fb097b6165
Illumos ZFS issues: 3639 zpool.cache should skip over readonly pools 3640 want automatic devid updates
672 lines
17 KiB
C
672 lines
17 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Delphix. All rights reserved.
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*/
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#include <sys/zfs_context.h>
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#include <sys/spa_impl.h>
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#include <sys/refcount.h>
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#include <sys/vdev_disk.h>
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#include <sys/vdev_impl.h>
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#include <sys/fs/zfs.h>
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#include <sys/zio.h>
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#include <sys/sunldi.h>
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#include <sys/efi_partition.h>
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#include <sys/fm/fs/zfs.h>
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/*
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* Virtual device vector for disks.
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*/
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extern ldi_ident_t zfs_li;
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static void
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vdev_disk_hold(vdev_t *vd)
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{
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ddi_devid_t devid;
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char *minor;
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ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
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/*
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* We must have a pathname, and it must be absolute.
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*/
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if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
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return;
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/*
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* Only prefetch path and devid info if the device has
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* never been opened.
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*/
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if (vd->vdev_tsd != NULL)
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return;
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if (vd->vdev_wholedisk == -1ULL) {
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size_t len = strlen(vd->vdev_path) + 3;
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char *buf = kmem_alloc(len, KM_SLEEP);
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(void) snprintf(buf, len, "%ss0", vd->vdev_path);
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(void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
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kmem_free(buf, len);
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}
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if (vd->vdev_name_vp == NULL)
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(void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
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if (vd->vdev_devid != NULL &&
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ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
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(void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
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ddi_devid_str_free(minor);
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ddi_devid_free(devid);
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}
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}
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static void
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vdev_disk_rele(vdev_t *vd)
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{
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ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
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if (vd->vdev_name_vp) {
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VN_RELE_ASYNC(vd->vdev_name_vp,
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dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
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vd->vdev_name_vp = NULL;
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}
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if (vd->vdev_devid_vp) {
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VN_RELE_ASYNC(vd->vdev_devid_vp,
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dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
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vd->vdev_devid_vp = NULL;
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}
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}
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static uint64_t
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vdev_disk_get_space(vdev_t *vd, uint64_t capacity, uint_t blksz)
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{
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ASSERT(vd->vdev_wholedisk);
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vdev_disk_t *dvd = vd->vdev_tsd;
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dk_efi_t dk_ioc;
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efi_gpt_t *efi;
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uint64_t avail_space = 0;
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int efisize = EFI_LABEL_SIZE * 2;
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dk_ioc.dki_data = kmem_alloc(efisize, KM_SLEEP);
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dk_ioc.dki_lba = 1;
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dk_ioc.dki_length = efisize;
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dk_ioc.dki_data_64 = (uint64_t)(uintptr_t)dk_ioc.dki_data;
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efi = dk_ioc.dki_data;
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if (ldi_ioctl(dvd->vd_lh, DKIOCGETEFI, (intptr_t)&dk_ioc,
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FKIOCTL, kcred, NULL) == 0) {
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uint64_t efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
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zfs_dbgmsg("vdev %s, capacity %llu, altern lba %llu",
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vd->vdev_path, capacity, efi_altern_lba);
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if (capacity > efi_altern_lba)
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avail_space = (capacity - efi_altern_lba) * blksz;
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}
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kmem_free(dk_ioc.dki_data, efisize);
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return (avail_space);
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}
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static int
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vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
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uint64_t *ashift)
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{
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spa_t *spa = vd->vdev_spa;
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vdev_disk_t *dvd;
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struct dk_minfo_ext dkmext;
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int error;
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dev_t dev;
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int otyp;
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boolean_t validate_devid = B_FALSE;
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ddi_devid_t devid;
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/*
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* We must have a pathname, and it must be absolute.
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*/
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if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
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vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
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return (SET_ERROR(EINVAL));
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}
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/*
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* Reopen the device if it's not currently open. Otherwise,
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* just update the physical size of the device.
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*/
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if (vd->vdev_tsd != NULL) {
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ASSERT(vd->vdev_reopening);
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dvd = vd->vdev_tsd;
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goto skip_open;
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}
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dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
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/*
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* When opening a disk device, we want to preserve the user's original
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* intent. We always want to open the device by the path the user gave
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* us, even if it is one of multiple paths to the same device. But we
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* also want to be able to survive disks being removed/recabled.
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* Therefore the sequence of opening devices is:
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*
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* 1. Try opening the device by path. For legacy pools without the
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* 'whole_disk' property, attempt to fix the path by appending 's0'.
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*
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* 2. If the devid of the device matches the stored value, return
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* success.
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*
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* 3. Otherwise, the device may have moved. Try opening the device
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* by the devid instead.
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*/
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if (vd->vdev_devid != NULL) {
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if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
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&dvd->vd_minor) != 0) {
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vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
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return (SET_ERROR(EINVAL));
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}
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}
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error = EINVAL; /* presume failure */
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if (vd->vdev_path != NULL) {
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if (vd->vdev_wholedisk == -1ULL) {
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size_t len = strlen(vd->vdev_path) + 3;
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char *buf = kmem_alloc(len, KM_SLEEP);
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ldi_handle_t lh;
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(void) snprintf(buf, len, "%ss0", vd->vdev_path);
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if (ldi_open_by_name(buf, spa_mode(spa), kcred,
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&lh, zfs_li) == 0) {
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spa_strfree(vd->vdev_path);
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vd->vdev_path = buf;
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vd->vdev_wholedisk = 1ULL;
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(void) ldi_close(lh, spa_mode(spa), kcred);
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} else {
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kmem_free(buf, len);
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}
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}
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error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
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&dvd->vd_lh, zfs_li);
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/*
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* Compare the devid to the stored value.
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*/
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if (error == 0 && vd->vdev_devid != NULL &&
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ldi_get_devid(dvd->vd_lh, &devid) == 0) {
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if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
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error = SET_ERROR(EINVAL);
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(void) ldi_close(dvd->vd_lh, spa_mode(spa),
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kcred);
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dvd->vd_lh = NULL;
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}
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ddi_devid_free(devid);
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}
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/*
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* If we succeeded in opening the device, but 'vdev_wholedisk'
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* is not yet set, then this must be a slice.
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*/
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if (error == 0 && vd->vdev_wholedisk == -1ULL)
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vd->vdev_wholedisk = 0;
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}
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/*
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* If we were unable to open by path, or the devid check fails, open by
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* devid instead.
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*/
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if (error != 0 && vd->vdev_devid != NULL) {
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error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
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spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
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}
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/*
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* If all else fails, then try opening by physical path (if available)
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* or the logical path (if we failed due to the devid check). While not
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* as reliable as the devid, this will give us something, and the higher
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* level vdev validation will prevent us from opening the wrong device.
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*/
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if (error) {
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if (vd->vdev_devid != NULL)
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validate_devid = B_TRUE;
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if (vd->vdev_physpath != NULL &&
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(dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
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error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
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kcred, &dvd->vd_lh, zfs_li);
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/*
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* Note that we don't support the legacy auto-wholedisk support
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* as above. This hasn't been used in a very long time and we
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* don't need to propagate its oddities to this edge condition.
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*/
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if (error && vd->vdev_path != NULL)
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error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
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kcred, &dvd->vd_lh, zfs_li);
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}
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if (error) {
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vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
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return (error);
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}
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/*
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* Now that the device has been successfully opened, update the devid
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* if necessary.
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*/
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if (validate_devid && spa_writeable(spa) &&
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ldi_get_devid(dvd->vd_lh, &devid) == 0) {
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if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
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char *vd_devid;
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vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
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zfs_dbgmsg("vdev %s: update devid from %s, "
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"to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
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spa_strfree(vd->vdev_devid);
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vd->vdev_devid = spa_strdup(vd_devid);
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ddi_devid_str_free(vd_devid);
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}
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ddi_devid_free(devid);
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}
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/*
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* Once a device is opened, verify that the physical device path (if
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* available) is up to date.
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*/
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if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
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ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
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char *physpath, *minorname;
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physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
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minorname = NULL;
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if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
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ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
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(vd->vdev_physpath == NULL ||
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strcmp(vd->vdev_physpath, physpath) != 0)) {
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if (vd->vdev_physpath)
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spa_strfree(vd->vdev_physpath);
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(void) strlcat(physpath, ":", MAXPATHLEN);
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(void) strlcat(physpath, minorname, MAXPATHLEN);
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vd->vdev_physpath = spa_strdup(physpath);
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}
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if (minorname)
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kmem_free(minorname, strlen(minorname) + 1);
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kmem_free(physpath, MAXPATHLEN);
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}
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skip_open:
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/*
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* Determine the actual size of the device.
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*/
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if (ldi_get_size(dvd->vd_lh, psize) != 0) {
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vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
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return (SET_ERROR(EINVAL));
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}
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/*
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* Determine the device's minimum transfer size.
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* If the ioctl isn't supported, assume DEV_BSIZE.
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*/
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if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
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FKIOCTL, kcred, NULL) != 0)
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dkmext.dki_pbsize = DEV_BSIZE;
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*ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
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if (vd->vdev_wholedisk == 1) {
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uint64_t capacity = dkmext.dki_capacity - 1;
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uint64_t blksz = dkmext.dki_lbsize;
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int wce = 1;
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/*
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* If we own the whole disk, try to enable disk write caching.
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* We ignore errors because it's OK if we can't do it.
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*/
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(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
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FKIOCTL, kcred, NULL);
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*max_psize = *psize + vdev_disk_get_space(vd, capacity, blksz);
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zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
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"max_psize %llu", vd->vdev_path, *psize, *max_psize);
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} else {
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*max_psize = *psize;
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}
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/*
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* Clear the nowritecache bit, so that on a vdev_reopen() we will
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* try again.
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*/
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vd->vdev_nowritecache = B_FALSE;
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return (0);
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}
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static void
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vdev_disk_close(vdev_t *vd)
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{
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vdev_disk_t *dvd = vd->vdev_tsd;
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if (vd->vdev_reopening || dvd == NULL)
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return;
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if (dvd->vd_minor != NULL)
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ddi_devid_str_free(dvd->vd_minor);
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if (dvd->vd_devid != NULL)
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ddi_devid_free(dvd->vd_devid);
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if (dvd->vd_lh != NULL)
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(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
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vd->vdev_delayed_close = B_FALSE;
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kmem_free(dvd, sizeof (vdev_disk_t));
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vd->vdev_tsd = NULL;
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}
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int
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vdev_disk_physio(ldi_handle_t vd_lh, caddr_t data, size_t size,
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uint64_t offset, int flags)
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{
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buf_t *bp;
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int error = 0;
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if (vd_lh == NULL)
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return (SET_ERROR(EINVAL));
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ASSERT(flags & B_READ || flags & B_WRITE);
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bp = getrbuf(KM_SLEEP);
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bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
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bp->b_bcount = size;
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bp->b_un.b_addr = (void *)data;
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bp->b_lblkno = lbtodb(offset);
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bp->b_bufsize = size;
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error = ldi_strategy(vd_lh, bp);
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ASSERT(error == 0);
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if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
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error = SET_ERROR(EIO);
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freerbuf(bp);
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return (error);
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}
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static void
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vdev_disk_io_intr(buf_t *bp)
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{
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vdev_buf_t *vb = (vdev_buf_t *)bp;
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zio_t *zio = vb->vb_io;
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/*
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* The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
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* Rather than teach the rest of the stack about other error
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* possibilities (EFAULT, etc), we normalize the error value here.
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*/
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zio->io_error = (geterror(bp) != 0 ? EIO : 0);
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if (zio->io_error == 0 && bp->b_resid != 0)
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zio->io_error = SET_ERROR(EIO);
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kmem_free(vb, sizeof (vdev_buf_t));
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zio_interrupt(zio);
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}
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static void
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vdev_disk_ioctl_free(zio_t *zio)
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{
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kmem_free(zio->io_vsd, sizeof (struct dk_callback));
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}
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static const zio_vsd_ops_t vdev_disk_vsd_ops = {
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vdev_disk_ioctl_free,
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zio_vsd_default_cksum_report
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};
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static void
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vdev_disk_ioctl_done(void *zio_arg, int error)
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{
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zio_t *zio = zio_arg;
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zio->io_error = error;
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zio_interrupt(zio);
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}
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static int
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vdev_disk_io_start(zio_t *zio)
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{
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vdev_t *vd = zio->io_vd;
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vdev_disk_t *dvd = vd->vdev_tsd;
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vdev_buf_t *vb;
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struct dk_callback *dkc;
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buf_t *bp;
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int error;
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if (zio->io_type == ZIO_TYPE_IOCTL) {
|
|
/* XXPOLICY */
|
|
if (!vdev_readable(vd)) {
|
|
zio->io_error = SET_ERROR(ENXIO);
|
|
return (ZIO_PIPELINE_CONTINUE);
|
|
}
|
|
|
|
switch (zio->io_cmd) {
|
|
|
|
case DKIOCFLUSHWRITECACHE:
|
|
|
|
if (zfs_nocacheflush)
|
|
break;
|
|
|
|
if (vd->vdev_nowritecache) {
|
|
zio->io_error = SET_ERROR(ENOTSUP);
|
|
break;
|
|
}
|
|
|
|
zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
|
|
zio->io_vsd_ops = &vdev_disk_vsd_ops;
|
|
|
|
dkc->dkc_callback = vdev_disk_ioctl_done;
|
|
dkc->dkc_flag = FLUSH_VOLATILE;
|
|
dkc->dkc_cookie = zio;
|
|
|
|
error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
|
|
(uintptr_t)dkc, FKIOCTL, kcred, NULL);
|
|
|
|
if (error == 0) {
|
|
/*
|
|
* The ioctl will be done asychronously,
|
|
* and will call vdev_disk_ioctl_done()
|
|
* upon completion.
|
|
*/
|
|
return (ZIO_PIPELINE_STOP);
|
|
}
|
|
|
|
if (error == ENOTSUP || error == ENOTTY) {
|
|
/*
|
|
* If we get ENOTSUP or ENOTTY, we know that
|
|
* no future attempts will ever succeed.
|
|
* In this case we set a persistent bit so
|
|
* that we don't bother with the ioctl in the
|
|
* future.
|
|
*/
|
|
vd->vdev_nowritecache = B_TRUE;
|
|
}
|
|
zio->io_error = error;
|
|
|
|
break;
|
|
|
|
default:
|
|
zio->io_error = SET_ERROR(ENOTSUP);
|
|
}
|
|
|
|
return (ZIO_PIPELINE_CONTINUE);
|
|
}
|
|
|
|
vb = kmem_alloc(sizeof (vdev_buf_t), KM_SLEEP);
|
|
|
|
vb->vb_io = zio;
|
|
bp = &vb->vb_buf;
|
|
|
|
bioinit(bp);
|
|
bp->b_flags = B_BUSY | B_NOCACHE |
|
|
(zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE);
|
|
if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
|
|
bp->b_flags |= B_FAILFAST;
|
|
bp->b_bcount = zio->io_size;
|
|
bp->b_un.b_addr = zio->io_data;
|
|
bp->b_lblkno = lbtodb(zio->io_offset);
|
|
bp->b_bufsize = zio->io_size;
|
|
bp->b_iodone = (int (*)())vdev_disk_io_intr;
|
|
|
|
/* ldi_strategy() will return non-zero only on programming errors */
|
|
VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0);
|
|
|
|
return (ZIO_PIPELINE_STOP);
|
|
}
|
|
|
|
static void
|
|
vdev_disk_io_done(zio_t *zio)
|
|
{
|
|
vdev_t *vd = zio->io_vd;
|
|
|
|
/*
|
|
* 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
|
|
* asynchronous removal of the device. Otherwise, probe the device and
|
|
* make sure it's still accessible.
|
|
*/
|
|
if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
|
|
vdev_disk_t *dvd = vd->vdev_tsd;
|
|
int state = DKIO_NONE;
|
|
|
|
if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
|
|
FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
|
|
/*
|
|
* We post the resource as soon as possible, instead of
|
|
* when the async removal actually happens, because the
|
|
* DE is using this information to discard previous I/O
|
|
* errors.
|
|
*/
|
|
zfs_post_remove(zio->io_spa, vd);
|
|
vd->vdev_remove_wanted = B_TRUE;
|
|
spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
|
|
} else if (!vd->vdev_delayed_close) {
|
|
vd->vdev_delayed_close = B_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
vdev_ops_t vdev_disk_ops = {
|
|
vdev_disk_open,
|
|
vdev_disk_close,
|
|
vdev_default_asize,
|
|
vdev_disk_io_start,
|
|
vdev_disk_io_done,
|
|
NULL,
|
|
vdev_disk_hold,
|
|
vdev_disk_rele,
|
|
VDEV_TYPE_DISK, /* name of this vdev type */
|
|
B_TRUE /* leaf vdev */
|
|
};
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
ldi_handle_t vd_lh;
|
|
vdev_label_t *label;
|
|
uint64_t s, size;
|
|
int l;
|
|
ddi_devid_t tmpdevid;
|
|
int error = -1;
|
|
char *minor_name;
|
|
|
|
/*
|
|
* Read the device label and build the nvlist.
|
|
*/
|
|
if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
|
|
&minor_name) == 0) {
|
|
error = ldi_open_by_devid(tmpdevid, minor_name,
|
|
FREAD, kcred, &vd_lh, zfs_li);
|
|
ddi_devid_free(tmpdevid);
|
|
ddi_devid_str_free(minor_name);
|
|
}
|
|
|
|
if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
|
|
zfs_li)))
|
|
return (error);
|
|
|
|
if (ldi_get_size(vd_lh, &s)) {
|
|
(void) ldi_close(vd_lh, FREAD, kcred);
|
|
return (SET_ERROR(EIO));
|
|
}
|
|
|
|
size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
|
|
label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
|
|
|
|
*config = NULL;
|
|
for (l = 0; l < VDEV_LABELS; l++) {
|
|
uint64_t offset, state, txg = 0;
|
|
|
|
/* read vdev label */
|
|
offset = vdev_label_offset(size, l, 0);
|
|
if (vdev_disk_physio(vd_lh, (caddr_t)label,
|
|
VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_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;
|
|
}
|
|
|
|
kmem_free(label, sizeof (vdev_label_t));
|
|
(void) ldi_close(vd_lh, FREAD, kcred);
|
|
if (*config == NULL)
|
|
error = SET_ERROR(EIDRM);
|
|
|
|
return (error);
|
|
}
|