mirror of
https://git.proxmox.com/git/mirror_zfs
synced 2025-11-04 01:41:27 +00:00
5fa356ea44
The original xuio zero copy functionality has always been unused on Linux and FreeBSD. Remove this disabled code to avoid any confusion and improve readability. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Matt Macy <mmacy@FreeBSD.org> Closes #11124
258 lines
6.9 KiB
C
258 lines
6.9 KiB
C
/*
|
|
* 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, 2018 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_nodnholds
|
|
* 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_sendstatus {
|
|
list_node_t dss_link;
|
|
int dss_outfd;
|
|
proc_t *dss_proc;
|
|
offset_t *dss_off;
|
|
uint64_t dss_blocks; /* blocks visited during the sending process */
|
|
} dmu_sendstatus_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 */
|