine the actual size of the device.
	 */
	if (ldi_get_size(dvd->vd_lh, psize) != 0) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		vdev_disk_free_locked(vd);
		rw_exit(&vd->vdev_tsd_lock);
		return (SET_ERROR(EINVAL));
	}

	*max_psize = *psize;

	/*
	 * Determine the device's minimum transfer size.
	 * If the ioctl isn't supported, assume DEV_BSIZE.
	 */
	if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
	    (intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
		capacity = dkmext->dki_capacity - 1;
		blksz = dkmext->dki_lbsize;
		pbsize = dkmext->dki_pbsize;
	} else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
	    (intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
		VDEV_DEBUG(
		    "vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
		    vd->vdev_path);
		capacity = dkm->dki_capacity - 1;
		blksz = dkm->dki_lbsize;
		pbsize = blksz;
	} else {
		VDEV_DEBUG("vdev_disk_open(\"%s\"): "
		    "both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
		    vd->vdev_path, error);
		pbsize = DEV_BSIZE;
	}

	*ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;

	if (vd->vdev_wholedisk == 1) {
		int wce = 1;

		if (error == 0) {
			/*
			 * If we have the capability to expand, we'd have
			 * found out via success from DKIOCGMEDIAINFO{,EXT}.
			 * Adjust max_psize upward accordingly since we know
			 * we own the whole disk now.
			 */
			*max_psize += vdev_disk_get_space(vd, capacity, blksz);
			zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
			    "max_psize %llu", vd->vdev_path, *psize,
			    *max_psize);
		}

		/*
		 * Since we own the whole disk, try to enable disk write
		 * caching.  We ignore errors because it's OK if we can't do it.
		 */
		(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
		    FKIOCTL, kcred, NULL);
	}
	/*
	 * We are done with vd_lh and vdev_tsd, release the vdev_tsd_lock
	 */
	rw_exit(&vd->vdev_tsd_lock);

	/*
	 * Clear the nowritecache bit, so that on a vdev_reopen() we will
	 * try again.
	 */
	vd->vdev_nowritecache = B_FALSE;

	return (0);
}
コード例 #6
0
ファイル: vdev_disk.c プロジェクト: AhmadTux/freebsd
static int
vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
{
	spa_t *spa = vd->vdev_spa;
	vdev_disk_t *dvd;
	struct dk_minfo_ext dkmext;
	int error;
	dev_t dev;
	int otyp;

	/*
	 * We must have a pathname, and it must be absolute.
	 */
	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
		return (EINVAL);
	}

	/*
	 * Reopen the device if it's not currently open. Otherwise,
	 * just update the physical size of the device.
	 */
	if (vd->vdev_tsd != NULL) {
		ASSERT(vd->vdev_reopening);
		dvd = vd->vdev_tsd;
		goto skip_open;
	}

	dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);

	/*
	 * When opening a disk device, we want to preserve the user's original
	 * intent.  We always want to open the device by the path the user gave
	 * us, even if it is one of multiple paths to the save device.  But we
	 * also want to be able to survive disks being removed/recabled.
	 * Therefore the sequence of opening devices is:
	 *
	 * 1. Try opening the device by path.  For legacy pools without the
	 *    'whole_disk' property, attempt to fix the path by appending 's0'.
	 *
	 * 2. If the devid of the device matches the stored value, return
	 *    success.
	 *
	 * 3. Otherwise, the device may have moved.  Try opening the device
	 *    by the devid instead.
	 */
	if (vd->vdev_devid != NULL) {
		if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
		    &dvd->vd_minor) != 0) {
			vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
			return (EINVAL);
		}
	}

	error = EINVAL;		/* presume failure */

	if (vd->vdev_path != NULL) {
		ddi_devid_t devid;

		if (vd->vdev_wholedisk == -1ULL) {
			size_t len = strlen(vd->vdev_path) + 3;
			char *buf = kmem_alloc(len, KM_SLEEP);
			ldi_handle_t lh;

			(void) snprintf(buf, len, "%ss0", vd->vdev_path);

			if (ldi_open_by_name(buf, spa_mode(spa), kcred,
			    &lh, zfs_li) == 0) {
				spa_strfree(vd->vdev_path);
				vd->vdev_path = buf;
				vd->vdev_wholedisk = 1ULL;
				(void) ldi_close(lh, spa_mode(spa), kcred);
			} else {
				kmem_free(buf, len);
			}
		}

		error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
		    &dvd->vd_lh, zfs_li);

		/*
		 * Compare the devid to the stored value.
		 */
		if (error == 0 && vd->vdev_devid != NULL &&
		    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
			if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
				error = EINVAL;
				(void) ldi_close(dvd->vd_lh, spa_mode(spa),
				    kcred);
				dvd->vd_lh = NULL;
			}
			ddi_devid_free(devid);
		}

		/*
		 * If we succeeded in opening the device, but 'vdev_wholedisk'
		 * is not yet set, then this must be a slice.
		 */
		if (error == 0 && vd->vdev_wholedisk == -1ULL)
			vd->vdev_wholedisk = 0;
	}

	/*
	 * If we were unable to open by path, or the devid check fails, open by
	 * devid instead.
	 */
	if (error != 0 && vd->vdev_devid != NULL)
		error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
		    spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);

	/*
	 * If all else fails, then try opening by physical path (if available)
	 * or the logical path (if we failed due to the devid check).  While not
	 * as reliable as the devid, this will give us something, and the higher
	 * level vdev validation will prevent us from opening the wrong device.
	 */
	if (error) {
		if (vd->vdev_physpath != NULL &&
		    (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
			error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);

		/*
		 * Note that we don't support the legacy auto-wholedisk support
		 * as above.  This hasn't been used in a very long time and we
		 * don't need to propagate its oddities to this edge condition.
		 */
		if (error && vd->vdev_path != NULL)
			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
			    kcred, &dvd->vd_lh, zfs_li);
	}

	if (error) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		return (error);
	}

	/*
	 * Once a device is opened, verify that the physical device path (if
	 * available) is up to date.
	 */
	if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
	    ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
		char *physpath, *minorname;

		physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
		minorname = NULL;
		if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
		    ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
		    (vd->vdev_physpath == NULL ||
		    strcmp(vd->vdev_physpath, physpath) != 0)) {
			if (vd->vdev_physpath)
				spa_strfree(vd->vdev_physpath);
			(void) strlcat(physpath, ":", MAXPATHLEN);
			(void) strlcat(physpath, minorname, MAXPATHLEN);
			vd->vdev_physpath = spa_strdup(physpath);
		}
		if (minorname)
			kmem_free(minorname, strlen(minorname) + 1);
		kmem_free(physpath, MAXPATHLEN);
	}

skip_open:
	/*
	 * Determine the actual size of the device.
	 */
	if (ldi_get_size(dvd->vd_lh, psize) != 0) {
		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
		return (EINVAL);
	}

	/*
	 * If we own the whole disk, try to enable disk write caching.
	 * We ignore errors because it's OK if we can't do it.
	 */
	if (vd->vdev_wholedisk == 1) {
		int wce = 1;
		(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
		    FKIOCTL, kcred, NULL);
	}

	/*
	 * Determine the device's minimum transfer size.
	 * If the ioctl isn't supported, assume DEV_BSIZE.
	 */
	if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
	    FKIOCTL, kcred, NULL) != 0)
		dkmext.dki_pbsize = DEV_BSIZE;

	*ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;

	/*
	 * Clear the nowritecache bit, so that on a vdev_reopen() we will
	 * try again.
	 */
	vd->vdev_nowritecache = B_FALSE;

	return (0);
}
コード例 #7
0
/*
 * Allocate a new vdev.  The 'alloctype' is used to control whether we are
 * creating a new vdev or loading an existing one - the behavior is slightly
 * different for each case.
 */
int
vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id,
    int alloctype)
{
	vdev_ops_t *ops;
	char *type;
	uint64_t guid = 0;
	vdev_t *vd;

	ASSERT(spa_config_held(spa, RW_WRITER));

	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
		return (EINVAL);

	if ((ops = vdev_getops(type)) == NULL)
		return (EINVAL);

	/*
	 * If this is a load, get the vdev guid from the nvlist.
	 * Otherwise, vdev_alloc_common() will generate one for us.
	 */
	if (alloctype == VDEV_ALLOC_LOAD) {
		uint64_t label_id;

		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) ||
		    label_id != id)
			return (EINVAL);

		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
			return (EINVAL);
	} else if (alloctype == VDEV_ALLOC_SPARE) {
		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
			return (EINVAL);
	}

	/*
	 * The first allocated vdev must be of type 'root'.
	 */
	if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL)
		return (EINVAL);

	vd = vdev_alloc_common(spa, id, guid, ops);

	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0)
		vd->vdev_path = spa_strdup(vd->vdev_path);
	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0)
		vd->vdev_devid = spa_strdup(vd->vdev_devid);

	/*
	 * Set the nparity propery for RAID-Z vdevs.
	 */
	if (ops == &vdev_raidz_ops) {
		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY,
		    &vd->vdev_nparity) == 0) {
			/*
			 * Currently, we can only support 2 parity devices.
			 */
			if (vd->vdev_nparity > 2)
				return (EINVAL);
			/*
			 * Older versions can only support 1 parity device.
			 */
			if (vd->vdev_nparity == 2 &&
			    spa_version(spa) < ZFS_VERSION_RAID6)
				return (ENOTSUP);

		} else {
			/*
			 * We require the parity to be specified for SPAs that
			 * support multiple parity levels.
			 */
			if (spa_version(spa) >= ZFS_VERSION_RAID6)
				return (EINVAL);

			/*
			 * Otherwise, we default to 1 parity device for RAID-Z.
			 */
			vd->vdev_nparity = 1;
		}
	} else {
		vd->vdev_nparity = 0;
	}

	/*
	 * Set the whole_disk property.  If it's not specified, leave the value
	 * as -1.
	 */
	if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
	    &vd->vdev_wholedisk) != 0)
		vd->vdev_wholedisk = -1ULL;

	/*
	 * Look for the 'not present' flag.  This will only be set if the device
	 * was not present at the time of import.
	 */
	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT,
	    &vd->vdev_not_present);

	/*
	 * Get the alignment requirement.
	 */
	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift);

	/*
	 * If we're a top-level vdev, try to load the allocation parameters.
	 */
	if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) {
		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY,
		    &vd->vdev_ms_array);
		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT,
		    &vd->vdev_ms_shift);
		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE,
		    &vd->vdev_asize);
	}

	/*
	 * If we're a leaf vdev, try to load the DTL object and offline state.
	 */
	if (vd->vdev_ops->vdev_op_leaf && alloctype == VDEV_ALLOC_LOAD) {
		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL,
		    &vd->vdev_dtl.smo_object);
		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE,
		    &vd->vdev_offline);
	}

	/*
	 * Add ourselves to the parent's list of children.
	 */
	vdev_add_child(parent, vd);

	*vdp = vd;

	return (0);
}