--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/uts/common/fs/zfs/zfs_fm.c Fri Mar 03 20:08:16 2006 -0800
@@ -0,0 +1,316 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+
+#include <sys/fm/fs/zfs.h>
+#include <sys/fm/protocol.h>
+#include <sys/fm/util.h>
+#include <sys/sysevent.h>
+
+/*
+ * This general routine is responsible for generating all the different ZFS
+ * ereports. The payload is dependent on the class, and which arguments are
+ * supplied to the function:
+ *
+ * EREPORT POOL VDEV IO
+ * block X X X
+ * data X X
+ * device X X
+ * pool X
+ *
+ * If we are in a loading state, all errors are chained together by the same
+ * SPA-wide ENA.
+ *
+ * For isolated I/O requests, we get the ENA from the zio_t. The propagation
+ * gets very complicated due to RAID-Z, gang blocks, and vdev caching. We want
+ * to chain together all ereports associated with a logical piece of data. For
+ * read I/Os, there are basically three 'types' of I/O, which form a roughly
+ * layered diagram:
+ *
+ * +---------------+
+ * | Aggregate I/O | No associated logical data or device
+ * +---------------+
+ * |
+ * V
+ * +---------------+ Reads associated with a piece of logical data.
+ * | Read I/O | This includes reads on behalf of RAID-Z,
+ * +---------------+ mirrors, gang blocks, retries, etc.
+ * |
+ * V
+ * +---------------+ Reads associated with a particular device, but
+ * | Physical I/O | no logical data. Issued as part of vdev caching
+ * +---------------+ and I/O aggregation.
+ *
+ * Note that 'physical I/O' here is not the same terminology as used in the rest
+ * of ZIO. Typically, 'physical I/O' simply means that there is no attached
+ * blockpointer. But I/O with no associated block pointer can still be related
+ * to a logical piece of data (i.e. RAID-Z requests).
+ *
+ * Purely physical I/O always have unique ENAs. They are not related to a
+ * particular piece of logical data, and therefore cannot be chained together.
+ * We still generate an ereport, but the DE doesn't correlate it with any
+ * logical piece of data. When such an I/O fails, the delegated I/O requests
+ * will issue a retry, which will trigger the 'real' ereport with the correct
+ * ENA.
+ *
+ * We keep track of the ENA for a ZIO chain through the 'io_logical' member.
+ * When a new logical I/O is issued, we set this to point to itself. Child I/Os
+ * then inherit this pointer, so that when it is first set subsequent failures
+ * will use the same ENA. If a physical I/O is issued (by passing the
+ * ZIO_FLAG_NOBOOKMARK flag), then this pointer is reset, guaranteeing that a
+ * unique ENA will be generated. For an aggregate I/O, this pointer is set to
+ * NULL, and no ereport will be generated (since it doesn't actually correspond
+ * to any particular device or piece of data).
+ */
+void
+zfs_ereport_post(const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
+ uint64_t stateoroffset, uint64_t size)
+{
+#ifdef _KERNEL
+ nvlist_t *ereport, *detector;
+ uint64_t ena;
+ char class[64];
+
+ /*
+ * If we are doing a spa_tryimport(), ignore errors.
+ */
+ if (spa->spa_load_state == SPA_LOAD_TRYIMPORT)
+ return;
+
+ /*
+ * If we are in the middle of opening a pool, and the previous attempt
+ * failed, don't bother logging any new ereports - we're just going to
+ * get the same diagnosis anyway.
+ */
+ if (spa->spa_load_state != SPA_LOAD_NONE &&
+ spa->spa_last_open_failed)
+ return;
+
+ /*
+ * Ignore any errors from I/Os that we are going to retry anyway - we
+ * only generate errors from the final failure.
+ */
+ if (zio && zio_should_retry(zio))
+ return;
+
+ if ((ereport = fm_nvlist_create(NULL)) == NULL)
+ return;
+
+ if ((detector = fm_nvlist_create(NULL)) == NULL) {
+ fm_nvlist_destroy(ereport, FM_NVA_FREE);
+ return;
+ }
+
+ /*
+ * Serialize ereport generation
+ */
+ mutex_enter(&spa->spa_errlist_lock);
+
+ /*
+ * Determine the ENA to use for this event. If we are in a loading
+ * state, use a SPA-wide ENA. Otherwise, if we are in an I/O state, use
+ * a root zio-wide ENA. Otherwise, simply use a unique ENA.
+ */
+ if (spa->spa_load_state != SPA_LOAD_NONE) {
+ if (spa->spa_ena == 0)
+ spa->spa_ena = fm_ena_generate(0, FM_ENA_FMT1);
+ ena = spa->spa_ena;
+ } else if (zio != NULL && zio->io_logical != NULL) {
+ if (zio->io_logical->io_ena == 0)
+ zio->io_logical->io_ena =
+ fm_ena_generate(0, FM_ENA_FMT1);
+ ena = zio->io_logical->io_ena;
+ } else {
+ ena = fm_ena_generate(0, FM_ENA_FMT1);
+ }
+
+ /*
+ * Construct the full class, detector, and other standard FMA fields.
+ */
+ (void) snprintf(class, sizeof (class), "%s.%s",
+ ZFS_ERROR_CLASS, subclass);
+
+ fm_fmri_zfs_set(detector, FM_ZFS_SCHEME_VERSION, spa_guid(spa),
+ vd != NULL ? vd->vdev_guid : 0);
+
+ fm_ereport_set(ereport, FM_EREPORT_VERSION, class, ena, detector, NULL);
+
+ /*
+ * Construct the per-ereport payload, depending on which parameters are
+ * passed in.
+ */
+
+ /*
+ * Generic payload members common to all ereports.
+ *
+ * The direct reference to spa_name is used rather than spa_name()
+ * because of the asynchronous nature of the zio pipeline. spa_name()
+ * asserts that the config lock is held in some form. This is always
+ * the case in I/O context, but because the check for RW_WRITER compares
+ * against 'curthread', we may be in an asynchronous context and blow
+ * this assert. Rather than loosen this assert, we acknowledge that all
+ * contexts in which this function is called (pool open, I/O) are safe,
+ * and dereference the name directly.
+ */
+ fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL,
+ DATA_TYPE_STRING, spa->spa_name, FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
+ DATA_TYPE_UINT64, spa_guid(spa),
+ FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, DATA_TYPE_INT32,
+ spa->spa_load_state, NULL);
+
+ if (vd != NULL) {
+ vdev_t *pvd = vd->vdev_parent;
+
+ fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
+ DATA_TYPE_UINT64, vd->vdev_guid,
+ FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
+ DATA_TYPE_STRING, vd->vdev_ops->vdev_op_type, NULL);
+ if (vd->vdev_path)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH,
+ DATA_TYPE_STRING, vd->vdev_path, NULL);
+ if (vd->vdev_devid)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID,
+ DATA_TYPE_STRING, vd->vdev_devid, NULL);
+
+ if (pvd != NULL) {
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID,
+ DATA_TYPE_UINT64, pvd->vdev_guid,
+ FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE,
+ DATA_TYPE_STRING, pvd->vdev_ops->vdev_op_type,
+ NULL);
+ if (pvd->vdev_path)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_PARENT_PATH,
+ DATA_TYPE_STRING, vd->vdev_path, NULL);
+ if (pvd->vdev_devid)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_PARENT_DEVID,
+ DATA_TYPE_STRING, pvd->vdev_devid, NULL);
+ }
+ }
+
+ if (zio != NULL) {
+ /*
+ * Payload common to all I/Os.
+ */
+ fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR,
+ DATA_TYPE_INT32, zio->io_error, NULL);
+
+ /*
+ * If the 'size' parameter is non-zero, it indicates this is a
+ * RAID-Z or other I/O where the physical offset and length are
+ * provided for us, instead of within the zio_t.
+ */
+ if (vd != NULL) {
+ if (size)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
+ DATA_TYPE_UINT64, stateoroffset,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
+ DATA_TYPE_UINT64, size);
+ else
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
+ DATA_TYPE_UINT64, zio->io_offset,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
+ DATA_TYPE_UINT64, zio->io_size);
+ }
+
+ /*
+ * Payload for I/Os with corresponding logical information.
+ */
+ if (zio->io_logical != NULL)
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET,
+ DATA_TYPE_UINT64,
+ zio->io_logical->io_bookmark.zb_objset,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT,
+ DATA_TYPE_UINT64,
+ zio->io_logical->io_bookmark.zb_object,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL,
+ DATA_TYPE_INT32,
+ zio->io_logical->io_bookmark.zb_level,
+ FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID,
+ DATA_TYPE_UINT64,
+ zio->io_logical->io_bookmark.zb_blkid);
+ } else if (vd != NULL) {
+ /*
+ * If we have a vdev but no zio, this is a device fault, and the
+ * 'stateoroffset' parameter indicates the previous state of the
+ * vdev.
+ */
+ fm_payload_set(ereport,
+ FM_EREPORT_PAYLOAD_ZFS_PREV_STATE,
+ DATA_TYPE_UINT64, stateoroffset, NULL);
+ }
+ mutex_exit(&spa->spa_errlist_lock);
+
+ fm_ereport_post(ereport, EVCH_SLEEP);
+
+ fm_nvlist_destroy(ereport, FM_NVA_FREE);
+ fm_nvlist_destroy(detector, FM_NVA_FREE);
+#endif
+}
+
+/*
+ * The 'resource.fs.zfs.ok' event is an internal signal that the associated
+ * resource (pool or disk) has been identified by ZFS as healthy. This will
+ * then trigger the DE to close the associated case, if any.
+ */
+void
+zfs_post_ok(spa_t *spa, vdev_t *vd)
+{
+#ifdef _KERNEL
+ nvlist_t *resource;
+ char class[64];
+
+ if ((resource = fm_nvlist_create(NULL)) == NULL)
+ return;
+
+ (void) snprintf(class, sizeof (class), "%s.%s.%s", FM_RSRC_RESOURCE,
+ ZFS_ERROR_CLASS, FM_RESOURCE_OK);
+ VERIFY(nvlist_add_uint8(resource, FM_VERSION, FM_RSRC_VERSION) == 0);
+ VERIFY(nvlist_add_string(resource, FM_CLASS, class) == 0);
+ VERIFY(nvlist_add_uint64(resource,
+ FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, spa_guid(spa)) == 0);
+ if (vd)
+ VERIFY(nvlist_add_uint64(resource,
+ FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, vd->vdev_guid) == 0);
+
+ fm_ereport_post(resource, EVCH_SLEEP);
+
+ fm_nvlist_destroy(resource, FM_NVA_FREE);
+#endif
+}