363 lines
11 KiB
C
363 lines
11 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 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <sys/spa.h>
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#include <sys/spa_impl.h>
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#include <sys/vdev.h>
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#include <sys/vdev_impl.h>
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#include <sys/zio.h>
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#include <sys/fm/fs/zfs.h>
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#include <sys/fm/protocol.h>
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#include <sys/fm/util.h>
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#include <sys/sysevent.h>
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/*
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* This general routine is responsible for generating all the different ZFS
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* ereports. The payload is dependent on the class, and which arguments are
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* supplied to the function:
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*
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* EREPORT POOL VDEV IO
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* block X X X
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* data X X
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* device X X
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* pool X
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*
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* If we are in a loading state, all errors are chained together by the same
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* SPA-wide ENA (Error Numeric Association).
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*
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* For isolated I/O requests, we get the ENA from the zio_t. The propagation
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* gets very complicated due to RAID-Z, gang blocks, and vdev caching. We want
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* to chain together all ereports associated with a logical piece of data. For
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* read I/Os, there are basically three 'types' of I/O, which form a roughly
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* layered diagram:
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*
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* +---------------+
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* | Aggregate I/O | No associated logical data or device
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* +---------------+
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* |
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* V
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* +---------------+ Reads associated with a piece of logical data.
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* | Read I/O | This includes reads on behalf of RAID-Z,
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* +---------------+ mirrors, gang blocks, retries, etc.
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* |
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* V
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* +---------------+ Reads associated with a particular device, but
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* | Physical I/O | no logical data. Issued as part of vdev caching
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* +---------------+ and I/O aggregation.
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*
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* Note that 'physical I/O' here is not the same terminology as used in the rest
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* of ZIO. Typically, 'physical I/O' simply means that there is no attached
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* blockpointer. But I/O with no associated block pointer can still be related
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* to a logical piece of data (i.e. RAID-Z requests).
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*
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* Purely physical I/O always have unique ENAs. They are not related to a
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* particular piece of logical data, and therefore cannot be chained together.
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* We still generate an ereport, but the DE doesn't correlate it with any
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* logical piece of data. When such an I/O fails, the delegated I/O requests
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* will issue a retry, which will trigger the 'real' ereport with the correct
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* ENA.
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*
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* We keep track of the ENA for a ZIO chain through the 'io_logical' member.
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* When a new logical I/O is issued, we set this to point to itself. Child I/Os
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* then inherit this pointer, so that when it is first set subsequent failures
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* will use the same ENA. For vdev cache fill and queue aggregation I/O,
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* this pointer is set to NULL, and no ereport will be generated (since it
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* doesn't actually correspond to any particular device or piece of data,
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* and the caller will always retry without caching or queueing anyway).
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*/
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void
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zfs_ereport_post(const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
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uint64_t stateoroffset, uint64_t size)
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{
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#ifdef _KERNEL
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nvlist_t *ereport, *detector;
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uint64_t ena;
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char class[64];
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int state;
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/*
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* If we are doing a spa_tryimport(), ignore errors.
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*/
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if (spa->spa_load_state == SPA_LOAD_TRYIMPORT)
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return;
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/*
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* If we are in the middle of opening a pool, and the previous attempt
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* failed, don't bother logging any new ereports - we're just going to
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* get the same diagnosis anyway.
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*/
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if (spa->spa_load_state != SPA_LOAD_NONE &&
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spa->spa_last_open_failed)
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return;
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if (zio != NULL) {
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/*
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* If this is not a read or write zio, ignore the error. This
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* can occur if the DKIOCFLUSHWRITECACHE ioctl fails.
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*/
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if (zio->io_type != ZIO_TYPE_READ &&
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zio->io_type != ZIO_TYPE_WRITE)
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return;
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/*
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* Ignore any errors from speculative I/Os, as failure is an
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* expected result.
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*/
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if (zio->io_flags & ZIO_FLAG_SPECULATIVE)
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return;
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/*
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* If the vdev has already been marked as failing due to a
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* failed probe, then ignore any subsequent I/O errors, as the
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* DE will automatically fault the vdev on the first such
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* failure.
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*/
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if (vd != NULL &&
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(!vdev_readable(vd) || !vdev_writeable(vd)) &&
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strcmp(subclass, FM_EREPORT_ZFS_PROBE_FAILURE) != 0)
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return;
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}
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if ((ereport = fm_nvlist_create(NULL)) == NULL)
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return;
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if ((detector = fm_nvlist_create(NULL)) == NULL) {
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fm_nvlist_destroy(ereport, FM_NVA_FREE);
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return;
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}
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/*
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* Serialize ereport generation
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*/
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mutex_enter(&spa->spa_errlist_lock);
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/*
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* Determine the ENA to use for this event. If we are in a loading
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* state, use a SPA-wide ENA. Otherwise, if we are in an I/O state, use
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* a root zio-wide ENA. Otherwise, simply use a unique ENA.
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*/
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if (spa->spa_load_state != SPA_LOAD_NONE) {
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if (spa->spa_ena == 0)
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spa->spa_ena = fm_ena_generate(0, FM_ENA_FMT1);
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ena = spa->spa_ena;
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} else if (zio != NULL && zio->io_logical != NULL) {
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if (zio->io_logical->io_ena == 0)
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zio->io_logical->io_ena =
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fm_ena_generate(0, FM_ENA_FMT1);
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ena = zio->io_logical->io_ena;
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} else {
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ena = fm_ena_generate(0, FM_ENA_FMT1);
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}
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/*
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* Construct the full class, detector, and other standard FMA fields.
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*/
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(void) snprintf(class, sizeof (class), "%s.%s",
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ZFS_ERROR_CLASS, subclass);
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fm_fmri_zfs_set(detector, FM_ZFS_SCHEME_VERSION, spa_guid(spa),
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vd != NULL ? vd->vdev_guid : 0);
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fm_ereport_set(ereport, FM_EREPORT_VERSION, class, ena, detector, NULL);
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/*
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* Construct the per-ereport payload, depending on which parameters are
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* passed in.
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*/
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/*
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* If we are importing a faulted pool, then we treat it like an open,
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* not an import. Otherwise, the DE will ignore all faults during
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* import, since the default behavior is to mark the devices as
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* persistently unavailable, not leave them in the faulted state.
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*/
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state = spa->spa_import_faulted ? SPA_LOAD_OPEN : spa->spa_load_state;
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/*
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* Generic payload members common to all ereports.
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*/
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fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL,
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DATA_TYPE_STRING, spa_name(spa), FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
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DATA_TYPE_UINT64, spa_guid(spa),
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FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, DATA_TYPE_INT32,
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state, NULL);
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if (spa != NULL) {
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fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE,
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DATA_TYPE_STRING,
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spa_get_failmode(spa) == ZIO_FAILURE_MODE_WAIT ?
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FM_EREPORT_FAILMODE_WAIT :
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spa_get_failmode(spa) == ZIO_FAILURE_MODE_CONTINUE ?
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FM_EREPORT_FAILMODE_CONTINUE : FM_EREPORT_FAILMODE_PANIC,
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NULL);
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}
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if (vd != NULL) {
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vdev_t *pvd = vd->vdev_parent;
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fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
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DATA_TYPE_UINT64, vd->vdev_guid,
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FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
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DATA_TYPE_STRING, vd->vdev_ops->vdev_op_type, NULL);
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if (vd->vdev_path)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH,
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DATA_TYPE_STRING, vd->vdev_path, NULL);
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if (vd->vdev_devid)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID,
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DATA_TYPE_STRING, vd->vdev_devid, NULL);
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if (pvd != NULL) {
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID,
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DATA_TYPE_UINT64, pvd->vdev_guid,
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FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE,
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DATA_TYPE_STRING, pvd->vdev_ops->vdev_op_type,
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NULL);
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if (pvd->vdev_path)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_PARENT_PATH,
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DATA_TYPE_STRING, pvd->vdev_path, NULL);
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if (pvd->vdev_devid)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_PARENT_DEVID,
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DATA_TYPE_STRING, pvd->vdev_devid, NULL);
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}
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}
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if (zio != NULL) {
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/*
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* Payload common to all I/Os.
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*/
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fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR,
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DATA_TYPE_INT32, zio->io_error, NULL);
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/*
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* If the 'size' parameter is non-zero, it indicates this is a
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* RAID-Z or other I/O where the physical offset and length are
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* provided for us, instead of within the zio_t.
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*/
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if (vd != NULL) {
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if (size)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
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DATA_TYPE_UINT64, stateoroffset,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
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DATA_TYPE_UINT64, size, NULL);
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else
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
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DATA_TYPE_UINT64, zio->io_offset,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
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DATA_TYPE_UINT64, zio->io_size, NULL);
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}
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/*
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* Payload for I/Os with corresponding logical information.
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*/
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if (zio->io_logical != NULL)
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET,
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DATA_TYPE_UINT64,
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zio->io_logical->io_bookmark.zb_objset,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT,
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DATA_TYPE_UINT64,
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zio->io_logical->io_bookmark.zb_object,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL,
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DATA_TYPE_INT64,
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zio->io_logical->io_bookmark.zb_level,
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FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID,
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DATA_TYPE_UINT64,
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zio->io_logical->io_bookmark.zb_blkid, NULL);
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} else if (vd != NULL) {
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/*
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* If we have a vdev but no zio, this is a device fault, and the
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* 'stateoroffset' parameter indicates the previous state of the
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* vdev.
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*/
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fm_payload_set(ereport,
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FM_EREPORT_PAYLOAD_ZFS_PREV_STATE,
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DATA_TYPE_UINT64, stateoroffset, NULL);
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}
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mutex_exit(&spa->spa_errlist_lock);
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fm_ereport_post(ereport, EVCH_SLEEP);
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fm_nvlist_destroy(ereport, FM_NVA_FREE);
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fm_nvlist_destroy(detector, FM_NVA_FREE);
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#endif
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}
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static void
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zfs_post_common(spa_t *spa, vdev_t *vd, const char *name)
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{
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#ifdef _KERNEL
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nvlist_t *resource;
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char class[64];
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if ((resource = fm_nvlist_create(NULL)) == NULL)
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return;
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(void) snprintf(class, sizeof (class), "%s.%s.%s", FM_RSRC_RESOURCE,
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ZFS_ERROR_CLASS, name);
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VERIFY(nvlist_add_uint8(resource, FM_VERSION, FM_RSRC_VERSION) == 0);
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VERIFY(nvlist_add_string(resource, FM_CLASS, class) == 0);
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VERIFY(nvlist_add_uint64(resource,
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FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, spa_guid(spa)) == 0);
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if (vd)
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VERIFY(nvlist_add_uint64(resource,
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FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, vd->vdev_guid) == 0);
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fm_ereport_post(resource, EVCH_SLEEP);
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fm_nvlist_destroy(resource, FM_NVA_FREE);
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#endif
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}
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/*
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* The 'resource.fs.zfs.removed' event is an internal signal that the given vdev
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* has been removed from the system. This will cause the DE to ignore any
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* recent I/O errors, inferring that they are due to the asynchronous device
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* removal.
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*/
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void
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zfs_post_remove(spa_t *spa, vdev_t *vd)
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{
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zfs_post_common(spa, vd, FM_RESOURCE_REMOVED);
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}
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/*
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* The 'resource.fs.zfs.autoreplace' event is an internal signal that the pool
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* has the 'autoreplace' property set, and therefore any broken vdevs will be
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* handled by higher level logic, and no vdev fault should be generated.
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*/
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void
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zfs_post_autoreplace(spa_t *spa, vdev_t *vd)
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{
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zfs_post_common(spa, vd, FM_RESOURCE_AUTOREPLACE);
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}
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