/* * 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 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #include #include #include /* * 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 (Error Numeric Association). * * 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]; int state; /* * 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; if (zio != NULL) { /* * Ignore any errors from I/Os that we are going to retry * anyway - we only generate errors from the final failure. * Checksum errors are generated after the pipeline stage * responsible for retrying the I/O (VDEV_IO_ASSESS), so this * only applies to standard I/O errors. */ if (zio_should_retry(zio) && zio->io_error != ECKSUM) return; /* * If this is not a read or write zio, ignore the error. This * can occur if the DKIOCFLUSHWRITECACHE ioctl fails. */ if (zio->io_type != ZIO_TYPE_READ && zio->io_type != ZIO_TYPE_WRITE) return; /* * Ignore any errors from speculative I/Os, as failure is an * expected result. */ if (zio->io_flags & ZIO_FLAG_SPECULATIVE) 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. */ /* * If we are importing a faulted pool, then we treat it like an open, * not an import. Otherwise, the DE will ignore all faults during * import, since the default behavior is to mark the devices as * persistently unavailable, not leave them in the faulted state. */ state = spa->spa_import_faulted ? SPA_LOAD_OPEN : spa->spa_load_state; /* * 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, state, NULL); if (spa != NULL) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE, DATA_TYPE_STRING, spa_get_failmode(spa) == ZIO_FAILURE_MODE_WAIT ? FM_EREPORT_FAILMODE_WAIT : spa_get_failmode(spa) == ZIO_FAILURE_MODE_CONTINUE ? FM_EREPORT_FAILMODE_CONTINUE : FM_EREPORT_FAILMODE_PANIC, 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, pvd->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, NULL); 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, NULL); } /* * 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_INT64, zio->io_logical->io_bookmark.zb_level, FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID, DATA_TYPE_UINT64, zio->io_logical->io_bookmark.zb_blkid, NULL); } 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 } static void zfs_post_common(spa_t *spa, vdev_t *vd, const char *name) { #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, name); 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 } /* * The 'resource.fs.zfs.removed' event is an internal signal that the given vdev * has been removed from the system. This will cause the DE to ignore any * recent I/O errors, inferring that they are due to the asynchronous device * removal. */ void zfs_post_remove(spa_t *spa, vdev_t *vd) { zfs_post_common(spa, vd, FM_RESOURCE_REMOVED); } /* * The 'resource.fs.zfs.autoreplace' event is an internal signal that the pool * has the 'autoreplace' property set, and therefore any broken vdevs will be * handled by higher level logic, and no vdev fault should be generated. */ void zfs_post_autoreplace(spa_t *spa, vdev_t *vd) { zfs_post_common(spa, vd, FM_RESOURCE_AUTOREPLACE); }