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The phase 2 work primarily entails the Diagnosis Engine and the Retire Agent modules. It also includes infrastructure to support a crude FMD environment to host these modules. The Diagnosis Engine consumes I/O and checksum ereports and feeds them into a SERD engine which will generate a corres- ponding fault diagnosis when the SERD engine fires. All the diagnosis state data is collected into cases, one case per vdev being tracked. The Retire Agent responds to diagnosed faults by isolating the faulty VDEV. It will notify the ZFS kernel module of the new VDEV state (degraded or faulted). This agent is also responsible for managing hot spares across pools. When it encounters a device fault or a device removal it replaces the device with an appropriate spare if available. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Don Brady <don.brady@intel.com> Closes #5343
87 lines
2.8 KiB
C
87 lines
2.8 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, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* 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 2004 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2016, Intel Corporation.
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*/
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#ifndef _FMD_SERD_H
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#define _FMD_SERD_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/list.h>
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#include <sys/time.h>
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typedef struct fmd_serd_elem {
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list_node_t se_list; /* linked list forward/back pointers */
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hrtime_t se_hrt; /* upper bound on event hrtime */
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} fmd_serd_elem_t;
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typedef struct fmd_serd_eng {
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char *sg_name; /* string name for this engine */
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struct fmd_serd_eng *sg_next; /* next engine on hash chain */
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list_t sg_list; /* list of fmd_serd_elem_t's */
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uint_t sg_count; /* count of events in sg_list */
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uint_t sg_flags; /* engine flags (see below) */
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uint_t sg_n; /* engine N parameter (event count) */
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hrtime_t sg_t; /* engine T parameter (nanoseconds) */
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} fmd_serd_eng_t;
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#define FMD_SERD_FIRED 0x1 /* error rate has exceeded threshold */
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#define FMD_SERD_DIRTY 0x2 /* engine needs to be checkpointed */
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typedef void fmd_serd_eng_f(fmd_serd_eng_t *, void *);
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typedef struct fmd_serd_hash {
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fmd_serd_eng_t **sh_hash; /* hash bucket array for buffers */
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uint_t sh_hashlen; /* length of hash bucket array */
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uint_t sh_count; /* count of engines in hash */
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} fmd_serd_hash_t;
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extern void fmd_serd_hash_create(fmd_serd_hash_t *);
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extern void fmd_serd_hash_destroy(fmd_serd_hash_t *);
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extern void fmd_serd_hash_apply(fmd_serd_hash_t *, fmd_serd_eng_f *, void *);
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extern fmd_serd_eng_t *fmd_serd_eng_insert(fmd_serd_hash_t *,
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const char *, uint32_t, hrtime_t);
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extern fmd_serd_eng_t *fmd_serd_eng_lookup(fmd_serd_hash_t *, const char *);
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extern void fmd_serd_eng_delete(fmd_serd_hash_t *, const char *);
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extern int fmd_serd_eng_record(fmd_serd_eng_t *, hrtime_t);
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extern int fmd_serd_eng_fired(fmd_serd_eng_t *);
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extern int fmd_serd_eng_empty(fmd_serd_eng_t *);
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extern void fmd_serd_eng_reset(fmd_serd_eng_t *);
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extern void fmd_serd_eng_gc(fmd_serd_eng_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FMD_SERD_H */
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