2008-11-20 20:01:55 +00:00
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/*
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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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/*
|
2010-05-28 20:45:14 +00:00
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
2013-03-08 18:41:28 +00:00
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* Copyright (c) 2013 by Delphix. All rights reserved.
|
2011-11-11 22:07:54 +00:00
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* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
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2008-11-20 20:01:55 +00:00
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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/zio.h>
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#include <sys/zio_checksum.h>
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#include <sys/zio_compress.h>
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#include <sys/dmu.h>
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#include <sys/dmu_tx.h>
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#include <sys/zap.h>
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#include <sys/zil.h>
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#include <sys/vdev_impl.h>
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#include <sys/metaslab.h>
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#include <sys/uberblock_impl.h>
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#include <sys/txg.h>
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#include <sys/avl.h>
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#include <sys/unique.h>
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#include <sys/dsl_pool.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_prop.h>
|
2010-08-26 18:42:43 +00:00
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#include <sys/fm/util.h>
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2010-05-28 20:45:14 +00:00
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#include <sys/dsl_scan.h>
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2008-11-20 20:01:55 +00:00
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#include <sys/fs/zfs.h>
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#include <sys/metaslab_impl.h>
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2008-12-03 20:09:06 +00:00
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#include <sys/arc.h>
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2010-05-28 20:45:14 +00:00
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#include <sys/ddt.h>
|
Add visibility in to arc_read
This change is an attempt to add visibility into the arc_read calls
occurring on a system, in real time. To do this, a list was added to the
in memory SPA data structure for a pool, with each element on the list
corresponding to a call to arc_read. These entries are then exported
through the kstat interface, which can then be interpreted in userspace.
For each arc_read call, the following information is exported:
* A unique identifier (uint64_t)
* The time the entry was added to the list (hrtime_t)
(*not* wall clock time; relative to the other entries on the list)
* The objset ID (uint64_t)
* The object number (uint64_t)
* The indirection level (uint64_t)
* The block ID (uint64_t)
* The name of the function originating the arc_read call (char[24])
* The arc_flags from the arc_read call (uint32_t)
* The PID of the reading thread (pid_t)
* The command or name of thread originating read (char[16])
From this exported information one can see, in real time, exactly what
is being read, what function is generating the read, and whether or not
the read was found to be already cached.
There is still some work to be done, but this should serve as a good
starting point.
Specifically, dbuf_read's are not accounted for in the currently
exported information. Thus, a follow up patch should probably be added
to export these calls that never call into arc_read (they only hit the
dbuf hash table). In addition, it might be nice to create a utility
similar to "arcstat.py" to digest the exported information and display
it in a more readable format. Or perhaps, log the information and allow
for it to be "replayed" at a later time.
Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2013-09-06 23:09:05 +00:00
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#include <sys/kstat.h>
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2008-11-20 20:01:55 +00:00
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#include "zfs_prop.h"
|
2012-12-13 23:24:15 +00:00
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#include "zfeature_common.h"
|
2008-11-20 20:01:55 +00:00
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/*
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* SPA locking
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*
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* There are four basic locks for managing spa_t structures:
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*
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* spa_namespace_lock (global mutex)
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*
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* This lock must be acquired to do any of the following:
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*
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* - Lookup a spa_t by name
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* - Add or remove a spa_t from the namespace
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* - Increase spa_refcount from non-zero
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* - Check if spa_refcount is zero
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* - Rename a spa_t
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* - add/remove/attach/detach devices
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* - Held for the duration of create/destroy/import/export
|
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*
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* It does not need to handle recursion. A create or destroy may
|
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|
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* reference objects (files or zvols) in other pools, but by
|
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|
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* definition they must have an existing reference, and will never need
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* to lookup a spa_t by name.
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*
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* spa_refcount (per-spa refcount_t protected by mutex)
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*
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* This reference count keep track of any active users of the spa_t. The
|
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* spa_t cannot be destroyed or freed while this is non-zero. Internally,
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* the refcount is never really 'zero' - opening a pool implicitly keeps
|
2008-12-03 20:09:06 +00:00
|
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* some references in the DMU. Internally we check against spa_minref, but
|
2008-11-20 20:01:55 +00:00
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|
* present the image of a zero/non-zero value to consumers.
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*
|
2008-12-03 20:09:06 +00:00
|
|
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* spa_config_lock[] (per-spa array of rwlocks)
|
2008-11-20 20:01:55 +00:00
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*
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* This protects the spa_t from config changes, and must be held in
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* the following circumstances:
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*
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* - RW_READER to perform I/O to the spa
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* - RW_WRITER to change the vdev config
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*
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* The locking order is fairly straightforward:
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*
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* spa_namespace_lock -> spa_refcount
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*
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* The namespace lock must be acquired to increase the refcount from 0
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* or to check if it is zero.
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*
|
2008-12-03 20:09:06 +00:00
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* spa_refcount -> spa_config_lock[]
|
2008-11-20 20:01:55 +00:00
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*
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* There must be at least one valid reference on the spa_t to acquire
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* the config lock.
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*
|
2008-12-03 20:09:06 +00:00
|
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* spa_namespace_lock -> spa_config_lock[]
|
2008-11-20 20:01:55 +00:00
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*
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* The namespace lock must always be taken before the config lock.
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*
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*
|
2008-12-03 20:09:06 +00:00
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* The spa_namespace_lock can be acquired directly and is globally visible.
|
2008-11-20 20:01:55 +00:00
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*
|
2008-12-03 20:09:06 +00:00
|
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* The namespace is manipulated using the following functions, all of which
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* require the spa_namespace_lock to be held.
|
2008-11-20 20:01:55 +00:00
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*
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* spa_lookup() Lookup a spa_t by name.
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*
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* spa_add() Create a new spa_t in the namespace.
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*
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* spa_remove() Remove a spa_t from the namespace. This also
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* frees up any memory associated with the spa_t.
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*
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* spa_next() Returns the next spa_t in the system, or the
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* first if NULL is passed.
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*
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* spa_evict_all() Shutdown and remove all spa_t structures in
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* the system.
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*
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* spa_guid_exists() Determine whether a pool/device guid exists.
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*
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* The spa_refcount is manipulated using the following functions:
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*
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* spa_open_ref() Adds a reference to the given spa_t. Must be
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* called with spa_namespace_lock held if the
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* refcount is currently zero.
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*
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* spa_close() Remove a reference from the spa_t. This will
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* not free the spa_t or remove it from the
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* namespace. No locking is required.
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*
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* spa_refcount_zero() Returns true if the refcount is currently
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* zero. Must be called with spa_namespace_lock
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* held.
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*
|
2008-12-03 20:09:06 +00:00
|
|
|
* The spa_config_lock[] is an array of rwlocks, ordered as follows:
|
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|
|
* SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV.
|
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|
|
* spa_config_lock[] is manipulated with spa_config_{enter,exit,held}().
|
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|
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*
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|
* To read the configuration, it suffices to hold one of these locks as reader.
|
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|
* To modify the configuration, you must hold all locks as writer. To modify
|
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|
|
* vdev state without altering the vdev tree's topology (e.g. online/offline),
|
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|
* you must hold SCL_STATE and SCL_ZIO as writer.
|
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*
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|
* We use these distinct config locks to avoid recursive lock entry.
|
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|
* For example, spa_sync() (which holds SCL_CONFIG as reader) induces
|
|
|
|
* block allocations (SCL_ALLOC), which may require reading space maps
|
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|
* from disk (dmu_read() -> zio_read() -> SCL_ZIO).
|
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*
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* The spa config locks cannot be normal rwlocks because we need the
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* ability to hand off ownership. For example, SCL_ZIO is acquired
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* by the issuing thread and later released by an interrupt thread.
|
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|
|
* They do, however, obey the usual write-wanted semantics to prevent
|
|
|
|
* writer (i.e. system administrator) starvation.
|
|
|
|
*
|
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|
|
* The lock acquisition rules are as follows:
|
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|
*
|
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|
|
* SCL_CONFIG
|
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|
|
* Protects changes to the vdev tree topology, such as vdev
|
|
|
|
* add/remove/attach/detach. Protects the dirty config list
|
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|
|
* (spa_config_dirty_list) and the set of spares and l2arc devices.
|
|
|
|
*
|
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|
|
* SCL_STATE
|
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|
|
* Protects changes to pool state and vdev state, such as vdev
|
|
|
|
* online/offline/fault/degrade/clear. Protects the dirty state list
|
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|
|
* (spa_state_dirty_list) and global pool state (spa_state).
|
|
|
|
*
|
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|
|
* SCL_ALLOC
|
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|
|
* Protects changes to metaslab groups and classes.
|
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|
|
* Held as reader by metaslab_alloc() and metaslab_claim().
|
|
|
|
*
|
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|
|
* SCL_ZIO
|
|
|
|
* Held by bp-level zios (those which have no io_vd upon entry)
|
|
|
|
* to prevent changes to the vdev tree. The bp-level zio implicitly
|
|
|
|
* protects all of its vdev child zios, which do not hold SCL_ZIO.
|
|
|
|
*
|
|
|
|
* SCL_FREE
|
|
|
|
* Protects changes to metaslab groups and classes.
|
|
|
|
* Held as reader by metaslab_free(). SCL_FREE is distinct from
|
|
|
|
* SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free
|
|
|
|
* blocks in zio_done() while another i/o that holds either
|
|
|
|
* SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete.
|
|
|
|
*
|
|
|
|
* SCL_VDEV
|
|
|
|
* Held as reader to prevent changes to the vdev tree during trivial
|
2010-05-28 20:45:14 +00:00
|
|
|
* inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the
|
2008-12-03 20:09:06 +00:00
|
|
|
* other locks, and lower than all of them, to ensure that it's safe
|
|
|
|
* to acquire regardless of caller context.
|
|
|
|
*
|
|
|
|
* In addition, the following rules apply:
|
|
|
|
*
|
|
|
|
* (a) spa_props_lock protects pool properties, spa_config and spa_config_list.
|
|
|
|
* The lock ordering is SCL_CONFIG > spa_props_lock.
|
|
|
|
*
|
|
|
|
* (b) I/O operations on leaf vdevs. For any zio operation that takes
|
|
|
|
* an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(),
|
|
|
|
* or zio_write_phys() -- the caller must ensure that the config cannot
|
|
|
|
* cannot change in the interim, and that the vdev cannot be reopened.
|
|
|
|
* SCL_STATE as reader suffices for both.
|
2008-11-20 20:01:55 +00:00
|
|
|
*
|
|
|
|
* The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit().
|
|
|
|
*
|
|
|
|
* spa_vdev_enter() Acquire the namespace lock and the config lock
|
|
|
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* for writing.
|
|
|
|
*
|
|
|
|
* spa_vdev_exit() Release the config lock, wait for all I/O
|
|
|
|
* to complete, sync the updated configs to the
|
|
|
|
* cache, and release the namespace lock.
|
|
|
|
*
|
2008-12-03 20:09:06 +00:00
|
|
|
* vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit().
|
|
|
|
* Like spa_vdev_enter/exit, these are convenience wrappers -- the actual
|
|
|
|
* locking is, always, based on spa_namespace_lock and spa_config_lock[].
|
|
|
|
*
|
2012-12-13 23:24:15 +00:00
|
|
|
* spa_rename() is also implemented within this file since it requires
|
2008-12-03 20:09:06 +00:00
|
|
|
* manipulation of the namespace.
|
2008-11-20 20:01:55 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
static avl_tree_t spa_namespace_avl;
|
|
|
|
kmutex_t spa_namespace_lock;
|
|
|
|
static kcondvar_t spa_namespace_cv;
|
|
|
|
static int spa_active_count;
|
|
|
|
int spa_max_replication_override = SPA_DVAS_PER_BP;
|
|
|
|
|
|
|
|
static kmutex_t spa_spare_lock;
|
|
|
|
static avl_tree_t spa_spare_avl;
|
|
|
|
static kmutex_t spa_l2cache_lock;
|
|
|
|
static avl_tree_t spa_l2cache_avl;
|
|
|
|
|
|
|
|
kmem_cache_t *spa_buffer_pool;
|
2009-01-15 21:59:39 +00:00
|
|
|
int spa_mode_global;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2013-04-29 22:49:23 +00:00
|
|
|
/*
|
|
|
|
* Expiration time in units of zfs_txg_synctime_ms. This value has two
|
|
|
|
* meanings. First it is used to determine when the spa_deadman logic
|
|
|
|
* should fire. By default the spa_deadman will fire if spa_sync has
|
|
|
|
* not completed in 1000 * zfs_txg_synctime_ms (i.e. 1000 seconds).
|
|
|
|
* Secondly, the value determines if an I/O is considered "hung".
|
|
|
|
* Any I/O that has not completed in zfs_deadman_synctime is considered
|
|
|
|
* "hung" resulting in a zevent being posted.
|
|
|
|
* 1000 zfs_txg_synctime_ms (i.e. 1000 seconds).
|
|
|
|
*/
|
|
|
|
unsigned long zfs_deadman_synctime = 1000ULL;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* By default the deadman is enabled.
|
|
|
|
*/
|
|
|
|
int zfs_deadman_enabled = 1;
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* SPA config locking
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
static void
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_init(spa_t *spa)
|
|
|
|
{
|
2010-08-26 16:52:39 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < SCL_LOCKS; i++) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
|
|
|
mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL);
|
2013-09-04 12:00:57 +00:00
|
|
|
refcount_create_untracked(&scl->scl_count);
|
2008-12-03 20:09:06 +00:00
|
|
|
scl->scl_writer = NULL;
|
|
|
|
scl->scl_write_wanted = 0;
|
|
|
|
}
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_destroy(spa_t *spa)
|
|
|
|
{
|
2010-08-26 16:52:39 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < SCL_LOCKS; i++) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
|
|
|
mutex_destroy(&scl->scl_lock);
|
|
|
|
cv_destroy(&scl->scl_cv);
|
|
|
|
refcount_destroy(&scl->scl_count);
|
|
|
|
ASSERT(scl->scl_writer == NULL);
|
|
|
|
ASSERT(scl->scl_write_wanted == 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-08-26 16:52:39 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < SCL_LOCKS; i++) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
|
|
|
if (!(locks & (1 << i)))
|
|
|
|
continue;
|
|
|
|
mutex_enter(&scl->scl_lock);
|
|
|
|
if (rw == RW_READER) {
|
|
|
|
if (scl->scl_writer || scl->scl_write_wanted) {
|
|
|
|
mutex_exit(&scl->scl_lock);
|
|
|
|
spa_config_exit(spa, locks ^ (1 << i), tag);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
ASSERT(scl->scl_writer != curthread);
|
|
|
|
if (!refcount_is_zero(&scl->scl_count)) {
|
|
|
|
mutex_exit(&scl->scl_lock);
|
|
|
|
spa_config_exit(spa, locks ^ (1 << i), tag);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
scl->scl_writer = curthread;
|
|
|
|
}
|
|
|
|
(void) refcount_add(&scl->scl_count, tag);
|
|
|
|
mutex_exit(&scl->scl_lock);
|
|
|
|
}
|
|
|
|
return (1);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2009-08-18 18:43:27 +00:00
|
|
|
int wlocks_held = 0;
|
2010-08-26 16:52:39 +00:00
|
|
|
int i;
|
2009-08-18 18:43:27 +00:00
|
|
|
|
2013-09-04 12:00:57 +00:00
|
|
|
ASSERT3U(SCL_LOCKS, <, sizeof (wlocks_held) * NBBY);
|
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (i = 0; i < SCL_LOCKS; i++) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
2009-08-18 18:43:27 +00:00
|
|
|
if (scl->scl_writer == curthread)
|
|
|
|
wlocks_held |= (1 << i);
|
2008-12-03 20:09:06 +00:00
|
|
|
if (!(locks & (1 << i)))
|
|
|
|
continue;
|
|
|
|
mutex_enter(&scl->scl_lock);
|
|
|
|
if (rw == RW_READER) {
|
|
|
|
while (scl->scl_writer || scl->scl_write_wanted) {
|
|
|
|
cv_wait(&scl->scl_cv, &scl->scl_lock);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
ASSERT(scl->scl_writer != curthread);
|
|
|
|
while (!refcount_is_zero(&scl->scl_count)) {
|
|
|
|
scl->scl_write_wanted++;
|
|
|
|
cv_wait(&scl->scl_cv, &scl->scl_lock);
|
|
|
|
scl->scl_write_wanted--;
|
|
|
|
}
|
|
|
|
scl->scl_writer = curthread;
|
|
|
|
}
|
|
|
|
(void) refcount_add(&scl->scl_count, tag);
|
|
|
|
mutex_exit(&scl->scl_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
2009-08-18 18:43:27 +00:00
|
|
|
ASSERT(wlocks_held <= locks);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_exit(spa_t *spa, int locks, void *tag)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-08-26 16:52:39 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = SCL_LOCKS - 1; i >= 0; i--) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
|
|
|
if (!(locks & (1 << i)))
|
|
|
|
continue;
|
|
|
|
mutex_enter(&scl->scl_lock);
|
|
|
|
ASSERT(!refcount_is_zero(&scl->scl_count));
|
|
|
|
if (refcount_remove(&scl->scl_count, tag) == 0) {
|
|
|
|
ASSERT(scl->scl_writer == NULL ||
|
|
|
|
scl->scl_writer == curthread);
|
|
|
|
scl->scl_writer = NULL; /* OK in either case */
|
|
|
|
cv_broadcast(&scl->scl_cv);
|
|
|
|
}
|
|
|
|
mutex_exit(&scl->scl_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
int
|
|
|
|
spa_config_held(spa_t *spa, int locks, krw_t rw)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-08-26 16:52:39 +00:00
|
|
|
int i, locks_held = 0;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (i = 0; i < SCL_LOCKS; i++) {
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_t *scl = &spa->spa_config_lock[i];
|
|
|
|
if (!(locks & (1 << i)))
|
|
|
|
continue;
|
|
|
|
if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) ||
|
|
|
|
(rw == RW_WRITER && scl->scl_writer == curthread))
|
|
|
|
locks_held |= 1 << i;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (locks_held);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* SPA namespace functions
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held.
|
|
|
|
* Returns NULL if no matching spa_t is found.
|
|
|
|
*/
|
|
|
|
spa_t *
|
|
|
|
spa_lookup(const char *name)
|
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
static spa_t search; /* spa_t is large; don't allocate on stack */
|
|
|
|
spa_t *spa;
|
2008-11-20 20:01:55 +00:00
|
|
|
avl_index_t where;
|
|
|
|
char *cp;
|
|
|
|
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
|
2013-09-04 12:00:57 +00:00
|
|
|
(void) strlcpy(search.spa_name, name, sizeof (search.spa_name));
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* If it's a full dataset name, figure out the pool name and
|
|
|
|
* just use that.
|
|
|
|
*/
|
2013-09-04 12:00:57 +00:00
|
|
|
cp = strpbrk(search.spa_name, "/@");
|
|
|
|
if (cp != NULL)
|
2008-11-20 20:01:55 +00:00
|
|
|
*cp = '\0';
|
|
|
|
|
|
|
|
spa = avl_find(&spa_namespace_avl, &search, &where);
|
|
|
|
|
|
|
|
return (spa);
|
|
|
|
}
|
|
|
|
|
2013-04-29 22:49:23 +00:00
|
|
|
/*
|
|
|
|
* Fires when spa_sync has not completed within zfs_deadman_synctime_ms.
|
|
|
|
* If the zfs_deadman_enabled flag is set then it inspects all vdev queues
|
|
|
|
* looking for potentially hung I/Os.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
spa_deadman(void *arg)
|
|
|
|
{
|
|
|
|
spa_t *spa = arg;
|
|
|
|
|
|
|
|
zfs_dbgmsg("slow spa_sync: started %llu seconds ago, calls %llu",
|
|
|
|
(gethrtime() - spa->spa_sync_starttime) / NANOSEC,
|
|
|
|
++spa->spa_deadman_calls);
|
|
|
|
if (zfs_deadman_enabled)
|
|
|
|
vdev_deadman(spa->spa_root_vdev);
|
|
|
|
|
|
|
|
spa->spa_deadman_tqid = taskq_dispatch_delay(system_taskq,
|
2013-09-25 16:29:30 +00:00
|
|
|
spa_deadman, spa, TQ_PUSHPAGE, ddi_get_lbolt() +
|
2013-04-29 22:49:23 +00:00
|
|
|
NSEC_TO_TICK(spa->spa_deadman_synctime));
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* Create an uninitialized spa_t with the given name. Requires
|
|
|
|
* spa_namespace_lock. The caller must ensure that the spa_t doesn't already
|
|
|
|
* exist by calling spa_lookup() first.
|
|
|
|
*/
|
|
|
|
spa_t *
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_add(const char *name, nvlist_t *config, const char *altroot)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
spa_t *spa;
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_dirent_t *dp;
|
2010-08-26 16:52:39 +00:00
|
|
|
int t;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
|
2012-05-07 17:49:51 +00:00
|
|
|
spa = kmem_zalloc(sizeof (spa_t), KM_PUSHPAGE | KM_NODEBUG);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL);
|
2010-05-28 20:45:14 +00:00
|
|
|
cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL);
|
2008-12-03 20:09:06 +00:00
|
|
|
cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (t = 0; t < TXG_SIZE; t++)
|
2010-05-28 20:45:14 +00:00
|
|
|
bplist_create(&spa->spa_free_bplist[t]);
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
(void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name));
|
2008-11-20 20:01:55 +00:00
|
|
|
spa->spa_state = POOL_STATE_UNINITIALIZED;
|
|
|
|
spa->spa_freeze_txg = UINT64_MAX;
|
|
|
|
spa->spa_final_txg = UINT64_MAX;
|
2010-05-28 20:45:14 +00:00
|
|
|
spa->spa_load_max_txg = UINT64_MAX;
|
|
|
|
spa->spa_proc = &p0;
|
|
|
|
spa->spa_proc_state = SPA_PROC_NONE;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2013-08-28 23:05:48 +00:00
|
|
|
spa->spa_deadman_synctime = MSEC2NSEC(zfs_deadman_synctime *
|
|
|
|
zfs_txg_synctime_ms);
|
2013-04-29 22:49:23 +00:00
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
refcount_create(&spa->spa_refcount);
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_init(spa);
|
Add visibility in to arc_read
This change is an attempt to add visibility into the arc_read calls
occurring on a system, in real time. To do this, a list was added to the
in memory SPA data structure for a pool, with each element on the list
corresponding to a call to arc_read. These entries are then exported
through the kstat interface, which can then be interpreted in userspace.
For each arc_read call, the following information is exported:
* A unique identifier (uint64_t)
* The time the entry was added to the list (hrtime_t)
(*not* wall clock time; relative to the other entries on the list)
* The objset ID (uint64_t)
* The object number (uint64_t)
* The indirection level (uint64_t)
* The block ID (uint64_t)
* The name of the function originating the arc_read call (char[24])
* The arc_flags from the arc_read call (uint32_t)
* The PID of the reading thread (pid_t)
* The command or name of thread originating read (char[16])
From this exported information one can see, in real time, exactly what
is being read, what function is generating the read, and whether or not
the read was found to be already cached.
There is still some work to be done, but this should serve as a good
starting point.
Specifically, dbuf_read's are not accounted for in the currently
exported information. Thus, a follow up patch should probably be added
to export these calls that never call into arc_read (they only hit the
dbuf hash table). In addition, it might be nice to create a utility
similar to "arcstat.py" to digest the exported information and display
it in a more readable format. Or perhaps, log the information and allow
for it to be "replayed" at a later time.
Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2013-09-06 23:09:05 +00:00
|
|
|
spa_stats_init(spa);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
avl_add(&spa_namespace_avl, spa);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set the alternate root, if there is one.
|
|
|
|
*/
|
|
|
|
if (altroot) {
|
|
|
|
spa->spa_root = spa_strdup(altroot);
|
|
|
|
spa_active_count++;
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
/*
|
|
|
|
* Every pool starts with the default cachefile
|
|
|
|
*/
|
|
|
|
list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t),
|
|
|
|
offsetof(spa_config_dirent_t, scd_link));
|
|
|
|
|
2012-05-07 17:49:51 +00:00
|
|
|
dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_PUSHPAGE);
|
2010-05-28 20:45:14 +00:00
|
|
|
dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path);
|
2008-12-03 20:09:06 +00:00
|
|
|
list_insert_head(&spa->spa_config_list, dp);
|
|
|
|
|
2010-08-26 21:24:34 +00:00
|
|
|
VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME,
|
2012-05-07 17:49:51 +00:00
|
|
|
KM_PUSHPAGE) == 0);
|
2010-08-26 21:24:34 +00:00
|
|
|
|
2012-12-13 23:24:15 +00:00
|
|
|
if (config != NULL) {
|
|
|
|
nvlist_t *features;
|
|
|
|
|
|
|
|
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ,
|
|
|
|
&features) == 0) {
|
|
|
|
VERIFY(nvlist_dup(features, &spa->spa_label_features,
|
|
|
|
0) == 0);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0);
|
2012-12-13 23:24:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (spa->spa_label_features == NULL) {
|
|
|
|
VERIFY(nvlist_alloc(&spa->spa_label_features, NV_UNIQUE_NAME,
|
|
|
|
KM_SLEEP) == 0);
|
|
|
|
}
|
2010-05-28 20:45:14 +00:00
|
|
|
|
2013-09-04 12:00:57 +00:00
|
|
|
spa->spa_debug = ((zfs_flags & ZFS_DEBUG_SPA) != 0);
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
return (spa);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Removes a spa_t from the namespace, freeing up any memory used. Requires
|
|
|
|
* spa_namespace_lock. This is called only after the spa_t has been closed and
|
|
|
|
* deactivated.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
spa_remove(spa_t *spa)
|
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_dirent_t *dp;
|
2010-08-26 16:52:39 +00:00
|
|
|
int t;
|
2008-12-03 20:09:06 +00:00
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
nvlist_free(spa->spa_config_splitting);
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
avl_remove(&spa_namespace_avl, spa);
|
|
|
|
cv_broadcast(&spa_namespace_cv);
|
|
|
|
|
|
|
|
if (spa->spa_root) {
|
|
|
|
spa_strfree(spa->spa_root);
|
|
|
|
spa_active_count--;
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
while ((dp = list_head(&spa->spa_config_list)) != NULL) {
|
|
|
|
list_remove(&spa->spa_config_list, dp);
|
|
|
|
if (dp->scd_path != NULL)
|
|
|
|
spa_strfree(dp->scd_path);
|
|
|
|
kmem_free(dp, sizeof (spa_config_dirent_t));
|
|
|
|
}
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
list_destroy(&spa->spa_config_list);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2012-12-13 23:24:15 +00:00
|
|
|
nvlist_free(spa->spa_label_features);
|
2010-08-26 21:24:34 +00:00
|
|
|
nvlist_free(spa->spa_load_info);
|
2008-11-20 20:01:55 +00:00
|
|
|
spa_config_set(spa, NULL);
|
|
|
|
|
|
|
|
refcount_destroy(&spa->spa_refcount);
|
|
|
|
|
Add visibility in to arc_read
This change is an attempt to add visibility into the arc_read calls
occurring on a system, in real time. To do this, a list was added to the
in memory SPA data structure for a pool, with each element on the list
corresponding to a call to arc_read. These entries are then exported
through the kstat interface, which can then be interpreted in userspace.
For each arc_read call, the following information is exported:
* A unique identifier (uint64_t)
* The time the entry was added to the list (hrtime_t)
(*not* wall clock time; relative to the other entries on the list)
* The objset ID (uint64_t)
* The object number (uint64_t)
* The indirection level (uint64_t)
* The block ID (uint64_t)
* The name of the function originating the arc_read call (char[24])
* The arc_flags from the arc_read call (uint32_t)
* The PID of the reading thread (pid_t)
* The command or name of thread originating read (char[16])
From this exported information one can see, in real time, exactly what
is being read, what function is generating the read, and whether or not
the read was found to be already cached.
There is still some work to be done, but this should serve as a good
starting point.
Specifically, dbuf_read's are not accounted for in the currently
exported information. Thus, a follow up patch should probably be added
to export these calls that never call into arc_read (they only hit the
dbuf hash table). In addition, it might be nice to create a utility
similar to "arcstat.py" to digest the exported information and display
it in a more readable format. Or perhaps, log the information and allow
for it to be "replayed" at a later time.
Signed-off-by: Prakash Surya <surya1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2013-09-06 23:09:05 +00:00
|
|
|
spa_stats_destroy(spa);
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_lock_destroy(spa);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (t = 0; t < TXG_SIZE; t++)
|
2010-05-28 20:45:14 +00:00
|
|
|
bplist_destroy(&spa->spa_free_bplist[t]);
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
cv_destroy(&spa->spa_async_cv);
|
2010-05-28 20:45:14 +00:00
|
|
|
cv_destroy(&spa->spa_proc_cv);
|
2008-11-20 20:01:55 +00:00
|
|
|
cv_destroy(&spa->spa_scrub_io_cv);
|
2008-12-03 20:09:06 +00:00
|
|
|
cv_destroy(&spa->spa_suspend_cv);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
mutex_destroy(&spa->spa_async_lock);
|
|
|
|
mutex_destroy(&spa->spa_errlist_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_destroy(&spa->spa_errlog_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_destroy(&spa->spa_history_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_destroy(&spa->spa_proc_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_destroy(&spa->spa_props_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_destroy(&spa->spa_scrub_lock);
|
2008-12-03 20:09:06 +00:00
|
|
|
mutex_destroy(&spa->spa_suspend_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_destroy(&spa->spa_vdev_top_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
kmem_free(spa, sizeof (spa_t));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Given a pool, return the next pool in the namespace, or NULL if there is
|
|
|
|
* none. If 'prev' is NULL, return the first pool.
|
|
|
|
*/
|
|
|
|
spa_t *
|
|
|
|
spa_next(spa_t *prev)
|
|
|
|
{
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
|
|
|
|
if (prev)
|
|
|
|
return (AVL_NEXT(&spa_namespace_avl, prev));
|
|
|
|
else
|
|
|
|
return (avl_first(&spa_namespace_avl));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* SPA refcount functions
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a reference to the given spa_t. Must have at least one reference, or
|
|
|
|
* have the namespace lock held.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
spa_open_ref(spa_t *spa, void *tag)
|
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref ||
|
2008-11-20 20:01:55 +00:00
|
|
|
MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
(void) refcount_add(&spa->spa_refcount, tag);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Remove a reference to the given spa_t. Must have at least one reference, or
|
|
|
|
* have the namespace lock held.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
spa_close(spa_t *spa, void *tag)
|
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref ||
|
2008-11-20 20:01:55 +00:00
|
|
|
MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
(void) refcount_remove(&spa->spa_refcount, tag);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check to see if the spa refcount is zero. Must be called with
|
2008-12-03 20:09:06 +00:00
|
|
|
* spa_namespace_lock held. We really compare against spa_minref, which is the
|
2008-11-20 20:01:55 +00:00
|
|
|
* number of references acquired when opening a pool
|
|
|
|
*/
|
|
|
|
boolean_t
|
|
|
|
spa_refcount_zero(spa_t *spa)
|
|
|
|
{
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
return (refcount_count(&spa->spa_refcount) == spa->spa_minref);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* SPA spare and l2cache tracking
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Hot spares and cache devices are tracked using the same code below,
|
|
|
|
* for 'auxiliary' devices.
|
|
|
|
*/
|
|
|
|
|
|
|
|
typedef struct spa_aux {
|
|
|
|
uint64_t aux_guid;
|
|
|
|
uint64_t aux_pool;
|
|
|
|
avl_node_t aux_avl;
|
|
|
|
int aux_count;
|
|
|
|
} spa_aux_t;
|
|
|
|
|
|
|
|
static int
|
|
|
|
spa_aux_compare(const void *a, const void *b)
|
|
|
|
{
|
|
|
|
const spa_aux_t *sa = a;
|
|
|
|
const spa_aux_t *sb = b;
|
|
|
|
|
|
|
|
if (sa->aux_guid < sb->aux_guid)
|
|
|
|
return (-1);
|
|
|
|
else if (sa->aux_guid > sb->aux_guid)
|
|
|
|
return (1);
|
|
|
|
else
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_aux_add(vdev_t *vd, avl_tree_t *avl)
|
|
|
|
{
|
|
|
|
avl_index_t where;
|
|
|
|
spa_aux_t search;
|
|
|
|
spa_aux_t *aux;
|
|
|
|
|
|
|
|
search.aux_guid = vd->vdev_guid;
|
|
|
|
if ((aux = avl_find(avl, &search, &where)) != NULL) {
|
|
|
|
aux->aux_count++;
|
|
|
|
} else {
|
2012-05-07 17:49:51 +00:00
|
|
|
aux = kmem_zalloc(sizeof (spa_aux_t), KM_PUSHPAGE);
|
2008-11-20 20:01:55 +00:00
|
|
|
aux->aux_guid = vd->vdev_guid;
|
|
|
|
aux->aux_count = 1;
|
|
|
|
avl_insert(avl, aux, where);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_aux_remove(vdev_t *vd, avl_tree_t *avl)
|
|
|
|
{
|
|
|
|
spa_aux_t search;
|
|
|
|
spa_aux_t *aux;
|
|
|
|
avl_index_t where;
|
|
|
|
|
|
|
|
search.aux_guid = vd->vdev_guid;
|
|
|
|
aux = avl_find(avl, &search, &where);
|
|
|
|
|
|
|
|
ASSERT(aux != NULL);
|
|
|
|
|
|
|
|
if (--aux->aux_count == 0) {
|
|
|
|
avl_remove(avl, aux);
|
|
|
|
kmem_free(aux, sizeof (spa_aux_t));
|
|
|
|
} else if (aux->aux_pool == spa_guid(vd->vdev_spa)) {
|
|
|
|
aux->aux_pool = 0ULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
boolean_t
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
spa_aux_t search, *found;
|
|
|
|
|
|
|
|
search.aux_guid = guid;
|
2008-12-03 20:09:06 +00:00
|
|
|
found = avl_find(avl, &search, NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
if (pool) {
|
|
|
|
if (found)
|
|
|
|
*pool = found->aux_pool;
|
|
|
|
else
|
|
|
|
*pool = 0ULL;
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
if (refcnt) {
|
|
|
|
if (found)
|
|
|
|
*refcnt = found->aux_count;
|
|
|
|
else
|
|
|
|
*refcnt = 0;
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
return (found != NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_aux_activate(vdev_t *vd, avl_tree_t *avl)
|
|
|
|
{
|
|
|
|
spa_aux_t search, *found;
|
|
|
|
avl_index_t where;
|
|
|
|
|
|
|
|
search.aux_guid = vd->vdev_guid;
|
|
|
|
found = avl_find(avl, &search, &where);
|
|
|
|
ASSERT(found != NULL);
|
|
|
|
ASSERT(found->aux_pool == 0ULL);
|
|
|
|
|
|
|
|
found->aux_pool = spa_guid(vd->vdev_spa);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Spares are tracked globally due to the following constraints:
|
|
|
|
*
|
|
|
|
* - A spare may be part of multiple pools.
|
|
|
|
* - A spare may be added to a pool even if it's actively in use within
|
|
|
|
* another pool.
|
|
|
|
* - A spare in use in any pool can only be the source of a replacement if
|
|
|
|
* the target is a spare in the same pool.
|
|
|
|
*
|
|
|
|
* We keep track of all spares on the system through the use of a reference
|
|
|
|
* counted AVL tree. When a vdev is added as a spare, or used as a replacement
|
|
|
|
* spare, then we bump the reference count in the AVL tree. In addition, we set
|
|
|
|
* the 'vdev_isspare' member to indicate that the device is a spare (active or
|
|
|
|
* inactive). When a spare is made active (used to replace a device in the
|
|
|
|
* pool), we also keep track of which pool its been made a part of.
|
|
|
|
*
|
|
|
|
* The 'spa_spare_lock' protects the AVL tree. These functions are normally
|
|
|
|
* called under the spa_namespace lock as part of vdev reconfiguration. The
|
|
|
|
* separate spare lock exists for the status query path, which does not need to
|
|
|
|
* be completely consistent with respect to other vdev configuration changes.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
spa_spare_compare(const void *a, const void *b)
|
|
|
|
{
|
|
|
|
return (spa_aux_compare(a, b));
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_spare_add(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_spare_lock);
|
|
|
|
ASSERT(!vd->vdev_isspare);
|
|
|
|
spa_aux_add(vd, &spa_spare_avl);
|
|
|
|
vd->vdev_isspare = B_TRUE;
|
|
|
|
mutex_exit(&spa_spare_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_spare_remove(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_spare_lock);
|
|
|
|
ASSERT(vd->vdev_isspare);
|
|
|
|
spa_aux_remove(vd, &spa_spare_avl);
|
|
|
|
vd->vdev_isspare = B_FALSE;
|
|
|
|
mutex_exit(&spa_spare_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
boolean_t
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
boolean_t found;
|
|
|
|
|
|
|
|
mutex_enter(&spa_spare_lock);
|
2008-12-03 20:09:06 +00:00
|
|
|
found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_exit(&spa_spare_lock);
|
|
|
|
|
|
|
|
return (found);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_spare_activate(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_spare_lock);
|
|
|
|
ASSERT(vd->vdev_isspare);
|
|
|
|
spa_aux_activate(vd, &spa_spare_avl);
|
|
|
|
mutex_exit(&spa_spare_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Level 2 ARC devices are tracked globally for the same reasons as spares.
|
|
|
|
* Cache devices currently only support one pool per cache device, and so
|
|
|
|
* for these devices the aux reference count is currently unused beyond 1.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
spa_l2cache_compare(const void *a, const void *b)
|
|
|
|
{
|
|
|
|
return (spa_aux_compare(a, b));
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_l2cache_add(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_l2cache_lock);
|
|
|
|
ASSERT(!vd->vdev_isl2cache);
|
|
|
|
spa_aux_add(vd, &spa_l2cache_avl);
|
|
|
|
vd->vdev_isl2cache = B_TRUE;
|
|
|
|
mutex_exit(&spa_l2cache_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_l2cache_remove(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_l2cache_lock);
|
|
|
|
ASSERT(vd->vdev_isl2cache);
|
|
|
|
spa_aux_remove(vd, &spa_l2cache_avl);
|
|
|
|
vd->vdev_isl2cache = B_FALSE;
|
|
|
|
mutex_exit(&spa_l2cache_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
boolean_t
|
|
|
|
spa_l2cache_exists(uint64_t guid, uint64_t *pool)
|
|
|
|
{
|
|
|
|
boolean_t found;
|
|
|
|
|
|
|
|
mutex_enter(&spa_l2cache_lock);
|
2008-12-03 20:09:06 +00:00
|
|
|
found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_exit(&spa_l2cache_lock);
|
|
|
|
|
|
|
|
return (found);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_l2cache_activate(vdev_t *vd)
|
|
|
|
{
|
|
|
|
mutex_enter(&spa_l2cache_lock);
|
|
|
|
ASSERT(vd->vdev_isl2cache);
|
|
|
|
spa_aux_activate(vd, &spa_l2cache_avl);
|
|
|
|
mutex_exit(&spa_l2cache_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* SPA vdev locking
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Lock the given spa_t for the purpose of adding or removing a vdev.
|
|
|
|
* Grabs the global spa_namespace_lock plus the spa config lock for writing.
|
|
|
|
* It returns the next transaction group for the spa_t.
|
|
|
|
*/
|
|
|
|
uint64_t
|
|
|
|
spa_vdev_enter(spa_t *spa)
|
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_enter(&spa->spa_vdev_top_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_enter(&spa_namespace_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
return (spa_vdev_config_enter(spa));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Internal implementation for spa_vdev_enter(). Used when a vdev
|
|
|
|
* operation requires multiple syncs (i.e. removing a device) while
|
|
|
|
* keeping the spa_namespace_lock held.
|
|
|
|
*/
|
|
|
|
uint64_t
|
|
|
|
spa_vdev_config_enter(spa_t *spa)
|
|
|
|
{
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_enter(spa, SCL_ALL, spa, RW_WRITER);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
return (spa_last_synced_txg(spa) + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2010-05-28 20:45:14 +00:00
|
|
|
* Used in combination with spa_vdev_config_enter() to allow the syncing
|
|
|
|
* of multiple transactions without releasing the spa_namespace_lock.
|
2008-11-20 20:01:55 +00:00
|
|
|
*/
|
2010-05-28 20:45:14 +00:00
|
|
|
void
|
|
|
|
spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
int config_changed = B_FALSE;
|
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
2008-11-20 20:01:55 +00:00
|
|
|
ASSERT(txg > spa_last_synced_txg(spa));
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa->spa_pending_vdev = NULL;
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* Reassess the DTLs.
|
|
|
|
*/
|
|
|
|
vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE);
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) {
|
2008-11-20 20:01:55 +00:00
|
|
|
config_changed = B_TRUE;
|
2010-05-28 20:45:14 +00:00
|
|
|
spa->spa_config_generation++;
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* Verify the metaslab classes.
|
|
|
|
*/
|
|
|
|
ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0);
|
|
|
|
ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0);
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_exit(spa, SCL_ALL, spa);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* Panic the system if the specified tag requires it. This
|
|
|
|
* is useful for ensuring that configurations are updated
|
|
|
|
* transactionally.
|
|
|
|
*/
|
|
|
|
if (zio_injection_enabled)
|
|
|
|
zio_handle_panic_injection(spa, tag, 0);
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* Note: this txg_wait_synced() is important because it ensures
|
|
|
|
* that there won't be more than one config change per txg.
|
|
|
|
* This allows us to use the txg as the generation number.
|
|
|
|
*/
|
|
|
|
if (error == 0)
|
|
|
|
txg_wait_synced(spa->spa_dsl_pool, txg);
|
|
|
|
|
|
|
|
if (vd != NULL) {
|
2009-01-15 21:59:39 +00:00
|
|
|
ASSERT(!vd->vdev_detached || vd->vdev_dtl_smo.smo_object == 0);
|
|
|
|
spa_config_enter(spa, SCL_ALL, spa, RW_WRITER);
|
2008-11-20 20:01:55 +00:00
|
|
|
vdev_free(vd);
|
2009-01-15 21:59:39 +00:00
|
|
|
spa_config_exit(spa, SCL_ALL, spa);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the config changed, update the config cache.
|
|
|
|
*/
|
|
|
|
if (config_changed)
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_sync(spa, B_FALSE, B_TRUE);
|
2010-05-28 20:45:14 +00:00
|
|
|
}
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* Unlock the spa_t after adding or removing a vdev. Besides undoing the
|
|
|
|
* locking of spa_vdev_enter(), we also want make sure the transactions have
|
|
|
|
* synced to disk, and then update the global configuration cache with the new
|
|
|
|
* information.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error)
|
|
|
|
{
|
|
|
|
spa_vdev_config_exit(spa, vd, txg, error, FTAG);
|
2008-11-20 20:01:55 +00:00
|
|
|
mutex_exit(&spa_namespace_lock);
|
2010-05-28 20:45:14 +00:00
|
|
|
mutex_exit(&spa->spa_vdev_top_lock);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
/*
|
|
|
|
* Lock the given spa_t for the purpose of changing vdev state.
|
|
|
|
*/
|
|
|
|
void
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_vdev_state_enter(spa_t *spa, int oplocks)
|
2008-12-03 20:09:06 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
int locks = SCL_STATE_ALL | oplocks;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Root pools may need to read of the underlying devfs filesystem
|
|
|
|
* when opening up a vdev. Unfortunately if we're holding the
|
|
|
|
* SCL_ZIO lock it will result in a deadlock when we try to issue
|
|
|
|
* the read from the root filesystem. Instead we "prefetch"
|
|
|
|
* the associated vnodes that we need prior to opening the
|
|
|
|
* underlying devices and cache them so that we can prevent
|
|
|
|
* any I/O when we are doing the actual open.
|
|
|
|
*/
|
|
|
|
if (spa_is_root(spa)) {
|
|
|
|
int low = locks & ~(SCL_ZIO - 1);
|
|
|
|
int high = locks & ~low;
|
|
|
|
|
|
|
|
spa_config_enter(spa, high, spa, RW_WRITER);
|
|
|
|
vdev_hold(spa->spa_root_vdev);
|
|
|
|
spa_config_enter(spa, low, spa, RW_WRITER);
|
|
|
|
} else {
|
|
|
|
spa_config_enter(spa, locks, spa, RW_WRITER);
|
|
|
|
}
|
|
|
|
spa->spa_vdev_locks = locks;
|
2008-12-03 20:09:06 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error)
|
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
boolean_t config_changed = B_FALSE;
|
|
|
|
|
|
|
|
if (vd != NULL || error == 0)
|
|
|
|
vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev,
|
|
|
|
0, 0, B_FALSE);
|
|
|
|
|
|
|
|
if (vd != NULL) {
|
2008-12-03 20:09:06 +00:00
|
|
|
vdev_state_dirty(vd->vdev_top);
|
2010-05-28 20:45:14 +00:00
|
|
|
config_changed = B_TRUE;
|
|
|
|
spa->spa_config_generation++;
|
|
|
|
}
|
2008-12-03 20:09:06 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
if (spa_is_root(spa))
|
|
|
|
vdev_rele(spa->spa_root_vdev);
|
|
|
|
|
|
|
|
ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL);
|
|
|
|
spa_config_exit(spa, spa->spa_vdev_locks, spa);
|
2008-12-03 20:09:06 +00:00
|
|
|
|
2009-01-15 21:59:39 +00:00
|
|
|
/*
|
|
|
|
* If anything changed, wait for it to sync. This ensures that,
|
|
|
|
* from the system administrator's perspective, zpool(1M) commands
|
|
|
|
* are synchronous. This is important for things like zpool offline:
|
|
|
|
* when the command completes, you expect no further I/O from ZFS.
|
|
|
|
*/
|
|
|
|
if (vd != NULL)
|
|
|
|
txg_wait_synced(spa->spa_dsl_pool, 0);
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* If the config changed, update the config cache.
|
|
|
|
*/
|
|
|
|
if (config_changed) {
|
|
|
|
mutex_enter(&spa_namespace_lock);
|
|
|
|
spa_config_sync(spa, B_FALSE, B_TRUE);
|
|
|
|
mutex_exit(&spa_namespace_lock);
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* Miscellaneous functions
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
2012-12-13 23:24:15 +00:00
|
|
|
void
|
|
|
|
spa_activate_mos_feature(spa_t *spa, const char *feature)
|
|
|
|
{
|
|
|
|
(void) nvlist_add_boolean(spa->spa_label_features, feature);
|
|
|
|
vdev_config_dirty(spa->spa_root_vdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_deactivate_mos_feature(spa_t *spa, const char *feature)
|
|
|
|
{
|
|
|
|
(void) nvlist_remove_all(spa->spa_label_features, feature);
|
|
|
|
vdev_config_dirty(spa->spa_root_vdev);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* Rename a spa_t.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
spa_rename(const char *name, const char *newname)
|
|
|
|
{
|
|
|
|
spa_t *spa;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Lookup the spa_t and grab the config lock for writing. We need to
|
|
|
|
* actually open the pool so that we can sync out the necessary labels.
|
|
|
|
* It's OK to call spa_open() with the namespace lock held because we
|
|
|
|
* allow recursive calls for other reasons.
|
|
|
|
*/
|
|
|
|
mutex_enter(&spa_namespace_lock);
|
|
|
|
if ((err = spa_open(name, &spa, FTAG)) != 0) {
|
|
|
|
mutex_exit(&spa_namespace_lock);
|
|
|
|
return (err);
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
avl_remove(&spa_namespace_avl, spa);
|
2008-12-03 20:09:06 +00:00
|
|
|
(void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name));
|
2008-11-20 20:01:55 +00:00
|
|
|
avl_add(&spa_namespace_avl, spa);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sync all labels to disk with the new names by marking the root vdev
|
|
|
|
* dirty and waiting for it to sync. It will pick up the new pool name
|
|
|
|
* during the sync.
|
|
|
|
*/
|
|
|
|
vdev_config_dirty(spa->spa_root_vdev);
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_exit(spa, SCL_ALL, FTAG);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
txg_wait_synced(spa->spa_dsl_pool, 0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sync the updated config cache.
|
|
|
|
*/
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_sync(spa, B_FALSE, B_TRUE);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
spa_close(spa, FTAG);
|
|
|
|
|
|
|
|
mutex_exit(&spa_namespace_lock);
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2010-08-26 21:24:34 +00:00
|
|
|
* Return the spa_t associated with given pool_guid, if it exists. If
|
|
|
|
* device_guid is non-zero, determine whether the pool exists *and* contains
|
|
|
|
* a device with the specified device_guid.
|
2008-11-20 20:01:55 +00:00
|
|
|
*/
|
2010-08-26 21:24:34 +00:00
|
|
|
spa_t *
|
|
|
|
spa_by_guid(uint64_t pool_guid, uint64_t device_guid)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
spa_t *spa;
|
|
|
|
avl_tree_t *t = &spa_namespace_avl;
|
|
|
|
|
|
|
|
ASSERT(MUTEX_HELD(&spa_namespace_lock));
|
|
|
|
|
|
|
|
for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) {
|
|
|
|
if (spa->spa_state == POOL_STATE_UNINITIALIZED)
|
|
|
|
continue;
|
|
|
|
if (spa->spa_root_vdev == NULL)
|
|
|
|
continue;
|
|
|
|
if (spa_guid(spa) == pool_guid) {
|
|
|
|
if (device_guid == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (vdev_lookup_by_guid(spa->spa_root_vdev,
|
|
|
|
device_guid) != NULL)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check any devices we may be in the process of adding.
|
|
|
|
*/
|
|
|
|
if (spa->spa_pending_vdev) {
|
|
|
|
if (vdev_lookup_by_guid(spa->spa_pending_vdev,
|
|
|
|
device_guid) != NULL)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-08-26 21:24:34 +00:00
|
|
|
return (spa);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Determine whether a pool with the given pool_guid exists.
|
|
|
|
*/
|
|
|
|
boolean_t
|
|
|
|
spa_guid_exists(uint64_t pool_guid, uint64_t device_guid)
|
|
|
|
{
|
|
|
|
return (spa_by_guid(pool_guid, device_guid) != NULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
spa_strdup(const char *s)
|
|
|
|
{
|
|
|
|
size_t len;
|
|
|
|
char *new;
|
|
|
|
|
|
|
|
len = strlen(s);
|
2012-05-07 17:49:51 +00:00
|
|
|
new = kmem_alloc(len + 1, KM_PUSHPAGE);
|
2008-11-20 20:01:55 +00:00
|
|
|
bcopy(s, new, len);
|
|
|
|
new[len] = '\0';
|
|
|
|
|
|
|
|
return (new);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_strfree(char *s)
|
|
|
|
{
|
|
|
|
kmem_free(s, strlen(s) + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_get_random(uint64_t range)
|
|
|
|
{
|
|
|
|
uint64_t r;
|
|
|
|
|
|
|
|
ASSERT(range != 0);
|
|
|
|
|
|
|
|
(void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t));
|
|
|
|
|
|
|
|
return (r % range);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
uint64_t
|
|
|
|
spa_generate_guid(spa_t *spa)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
uint64_t guid = spa_get_random(-1ULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
if (spa != NULL) {
|
|
|
|
while (guid == 0 || spa_guid_exists(spa_guid(spa), guid))
|
|
|
|
guid = spa_get_random(-1ULL);
|
|
|
|
} else {
|
|
|
|
while (guid == 0 || spa_guid_exists(guid, 0))
|
|
|
|
guid = spa_get_random(-1ULL);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
return (guid);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
sprintf_blkptr(char *buf, const blkptr_t *bp)
|
|
|
|
{
|
2012-12-13 23:24:15 +00:00
|
|
|
char type[256];
|
2010-05-28 20:45:14 +00:00
|
|
|
char *checksum = NULL;
|
|
|
|
char *compress = NULL;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
if (bp != NULL) {
|
2012-12-13 23:24:15 +00:00
|
|
|
if (BP_GET_TYPE(bp) & DMU_OT_NEWTYPE) {
|
|
|
|
dmu_object_byteswap_t bswap =
|
|
|
|
DMU_OT_BYTESWAP(BP_GET_TYPE(bp));
|
|
|
|
(void) snprintf(type, sizeof (type), "bswap %s %s",
|
|
|
|
DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) ?
|
|
|
|
"metadata" : "data",
|
|
|
|
dmu_ot_byteswap[bswap].ob_name);
|
|
|
|
} else {
|
|
|
|
(void) strlcpy(type, dmu_ot[BP_GET_TYPE(bp)].ot_name,
|
|
|
|
sizeof (type));
|
|
|
|
}
|
2010-05-28 20:45:14 +00:00
|
|
|
checksum = zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name;
|
|
|
|
compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name;
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
SPRINTF_BLKPTR(snprintf, ' ', buf, bp, type, checksum, compress);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_freeze(spa_t *spa)
|
|
|
|
{
|
|
|
|
uint64_t freeze_txg = 0;
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
|
2008-11-20 20:01:55 +00:00
|
|
|
if (spa->spa_freeze_txg == UINT64_MAX) {
|
|
|
|
freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE;
|
|
|
|
spa->spa_freeze_txg = freeze_txg;
|
|
|
|
}
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_exit(spa, SCL_ALL, FTAG);
|
2008-11-20 20:01:55 +00:00
|
|
|
if (freeze_txg != 0)
|
|
|
|
txg_wait_synced(spa_get_dsl(spa), freeze_txg);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* This is a stripped-down version of strtoull, suitable only for converting
|
|
|
|
* lowercase hexidecimal numbers that don't overflow.
|
|
|
|
*/
|
|
|
|
uint64_t
|
|
|
|
strtonum(const char *str, char **nptr)
|
|
|
|
{
|
|
|
|
uint64_t val = 0;
|
|
|
|
char c;
|
|
|
|
int digit;
|
|
|
|
|
|
|
|
while ((c = *str) != '\0') {
|
|
|
|
if (c >= '0' && c <= '9')
|
|
|
|
digit = c - '0';
|
|
|
|
else if (c >= 'a' && c <= 'f')
|
|
|
|
digit = 10 + c - 'a';
|
|
|
|
else
|
|
|
|
break;
|
|
|
|
|
|
|
|
val *= 16;
|
|
|
|
val += digit;
|
|
|
|
|
|
|
|
str++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (nptr)
|
|
|
|
*nptr = (char *)str;
|
|
|
|
|
|
|
|
return (val);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* Accessor functions
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
boolean_t
|
|
|
|
spa_shutting_down(spa_t *spa)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
return (spa->spa_async_suspended);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
dsl_pool_t *
|
|
|
|
spa_get_dsl(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_dsl_pool);
|
|
|
|
}
|
|
|
|
|
2012-12-13 23:24:15 +00:00
|
|
|
boolean_t
|
|
|
|
spa_is_initializing(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_is_initializing);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
blkptr_t *
|
|
|
|
spa_get_rootblkptr(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (&spa->spa_ubsync.ub_rootbp);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp)
|
|
|
|
{
|
|
|
|
spa->spa_uberblock.ub_rootbp = *bp;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_altroot(spa_t *spa, char *buf, size_t buflen)
|
|
|
|
{
|
|
|
|
if (spa->spa_root == NULL)
|
|
|
|
buf[0] = '\0';
|
|
|
|
else
|
|
|
|
(void) strncpy(buf, spa->spa_root, buflen);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
spa_sync_pass(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_sync_pass);
|
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
spa_name(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_guid(spa_t *spa)
|
|
|
|
{
|
2012-12-14 20:38:04 +00:00
|
|
|
dsl_pool_t *dp = spa_get_dsl(spa);
|
|
|
|
uint64_t guid;
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
/*
|
|
|
|
* If we fail to parse the config during spa_load(), we can go through
|
|
|
|
* the error path (which posts an ereport) and end up here with no root
|
2011-11-11 22:07:54 +00:00
|
|
|
* vdev. We stash the original pool guid in 'spa_config_guid' to handle
|
2008-11-20 20:01:55 +00:00
|
|
|
* this case.
|
|
|
|
*/
|
2012-12-14 20:38:04 +00:00
|
|
|
if (spa->spa_root_vdev == NULL)
|
|
|
|
return (spa->spa_config_guid);
|
|
|
|
|
|
|
|
guid = spa->spa_last_synced_guid != 0 ?
|
|
|
|
spa->spa_last_synced_guid : spa->spa_root_vdev->vdev_guid;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the most recently synced out guid unless we're
|
|
|
|
* in syncing context.
|
|
|
|
*/
|
|
|
|
if (dp && dsl_pool_sync_context(dp))
|
2008-11-20 20:01:55 +00:00
|
|
|
return (spa->spa_root_vdev->vdev_guid);
|
|
|
|
else
|
2012-12-14 20:38:04 +00:00
|
|
|
return (guid);
|
2011-11-11 22:07:54 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_load_guid(spa_t *spa)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* This is a GUID that exists solely as a reference for the
|
|
|
|
* purposes of the arc. It is generated at load time, and
|
|
|
|
* is never written to persistent storage.
|
|
|
|
*/
|
|
|
|
return (spa->spa_load_guid);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_last_synced_txg(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_ubsync.ub_txg);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_first_txg(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_first_txg);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
uint64_t
|
|
|
|
spa_syncing_txg(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_syncing_txg);
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
pool_state_t
|
2008-11-20 20:01:55 +00:00
|
|
|
spa_state(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_state);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_load_state_t
|
|
|
|
spa_load_state(spa_t *spa)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
return (spa->spa_load_state);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_freeze_txg(spa_t *spa)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
return (spa->spa_freeze_txg);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
/* ARGSUSED */
|
2008-11-20 20:01:55 +00:00
|
|
|
uint64_t
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_get_asize(spa_t *spa, uint64_t lsize)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
/*
|
|
|
|
* The worst case is single-sector max-parity RAID-Z blocks, in which
|
|
|
|
* case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1)
|
|
|
|
* times the size; so just assume that. Add to this the fact that
|
|
|
|
* we can have up to 3 DVAs per bp, and one more factor of 2 because
|
|
|
|
* the block may be dittoed with up to 3 DVAs by ddt_sync().
|
|
|
|
*/
|
|
|
|
return (lsize * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_get_dspace(spa_t *spa)
|
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
return (spa->spa_dspace);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
void
|
|
|
|
spa_update_dspace(spa_t *spa)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) +
|
|
|
|
ddt_get_dedup_dspace(spa);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the failure mode that has been set to this pool. The default
|
|
|
|
* behavior will be to block all I/Os when a complete failure occurs.
|
|
|
|
*/
|
|
|
|
uint8_t
|
|
|
|
spa_get_failmode(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_failmode);
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
boolean_t
|
|
|
|
spa_suspended(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_suspended);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
uint64_t
|
|
|
|
spa_version(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_ubsync.ub_version);
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
boolean_t
|
|
|
|
spa_deflate(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_deflate);
|
|
|
|
}
|
|
|
|
|
|
|
|
metaslab_class_t *
|
|
|
|
spa_normal_class(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_normal_class);
|
|
|
|
}
|
|
|
|
|
|
|
|
metaslab_class_t *
|
|
|
|
spa_log_class(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_log_class);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
int
|
|
|
|
spa_max_replication(spa_t *spa)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to
|
|
|
|
* handle BPs with more than one DVA allocated. Set our max
|
|
|
|
* replication level accordingly.
|
|
|
|
*/
|
|
|
|
if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS)
|
|
|
|
return (1);
|
|
|
|
return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override));
|
|
|
|
}
|
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
int
|
|
|
|
spa_prev_software_version(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_prev_software_version);
|
|
|
|
}
|
|
|
|
|
2013-04-29 22:49:23 +00:00
|
|
|
uint64_t
|
|
|
|
spa_deadman_synctime(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_deadman_synctime);
|
|
|
|
}
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
uint64_t
|
2010-05-28 20:45:14 +00:00
|
|
|
dva_get_dsize_sync(spa_t *spa, const dva_t *dva)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
2010-05-28 20:45:14 +00:00
|
|
|
uint64_t asize = DVA_GET_ASIZE(dva);
|
|
|
|
uint64_t dsize = asize;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
if (asize != 0 && spa->spa_deflate) {
|
|
|
|
vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva));
|
|
|
|
dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio;
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
2010-05-28 20:45:14 +00:00
|
|
|
|
|
|
|
return (dsize);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp)
|
|
|
|
{
|
|
|
|
uint64_t dsize = 0;
|
2010-08-26 16:52:39 +00:00
|
|
|
int d;
|
2010-05-28 20:45:14 +00:00
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (d = 0; d < SPA_DVAS_PER_BP; d++)
|
2010-05-28 20:45:14 +00:00
|
|
|
dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]);
|
|
|
|
|
|
|
|
return (dsize);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
bp_get_dsize(spa_t *spa, const blkptr_t *bp)
|
|
|
|
{
|
|
|
|
uint64_t dsize = 0;
|
2010-08-26 16:52:39 +00:00
|
|
|
int d;
|
2010-05-28 20:45:14 +00:00
|
|
|
|
|
|
|
spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
|
|
|
|
|
2010-08-26 16:52:39 +00:00
|
|
|
for (d = 0; d < SPA_DVAS_PER_BP; d++)
|
2010-05-28 20:45:14 +00:00
|
|
|
dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]);
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
spa_config_exit(spa, SCL_VDEV, FTAG);
|
2010-05-28 20:45:14 +00:00
|
|
|
|
|
|
|
return (dsize);
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ==========================================================================
|
|
|
|
* Initialization and Termination
|
|
|
|
* ==========================================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
spa_name_compare(const void *a1, const void *a2)
|
|
|
|
{
|
|
|
|
const spa_t *s1 = a1;
|
|
|
|
const spa_t *s2 = a2;
|
|
|
|
int s;
|
|
|
|
|
|
|
|
s = strcmp(s1->spa_name, s2->spa_name);
|
|
|
|
if (s > 0)
|
|
|
|
return (1);
|
|
|
|
if (s < 0)
|
|
|
|
return (-1);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2010-08-26 16:52:41 +00:00
|
|
|
spa_boot_init(void)
|
2008-11-20 20:01:55 +00:00
|
|
|
{
|
|
|
|
spa_config_load();
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_init(int mode)
|
|
|
|
{
|
|
|
|
mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
|
|
cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL);
|
|
|
|
|
|
|
|
avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t),
|
|
|
|
offsetof(spa_t, spa_avl));
|
|
|
|
|
|
|
|
avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t),
|
|
|
|
offsetof(spa_aux_t, aux_avl));
|
|
|
|
|
|
|
|
avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t),
|
|
|
|
offsetof(spa_aux_t, aux_avl));
|
|
|
|
|
2009-01-15 21:59:39 +00:00
|
|
|
spa_mode_global = mode;
|
2008-11-20 20:01:55 +00:00
|
|
|
|
2010-08-26 18:42:43 +00:00
|
|
|
fm_init();
|
2008-11-20 20:01:55 +00:00
|
|
|
refcount_init();
|
|
|
|
unique_init();
|
2013-05-06 17:14:52 +00:00
|
|
|
space_map_init();
|
2008-11-20 20:01:55 +00:00
|
|
|
zio_init();
|
|
|
|
dmu_init();
|
|
|
|
zil_init();
|
|
|
|
vdev_cache_stat_init();
|
|
|
|
zfs_prop_init();
|
|
|
|
zpool_prop_init();
|
2012-12-13 23:24:15 +00:00
|
|
|
zpool_feature_init();
|
2008-11-20 20:01:55 +00:00
|
|
|
spa_config_load();
|
2008-12-03 20:09:06 +00:00
|
|
|
l2arc_start();
|
2008-11-20 20:01:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_fini(void)
|
|
|
|
{
|
2008-12-03 20:09:06 +00:00
|
|
|
l2arc_stop();
|
|
|
|
|
2008-11-20 20:01:55 +00:00
|
|
|
spa_evict_all();
|
|
|
|
|
|
|
|
vdev_cache_stat_fini();
|
|
|
|
zil_fini();
|
|
|
|
dmu_fini();
|
|
|
|
zio_fini();
|
2013-05-06 17:14:52 +00:00
|
|
|
space_map_fini();
|
2008-11-20 20:01:55 +00:00
|
|
|
unique_fini();
|
|
|
|
refcount_fini();
|
2010-08-26 18:42:43 +00:00
|
|
|
fm_fini();
|
2008-11-20 20:01:55 +00:00
|
|
|
|
|
|
|
avl_destroy(&spa_namespace_avl);
|
|
|
|
avl_destroy(&spa_spare_avl);
|
|
|
|
avl_destroy(&spa_l2cache_avl);
|
|
|
|
|
|
|
|
cv_destroy(&spa_namespace_cv);
|
|
|
|
mutex_destroy(&spa_namespace_lock);
|
|
|
|
mutex_destroy(&spa_spare_lock);
|
|
|
|
mutex_destroy(&spa_l2cache_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return whether this pool has slogs. No locking needed.
|
|
|
|
* It's not a problem if the wrong answer is returned as it's only for
|
|
|
|
* performance and not correctness
|
|
|
|
*/
|
|
|
|
boolean_t
|
|
|
|
spa_has_slogs(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_log_class->mc_rotor != NULL);
|
|
|
|
}
|
2008-12-03 20:09:06 +00:00
|
|
|
|
2010-05-28 20:45:14 +00:00
|
|
|
spa_log_state_t
|
|
|
|
spa_get_log_state(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_log_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
spa_set_log_state(spa_t *spa, spa_log_state_t state)
|
|
|
|
{
|
|
|
|
spa->spa_log_state = state;
|
|
|
|
}
|
|
|
|
|
2008-12-03 20:09:06 +00:00
|
|
|
boolean_t
|
|
|
|
spa_is_root(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_is_root);
|
|
|
|
}
|
2009-01-15 21:59:39 +00:00
|
|
|
|
|
|
|
boolean_t
|
|
|
|
spa_writeable(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (!!(spa->spa_mode & FWRITE));
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
spa_mode(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_mode);
|
|
|
|
}
|
2010-05-28 20:45:14 +00:00
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_bootfs(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_bootfs);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t
|
|
|
|
spa_delegation(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_delegation);
|
|
|
|
}
|
|
|
|
|
|
|
|
objset_t *
|
|
|
|
spa_meta_objset(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_meta_objset);
|
|
|
|
}
|
|
|
|
|
|
|
|
enum zio_checksum
|
|
|
|
spa_dedup_checksum(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_dedup_checksum);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset pool scan stat per scan pass (or reboot).
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
spa_scan_stat_init(spa_t *spa)
|
|
|
|
{
|
|
|
|
/* data not stored on disk */
|
|
|
|
spa->spa_scan_pass_start = gethrestime_sec();
|
|
|
|
spa->spa_scan_pass_exam = 0;
|
|
|
|
vdev_scan_stat_init(spa->spa_root_vdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get scan stats for zpool status reports
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps)
|
|
|
|
{
|
|
|
|
dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL;
|
|
|
|
|
|
|
|
if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE)
|
2013-03-08 18:41:28 +00:00
|
|
|
return (SET_ERROR(ENOENT));
|
2010-05-28 20:45:14 +00:00
|
|
|
bzero(ps, sizeof (pool_scan_stat_t));
|
|
|
|
|
|
|
|
/* data stored on disk */
|
|
|
|
ps->pss_func = scn->scn_phys.scn_func;
|
|
|
|
ps->pss_start_time = scn->scn_phys.scn_start_time;
|
|
|
|
ps->pss_end_time = scn->scn_phys.scn_end_time;
|
|
|
|
ps->pss_to_examine = scn->scn_phys.scn_to_examine;
|
|
|
|
ps->pss_examined = scn->scn_phys.scn_examined;
|
|
|
|
ps->pss_to_process = scn->scn_phys.scn_to_process;
|
|
|
|
ps->pss_processed = scn->scn_phys.scn_processed;
|
|
|
|
ps->pss_errors = scn->scn_phys.scn_errors;
|
|
|
|
ps->pss_state = scn->scn_phys.scn_state;
|
|
|
|
|
|
|
|
/* data not stored on disk */
|
|
|
|
ps->pss_pass_start = spa->spa_scan_pass_start;
|
|
|
|
ps->pss_pass_exam = spa->spa_scan_pass_exam;
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
2010-08-26 18:49:16 +00:00
|
|
|
|
2011-07-26 19:08:52 +00:00
|
|
|
boolean_t
|
|
|
|
spa_debug_enabled(spa_t *spa)
|
|
|
|
{
|
|
|
|
return (spa->spa_debug);
|
|
|
|
}
|
|
|
|
|
2010-08-26 18:49:16 +00:00
|
|
|
#if defined(_KERNEL) && defined(HAVE_SPL)
|
|
|
|
/* Namespace manipulation */
|
|
|
|
EXPORT_SYMBOL(spa_lookup);
|
|
|
|
EXPORT_SYMBOL(spa_add);
|
|
|
|
EXPORT_SYMBOL(spa_remove);
|
|
|
|
EXPORT_SYMBOL(spa_next);
|
|
|
|
|
|
|
|
/* Refcount functions */
|
|
|
|
EXPORT_SYMBOL(spa_open_ref);
|
|
|
|
EXPORT_SYMBOL(spa_close);
|
|
|
|
EXPORT_SYMBOL(spa_refcount_zero);
|
|
|
|
|
|
|
|
/* Pool configuration lock */
|
|
|
|
EXPORT_SYMBOL(spa_config_tryenter);
|
|
|
|
EXPORT_SYMBOL(spa_config_enter);
|
|
|
|
EXPORT_SYMBOL(spa_config_exit);
|
|
|
|
EXPORT_SYMBOL(spa_config_held);
|
|
|
|
|
|
|
|
/* Pool vdev add/remove lock */
|
|
|
|
EXPORT_SYMBOL(spa_vdev_enter);
|
|
|
|
EXPORT_SYMBOL(spa_vdev_exit);
|
|
|
|
|
|
|
|
/* Pool vdev state change lock */
|
|
|
|
EXPORT_SYMBOL(spa_vdev_state_enter);
|
|
|
|
EXPORT_SYMBOL(spa_vdev_state_exit);
|
|
|
|
|
|
|
|
/* Accessor functions */
|
|
|
|
EXPORT_SYMBOL(spa_shutting_down);
|
|
|
|
EXPORT_SYMBOL(spa_get_dsl);
|
|
|
|
EXPORT_SYMBOL(spa_get_rootblkptr);
|
|
|
|
EXPORT_SYMBOL(spa_set_rootblkptr);
|
|
|
|
EXPORT_SYMBOL(spa_altroot);
|
|
|
|
EXPORT_SYMBOL(spa_sync_pass);
|
|
|
|
EXPORT_SYMBOL(spa_name);
|
|
|
|
EXPORT_SYMBOL(spa_guid);
|
|
|
|
EXPORT_SYMBOL(spa_last_synced_txg);
|
|
|
|
EXPORT_SYMBOL(spa_first_txg);
|
|
|
|
EXPORT_SYMBOL(spa_syncing_txg);
|
|
|
|
EXPORT_SYMBOL(spa_version);
|
|
|
|
EXPORT_SYMBOL(spa_state);
|
|
|
|
EXPORT_SYMBOL(spa_load_state);
|
|
|
|
EXPORT_SYMBOL(spa_freeze_txg);
|
|
|
|
EXPORT_SYMBOL(spa_get_asize);
|
|
|
|
EXPORT_SYMBOL(spa_get_dspace);
|
|
|
|
EXPORT_SYMBOL(spa_update_dspace);
|
|
|
|
EXPORT_SYMBOL(spa_deflate);
|
|
|
|
EXPORT_SYMBOL(spa_normal_class);
|
|
|
|
EXPORT_SYMBOL(spa_log_class);
|
|
|
|
EXPORT_SYMBOL(spa_max_replication);
|
|
|
|
EXPORT_SYMBOL(spa_prev_software_version);
|
|
|
|
EXPORT_SYMBOL(spa_get_failmode);
|
|
|
|
EXPORT_SYMBOL(spa_suspended);
|
|
|
|
EXPORT_SYMBOL(spa_bootfs);
|
|
|
|
EXPORT_SYMBOL(spa_delegation);
|
|
|
|
EXPORT_SYMBOL(spa_meta_objset);
|
|
|
|
|
|
|
|
/* Miscellaneous support routines */
|
|
|
|
EXPORT_SYMBOL(spa_rename);
|
|
|
|
EXPORT_SYMBOL(spa_guid_exists);
|
|
|
|
EXPORT_SYMBOL(spa_strdup);
|
|
|
|
EXPORT_SYMBOL(spa_strfree);
|
|
|
|
EXPORT_SYMBOL(spa_get_random);
|
|
|
|
EXPORT_SYMBOL(spa_generate_guid);
|
|
|
|
EXPORT_SYMBOL(sprintf_blkptr);
|
|
|
|
EXPORT_SYMBOL(spa_freeze);
|
|
|
|
EXPORT_SYMBOL(spa_upgrade);
|
|
|
|
EXPORT_SYMBOL(spa_evict_all);
|
|
|
|
EXPORT_SYMBOL(spa_lookup_by_guid);
|
|
|
|
EXPORT_SYMBOL(spa_has_spare);
|
|
|
|
EXPORT_SYMBOL(dva_get_dsize_sync);
|
|
|
|
EXPORT_SYMBOL(bp_get_dsize_sync);
|
|
|
|
EXPORT_SYMBOL(bp_get_dsize);
|
|
|
|
EXPORT_SYMBOL(spa_has_slogs);
|
|
|
|
EXPORT_SYMBOL(spa_is_root);
|
|
|
|
EXPORT_SYMBOL(spa_writeable);
|
|
|
|
EXPORT_SYMBOL(spa_mode);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(spa_namespace_lock);
|
2013-04-29 22:49:23 +00:00
|
|
|
|
|
|
|
module_param(zfs_deadman_synctime, ulong, 0644);
|
|
|
|
MODULE_PARM_DESC(zfs_deadman_synctime,"Expire in units of zfs_txg_synctime_ms");
|
|
|
|
|
|
|
|
module_param(zfs_deadman_enabled, int, 0644);
|
|
|
|
MODULE_PARM_DESC(zfs_deadman_enabled, "Enable deadman timer");
|
2010-08-26 18:49:16 +00:00
|
|
|
#endif
|