6283f55ea1
One of the neat tricks an autoconf style project is capable of is allow configurion/building in a directory other than the source directory. The major advantage to this is that you can build the project various different ways while making changes in a single source tree. For example, this project is designed to work on various different Linux distributions each of which work slightly differently. This means that changes need to verified on each of those supported distributions perferably before the change is committed to the public git repo. Using nfs and custom build directories makes this much easier. I now have a single source tree in nfs mounted on several different systems each running a supported distribution. When I make a change to the source base I suspect may break things I can concurrently build from the same source on all the systems each in their own subdirectory. wget -c http://github.com/downloads/behlendorf/zfs/zfs-x.y.z.tar.gz tar -xzf zfs-x.y.z.tar.gz cd zfs-x-y-z ------------------------- run concurrently ---------------------- <ubuntu system> <fedora system> <debian system> <rhel6 system> mkdir ubuntu mkdir fedora mkdir debian mkdir rhel6 cd ubuntu cd fedora cd debian cd rhel6 ../configure ../configure ../configure ../configure make make make make make check make check make check make check This change also moves many of the include headers from individual incude/sys directories under the modules directory in to a single top level include directory. This has the advantage of making the build rules cleaner and logically it makes a bit more sense.
132 lines
4.1 KiB
C
132 lines
4.1 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 2010 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_TXG_H
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#define _SYS_TXG_H
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#include <sys/spa.h>
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#include <sys/zfs_context.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TXG_CONCURRENT_STATES 3 /* open, quiescing, syncing */
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#define TXG_SIZE 4 /* next power of 2 */
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#define TXG_MASK (TXG_SIZE - 1) /* mask for size */
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#define TXG_INITIAL TXG_SIZE /* initial txg */
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#define TXG_IDX (txg & TXG_MASK)
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/* Number of txgs worth of frees we defer adding to in-core spacemaps */
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#define TXG_DEFER_SIZE 2
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#define TXG_WAIT 1ULL
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#define TXG_NOWAIT 2ULL
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typedef struct tx_cpu tx_cpu_t;
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typedef struct txg_handle {
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tx_cpu_t *th_cpu;
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uint64_t th_txg;
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} txg_handle_t;
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typedef struct txg_node {
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struct txg_node *tn_next[TXG_SIZE];
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uint8_t tn_member[TXG_SIZE];
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} txg_node_t;
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typedef struct txg_list {
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kmutex_t tl_lock;
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size_t tl_offset;
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txg_node_t *tl_head[TXG_SIZE];
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} txg_list_t;
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struct dsl_pool;
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extern void txg_init(struct dsl_pool *dp, uint64_t txg);
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extern void txg_fini(struct dsl_pool *dp);
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extern void txg_sync_start(struct dsl_pool *dp);
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extern void txg_sync_stop(struct dsl_pool *dp);
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extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp);
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extern void txg_rele_to_quiesce(txg_handle_t *txghp);
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extern void txg_rele_to_sync(txg_handle_t *txghp);
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extern void txg_register_callbacks(txg_handle_t *txghp, list_t *tx_callbacks);
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/*
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* Delay the caller by the specified number of ticks or until
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* the txg closes (whichever comes first). This is intended
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* to be used to throttle writers when the system nears its
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* capacity.
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*/
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extern void txg_delay(struct dsl_pool *dp, uint64_t txg, int ticks);
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/*
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* Wait until the given transaction group has finished syncing.
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* Try to make this happen as soon as possible (eg. kick off any
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* necessary syncs immediately). If txg==0, wait for the currently open
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* txg to finish syncing.
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*/
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extern void txg_wait_synced(struct dsl_pool *dp, uint64_t txg);
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/*
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* Wait until the given transaction group, or one after it, is
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* the open transaction group. Try to make this happen as soon
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* as possible (eg. kick off any necessary syncs immediately).
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* If txg == 0, wait for the next open txg.
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*/
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extern void txg_wait_open(struct dsl_pool *dp, uint64_t txg);
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/*
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* Returns TRUE if we are "backed up" waiting for the syncing
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* transaction to complete; otherwise returns FALSE.
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*/
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extern boolean_t txg_stalled(struct dsl_pool *dp);
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/* returns TRUE if someone is waiting for the next txg to sync */
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extern boolean_t txg_sync_waiting(struct dsl_pool *dp);
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/*
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* Per-txg object lists.
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*/
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#define TXG_CLEAN(txg) ((txg) - 1)
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extern void txg_list_create(txg_list_t *tl, size_t offset);
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extern void txg_list_destroy(txg_list_t *tl);
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extern int txg_list_empty(txg_list_t *tl, uint64_t txg);
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extern int txg_list_add(txg_list_t *tl, void *p, uint64_t txg);
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extern int txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg);
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extern void *txg_list_remove(txg_list_t *tl, uint64_t txg);
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extern void *txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg);
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extern int txg_list_member(txg_list_t *tl, void *p, uint64_t txg);
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extern void *txg_list_head(txg_list_t *tl, uint64_t txg);
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extern void *txg_list_next(txg_list_t *tl, void *p, uint64_t txg);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_TXG_H */
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