| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| /* |
| * Copyright (c) 2012, Joyent, Inc. All rights reserved. |
| * Copyright (c) 2013, 2015 by Delphix. All rights reserved. |
| */ |
| |
| #ifndef _SYS_DMU_IMPL_H |
| #define _SYS_DMU_IMPL_H |
| |
| #include <sys/txg_impl.h> |
| #include <sys/zio.h> |
| #include <sys/dnode.h> |
| #include <sys/zfs_context.h> |
| #include <sys/zfs_ioctl.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * This is the locking strategy for the DMU. Numbers in parenthesis are |
| * cases that use that lock order, referenced below: |
| * |
| * ARC is self-contained |
| * bplist is self-contained |
| * refcount is self-contained |
| * txg is self-contained (hopefully!) |
| * zst_lock |
| * zf_rwlock |
| * |
| * XXX try to improve evicting path? |
| * |
| * dp_config_rwlock > os_obj_lock > dn_struct_rwlock > |
| * dn_dbufs_mtx > hash_mutexes > db_mtx > dd_lock > leafs |
| * |
| * dp_config_rwlock |
| * must be held before: everything |
| * protects dd namespace changes |
| * protects property changes globally |
| * held from: |
| * dsl_dir_open/r: |
| * dsl_dir_create_sync/w: |
| * dsl_dir_sync_destroy/w: |
| * dsl_dir_rename_sync/w: |
| * dsl_prop_changed_notify/r: |
| * |
| * os_obj_lock |
| * must be held before: |
| * everything except dp_config_rwlock |
| * protects os_obj_next |
| * held from: |
| * dmu_object_alloc: dn_dbufs_mtx, db_mtx, hash_mutexes, dn_struct_rwlock |
| * |
| * dn_struct_rwlock |
| * must be held before: |
| * everything except dp_config_rwlock and os_obj_lock |
| * protects structure of dnode (eg. nlevels) |
| * db_blkptr can change when syncing out change to nlevels |
| * dn_maxblkid |
| * dn_nlevels |
| * dn_*blksz* |
| * phys nlevels, maxblkid, physical blkptr_t's (?) |
| * held from: |
| * callers of dbuf_read_impl, dbuf_hold[_impl], dbuf_prefetch |
| * dmu_object_info_from_dnode: dn_dirty_mtx (dn_datablksz) |
| * dbuf_read_impl: db_mtx, dmu_zfetch() |
| * dmu_zfetch: zf_rwlock/r, zst_lock, dbuf_prefetch() |
| * dbuf_new_size: db_mtx |
| * dbuf_dirty: db_mtx |
| * dbuf_findbp: (callers, phys? - the real need) |
| * dbuf_create: dn_dbufs_mtx, hash_mutexes, db_mtx (phys?) |
| * dbuf_prefetch: dn_dirty_mtx, hash_mutexes, db_mtx, dn_dbufs_mtx |
| * dbuf_hold_impl: hash_mutexes, db_mtx, dn_dbufs_mtx, dbuf_findbp() |
| * dnode_sync/w (increase_indirection): db_mtx (phys) |
| * dnode_set_blksz/w: dn_dbufs_mtx (dn_*blksz*) |
| * dnode_new_blkid/w: (dn_maxblkid) |
| * dnode_free_range/w: dn_dirty_mtx (dn_maxblkid) |
| * dnode_next_offset: (phys) |
| * |
| * dn_dbufs_mtx |
| * must be held before: |
| * db_mtx, hash_mutexes |
| * protects: |
| * dn_dbufs |
| * dn_evicted |
| * held from: |
| * dmu_evict_user: db_mtx (dn_dbufs) |
| * dbuf_free_range: db_mtx (dn_dbufs) |
| * dbuf_remove_ref: db_mtx, callees: |
| * dbuf_hash_remove: hash_mutexes, db_mtx |
| * dbuf_create: hash_mutexes, db_mtx (dn_dbufs) |
| * dnode_set_blksz: (dn_dbufs) |
| * |
| * hash_mutexes (global) |
| * must be held before: |
| * db_mtx |
| * protects dbuf_hash_table (global) and db_hash_next |
| * held from: |
| * dbuf_find: db_mtx |
| * dbuf_hash_insert: db_mtx |
| * dbuf_hash_remove: db_mtx |
| * |
| * db_mtx (meta-leaf) |
| * must be held before: |
| * dn_mtx, dn_dirty_mtx, dd_lock (leaf mutexes) |
| * protects: |
| * db_state |
| * db_holds |
| * db_buf |
| * db_changed |
| * db_data_pending |
| * db_dirtied |
| * db_link |
| * db_dirty_node (??) |
| * db_dirtycnt |
| * db_d.* |
| * db.* |
| * held from: |
| * dbuf_dirty: dn_mtx, dn_dirty_mtx |
| * dbuf_dirty->dsl_dir_willuse_space: dd_lock |
| * dbuf_dirty->dbuf_new_block->dsl_dataset_block_freeable: dd_lock |
| * dbuf_undirty: dn_dirty_mtx (db_d) |
| * dbuf_write_done: dn_dirty_mtx (db_state) |
| * dbuf_* |
| * dmu_buf_update_user: none (db_d) |
| * dmu_evict_user: none (db_d) (maybe can eliminate) |
| * dbuf_find: none (db_holds) |
| * dbuf_hash_insert: none (db_holds) |
| * dmu_buf_read_array_impl: none (db_state, db_changed) |
| * dmu_sync: none (db_dirty_node, db_d) |
| * dnode_reallocate: none (db) |
| * |
| * dn_mtx (leaf) |
| * protects: |
| * dn_dirty_dbufs |
| * dn_ranges |
| * phys accounting |
| * dn_allocated_txg |
| * dn_free_txg |
| * dn_assigned_txg |
| * dn_dirty_txg |
| * dd_assigned_tx |
| * dn_notxholds |
| * dn_dirtyctx |
| * dn_dirtyctx_firstset |
| * (dn_phys copy fields?) |
| * (dn_phys contents?) |
| * held from: |
| * dnode_* |
| * dbuf_dirty: none |
| * dbuf_sync: none (phys accounting) |
| * dbuf_undirty: none (dn_ranges, dn_dirty_dbufs) |
| * dbuf_write_done: none (phys accounting) |
| * dmu_object_info_from_dnode: none (accounting) |
| * dmu_tx_commit: none |
| * dmu_tx_hold_object_impl: none |
| * dmu_tx_try_assign: dn_notxholds(cv) |
| * dmu_tx_unassign: none |
| * |
| * dd_lock |
| * must be held before: |
| * ds_lock |
| * ancestors' dd_lock |
| * protects: |
| * dd_prop_cbs |
| * dd_sync_* |
| * dd_used_bytes |
| * dd_tempreserved |
| * dd_space_towrite |
| * dd_myname |
| * dd_phys accounting? |
| * held from: |
| * dsl_dir_* |
| * dsl_prop_changed_notify: none (dd_prop_cbs) |
| * dsl_prop_register: none (dd_prop_cbs) |
| * dsl_prop_unregister: none (dd_prop_cbs) |
| * |
| * os_lock (leaf) |
| * protects: |
| * os_dirty_dnodes |
| * os_free_dnodes |
| * os_dnodes |
| * os_downgraded_dbufs |
| * dn_dirtyblksz |
| * dn_dirty_link |
| * held from: |
| * dnode_create: none (os_dnodes) |
| * dnode_destroy: none (os_dnodes) |
| * dnode_setdirty: none (dn_dirtyblksz, os_*_dnodes) |
| * dnode_free: none (dn_dirtyblksz, os_*_dnodes) |
| * |
| * ds_lock |
| * protects: |
| * ds_objset |
| * ds_open_refcount |
| * ds_snapname |
| * ds_phys accounting |
| * ds_phys userrefs zapobj |
| * ds_reserved |
| * held from: |
| * dsl_dataset_* |
| * |
| * dr_mtx (leaf) |
| * protects: |
| * dr_children |
| * held from: |
| * dbuf_dirty |
| * dbuf_undirty |
| * dbuf_sync_indirect |
| * dnode_new_blkid |
| */ |
| |
| struct objset; |
| struct dmu_pool; |
| |
| typedef struct dmu_xuio { |
| int next; |
| int cnt; |
| struct arc_buf **bufs; |
| iovec_t *iovp; |
| } dmu_xuio_t; |
| |
| /* |
| * The list of data whose inclusion in a send stream can be pending from |
| * one call to backup_cb to another. Multiple calls to dump_free() and |
| * dump_freeobjects() can be aggregated into a single DRR_FREE or |
| * DRR_FREEOBJECTS replay record. |
| */ |
| typedef enum { |
| PENDING_NONE, |
| PENDING_FREE, |
| PENDING_FREEOBJECTS |
| } dmu_pendop_t; |
| |
| typedef struct dmu_sendarg { |
| list_node_t dsa_link; |
| dmu_replay_record_t *dsa_drr; |
| vnode_t *dsa_vp; |
| int dsa_outfd; |
| proc_t *dsa_proc; |
| offset_t *dsa_off; |
| objset_t *dsa_os; |
| zio_cksum_t dsa_zc; |
| uint64_t dsa_toguid; |
| uint64_t dsa_fromtxg; |
| int dsa_err; |
| dmu_pendop_t dsa_pending_op; |
| uint64_t dsa_featureflags; |
| uint64_t dsa_last_data_object; |
| uint64_t dsa_last_data_offset; |
| uint64_t dsa_resume_object; |
| uint64_t dsa_resume_offset; |
| boolean_t dsa_sent_begin; |
| boolean_t dsa_sent_end; |
| boolean_t block_diff; |
| } dmu_sendarg_t; |
| |
| void dmu_object_zapify(objset_t *, uint64_t, dmu_object_type_t, dmu_tx_t *); |
| void dmu_object_free_zapified(objset_t *, uint64_t, dmu_tx_t *); |
| int dmu_buf_hold_noread(objset_t *, uint64_t, uint64_t, |
| void *, dmu_buf_t **); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _SYS_DMU_IMPL_H */ |