5e8cd5d17f
5981 Deadlock in dmu_objset_find_dp Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Dan McDonald <danmcd@omniti.com> Approved by: Robert Mustacchi <rm@joyent.com> References: https://www.illumos.org/issues/5981 https://github.com/illumos/illumos-gate/commit/1d3f896 Ported-by: kernelOfTruth kerneloftruth@gmail.com Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #3553
180 lines
5.5 KiB
C
180 lines
5.5 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_DSL_POOL_H
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#define _SYS_DSL_POOL_H
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#include <sys/spa.h>
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#include <sys/txg.h>
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#include <sys/txg_impl.h>
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#include <sys/zfs_context.h>
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#include <sys/zio.h>
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#include <sys/dnode.h>
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#include <sys/ddt.h>
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#include <sys/arc.h>
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#include <sys/bpobj.h>
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#include <sys/bptree.h>
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#include <sys/rrwlock.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int zfs_txg_synctime_ms;
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struct objset;
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struct dsl_dir;
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struct dsl_dataset;
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struct dsl_pool;
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struct dmu_tx;
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struct dsl_scan;
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extern unsigned long zfs_dirty_data_max;
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extern unsigned long zfs_dirty_data_max_max;
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extern unsigned long zfs_dirty_data_sync;
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extern int zfs_dirty_data_max_percent;
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extern int zfs_dirty_data_max_max_percent;
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extern int zfs_delay_min_dirty_percent;
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extern unsigned long zfs_delay_scale;
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/* These macros are for indexing into the zfs_all_blkstats_t. */
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#define DMU_OT_DEFERRED DMU_OT_NONE
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#define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
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#define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
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typedef struct zfs_blkstat {
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uint64_t zb_count;
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uint64_t zb_asize;
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uint64_t zb_lsize;
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uint64_t zb_psize;
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uint64_t zb_gangs;
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uint64_t zb_ditto_2_of_2_samevdev;
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uint64_t zb_ditto_2_of_3_samevdev;
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uint64_t zb_ditto_3_of_3_samevdev;
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} zfs_blkstat_t;
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typedef struct zfs_all_blkstats {
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zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
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} zfs_all_blkstats_t;
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typedef struct dsl_pool {
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/* Immutable */
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spa_t *dp_spa;
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struct objset *dp_meta_objset;
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struct dsl_dir *dp_root_dir;
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struct dsl_dir *dp_mos_dir;
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struct dsl_dir *dp_free_dir;
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struct dsl_dir *dp_leak_dir;
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struct dsl_dataset *dp_origin_snap;
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uint64_t dp_root_dir_obj;
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struct taskq *dp_iput_taskq;
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/* No lock needed - sync context only */
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blkptr_t dp_meta_rootbp;
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uint64_t dp_tmp_userrefs_obj;
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bpobj_t dp_free_bpobj;
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uint64_t dp_bptree_obj;
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uint64_t dp_empty_bpobj;
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struct dsl_scan *dp_scan;
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/* Uses dp_lock */
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kmutex_t dp_lock;
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kcondvar_t dp_spaceavail_cv;
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uint64_t dp_dirty_pertxg[TXG_SIZE];
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uint64_t dp_dirty_total;
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uint64_t dp_mos_used_delta;
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uint64_t dp_mos_compressed_delta;
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uint64_t dp_mos_uncompressed_delta;
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/*
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* Time of most recently scheduled (furthest in the future)
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* wakeup for delayed transactions.
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*/
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hrtime_t dp_last_wakeup;
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/* Has its own locking */
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tx_state_t dp_tx;
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txg_list_t dp_dirty_datasets;
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txg_list_t dp_dirty_zilogs;
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txg_list_t dp_dirty_dirs;
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txg_list_t dp_sync_tasks;
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/*
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* Protects administrative changes (properties, namespace)
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*
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* It is only held for write in syncing context. Therefore
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* syncing context does not need to ever have it for read, since
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* nobody else could possibly have it for write.
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*/
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rrwlock_t dp_config_rwlock;
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zfs_all_blkstats_t *dp_blkstats;
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} dsl_pool_t;
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int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
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int dsl_pool_open(dsl_pool_t *dp);
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void dsl_pool_close(dsl_pool_t *dp);
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dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
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void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
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void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
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int dsl_pool_sync_context(dsl_pool_t *dp);
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uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
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uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
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void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
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void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
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void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
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void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
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const blkptr_t *bpp);
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void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
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int64_t used, int64_t comp, int64_t uncomp);
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boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
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void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
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boolean_t dsl_pool_config_held(dsl_pool_t *dp);
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boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
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taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
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int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, uint64_t now, dmu_tx_t *tx);
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int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, dmu_tx_t *tx);
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void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
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int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
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int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
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void dsl_pool_rele(dsl_pool_t *dp, void *tag);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_POOL_H */
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