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usr / src / sys / contrib / openzfs / module / zfs /

📁 ..
📄 Makefile.in(4.57 KB)
📄 THIRDPARTYLICENSE.cityhash(1.03 KB)
📄 THIRDPARTYLICENSE.cityhash.descrip(39 B)
📄 abd.c(31.72 KB)
📄 aggsum.c(8.46 KB)
📄 arc.c(330.91 KB)
📄 blkptr.c(4.26 KB)
📄 bplist.c(2.38 KB)
📄 bpobj.c(27.82 KB)
📄 bptree.c(8.2 KB)
📄 bqueue.c(4.7 KB)
📄 btree.c(65.19 KB)
📄 dataset_kstats.c(6.32 KB)
📄 dbuf.c(141.84 KB)
📄 dbuf_stats.c(6.05 KB)
📄 ddt.c(28.01 KB)
📄 ddt_zap.c(4.38 KB)
📄 dmu.c(60.44 KB)
📄 dmu_diff.c(6.25 KB)
📄 dmu_object.c(14.73 KB)
📄 dmu_objset.c(79.38 KB)
📄 dmu_recv.c(98.69 KB)
📄 dmu_redact.c(37.09 KB)
📄 dmu_send.c(95.51 KB)
📄 dmu_traverse.c(21.98 KB)
📄 dmu_tx.c(40.13 KB)
📄 dmu_zfetch.c(13.56 KB)
📄 dnode.c(71.32 KB)
📄 dnode_sync.c(24.93 KB)
📄 dsl_bookmark.c(51.22 KB)
📄 dsl_crypt.c(78.06 KB)
📄 dsl_dataset.c(141.61 KB)
📄 dsl_deadlist.c(27.94 KB)
📄 dsl_deleg.c(19.92 KB)
📄 dsl_destroy.c(36.73 KB)
📄 dsl_dir.c(65.45 KB)
📄 dsl_pool.c(42.92 KB)
📄 dsl_prop.c(32.88 KB)
📄 dsl_scan.c(134.47 KB)
📄 dsl_synctask.c(7.94 KB)
📄 dsl_userhold.c(18.26 KB)
📄 edonr_zfs.c(3.21 KB)
📄 fm.c(39.75 KB)
📄 gzip.c(2.57 KB)
📄 hkdf.c(4.5 KB)
📄 lz4.c(26.46 KB)
📄 lzjb.c(3.85 KB)
📄 metaslab.c(190.62 KB)
📄 mmp.c(24.93 KB)
📄 multilist.c(12.21 KB)
📄 objlist.c(2.58 KB)
📄 pathname.c(2.52 KB)
📄 range_tree.c(24.9 KB)
📄 refcount.c(7.82 KB)
📄 rrwlock.c(10.82 KB)
📄 sa.c(59.23 KB)
📄 sha256.c(2.89 KB)
📄 skein_zfs.c(2.92 KB)
📄 spa.c(272.81 KB)
📄 spa_boot.c(1.28 KB)
📄 spa_checkpoint.c(21.54 KB)
📄 spa_config.c(16.97 KB)
📄 spa_errlog.c(11.35 KB)
📄 spa_history.c(17.75 KB)
📄 spa_log_spacemap.c(47.13 KB)
📄 spa_misc.c(75.4 KB)
📄 spa_stats.c(27.08 KB)
📄 space_map.c(31.45 KB)
📄 space_reftree.c(4.21 KB)
📄 txg.c(27.49 KB)
📄 uberblock.c(2.17 KB)
📄 unique.c(2.53 KB)
📄 vdev.c(143.91 KB)
📄 vdev_cache.c(11.71 KB)
📄 vdev_draid.c(96.86 KB)
📄 vdev_draid_rand.c(1.16 KB)
📄 vdev_indirect.c(60.83 KB)
📄 vdev_indirect_births.c(5.88 KB)
📄 vdev_indirect_mapping.c(18.06 KB)
📄 vdev_initialize.c(22.38 KB)
📄 vdev_label.c(57.52 KB)
📄 vdev_mirror.c(26.76 KB)
📄 vdev_missing.c(3.74 KB)
📄 vdev_queue.c(37.61 KB)
📄 vdev_raidz.c(76.09 KB)
📄 vdev_raidz_math.c(17.18 KB)
📄 vdev_raidz_math_aarch64_neon.c(112.13 KB)
📄 vdev_raidz_math_aarch64_neon_common.h(23.64 KB)
📄 vdev_raidz_math_aarch64_neonx2.c(5.39 KB)
📄 vdev_raidz_math_avx2.c(10.64 KB)
📄 vdev_raidz_math_avx512bw.c(10.93 KB)
📄 vdev_raidz_math_avx512f.c(17.9 KB)
📄 vdev_raidz_math_impl.h(34.78 KB)
📄 vdev_raidz_math_powerpc_altivec.c(213.46 KB)
📄 vdev_raidz_math_powerpc_altivec_common.h(22.62 KB)
📄 vdev_raidz_math_scalar.c(9.54 KB)
📄 vdev_raidz_math_sse2.c(25.84 KB)
📄 vdev_raidz_math_ssse3.c(118 KB)
📄 vdev_rebuild.c(34.65 KB)
📄 vdev_removal.c(72.08 KB)
📄 vdev_root.c(4.28 KB)
📄 vdev_trim.c(50.92 KB)
📄 zap.c(35.35 KB)
📄 zap_leaf.c(22.75 KB)
📄 zap_micro.c(42.18 KB)
📄 zcp.c(42.29 KB)
📄 zcp_get.c(21.01 KB)
📄 zcp_global.c(1.9 KB)
📄 zcp_iter.c(18.21 KB)
📄 zcp_set.c(2.37 KB)
📄 zcp_synctask.c(13.69 KB)
📄 zfeature.c(17.6 KB)
📄 zfs_byteswap.c(5.64 KB)
📄 zfs_fm.c(40.58 KB)
📄 zfs_fuid.c(19.69 KB)
📄 zfs_ioctl.c(195.48 KB)
📄 zfs_log.c(20.6 KB)
📄 zfs_onexit.c(5.09 KB)
📄 zfs_quota.c(12.93 KB)
📄 zfs_ratelimit.c(2.35 KB)
📄 zfs_replay.c(26.11 KB)
📄 zfs_rlock.c(20.38 KB)
📄 zfs_sa.c(13.09 KB)
📄 zfs_vnops.c(22 KB)
📄 zil.c(111.32 KB)
📄 zio.c(144.72 KB)
📄 zio_checksum.c(17.28 KB)
📄 zio_compress.c(5.92 KB)
📄 zio_inject.c(25.79 KB)
📄 zle.c(2.52 KB)
📄 zrlock.c(4.45 KB)
📄 zthr.c(16.41 KB)
📄 zvol.c(42.96 KB)

Editing: bqueue.c

/*
 * CDDL HEADER START
 *
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2014, 2018 by Delphix. All rights reserved.
 */

#include	<sys/bqueue.h>
#include	<sys/zfs_context.h>

static inline bqueue_node_t *
obj2node(bqueue_t *q, void *data)
{
	return ((bqueue_node_t *)((char *)data + q->bq_node_offset));
}

/*
 * Initialize a blocking queue  The maximum capacity of the queue is set to
 * size.  Types that are stored in a bqueue must contain a bqueue_node_t,
 * and node_offset must be its offset from the start of the struct.
 * fill_fraction is a performance tuning value; when the queue is full, any
 * threads attempting to enqueue records will block.  They will block until
 * they're signaled, which will occur when the queue is at least 1/fill_fraction
 * empty.  Similar behavior occurs on dequeue; if the queue is empty, threads
 * block.  They will be signalled when the queue has 1/fill_fraction full, or
 * when bqueue_flush is called.  As a result, you must call bqueue_flush when
 * you enqueue your final record on a thread, in case the dequeueing threads are
 * currently blocked and that enqueue does not cause them to be awoken.
 * Alternatively, this behavior can be disabled (causing signaling to happen
 * immediately) by setting fill_fraction to any value larger than size.
 * Return 0 on success, or -1 on failure.
 */
int
bqueue_init(bqueue_t *q, uint64_t fill_fraction, uint64_t size,
    size_t node_offset)
{
	if (fill_fraction == 0) {
		return (-1);
	}
	list_create(&q->bq_list, node_offset + sizeof (bqueue_node_t),
	    node_offset + offsetof(bqueue_node_t, bqn_node));
	cv_init(&q->bq_add_cv, NULL, CV_DEFAULT, NULL);
	cv_init(&q->bq_pop_cv, NULL, CV_DEFAULT, NULL);
	mutex_init(&q->bq_lock, NULL, MUTEX_DEFAULT, NULL);
	q->bq_node_offset = node_offset;
	q->bq_size = 0;
	q->bq_maxsize = size;
	q->bq_fill_fraction = fill_fraction;
	return (0);
}

/*
 * Destroy a blocking queue.  This function asserts that there are no
 * elements in the queue, and no one is blocked on the condition
 * variables.
 */
void
bqueue_destroy(bqueue_t *q)
{
	mutex_enter(&q->bq_lock);
	ASSERT0(q->bq_size);
	cv_destroy(&q->bq_add_cv);
	cv_destroy(&q->bq_pop_cv);
	list_destroy(&q->bq_list);
	mutex_exit(&q->bq_lock);
	mutex_destroy(&q->bq_lock);
}

static void
bqueue_enqueue_impl(bqueue_t *q, void *data, uint64_t item_size,
    boolean_t flush)
{
	ASSERT3U(item_size, >, 0);
	ASSERT3U(item_size, <=, q->bq_maxsize);
	mutex_enter(&q->bq_lock);
	obj2node(q, data)->bqn_size = item_size;
	while (q->bq_size + item_size > q->bq_maxsize) {
		cv_wait_sig(&q->bq_add_cv, &q->bq_lock);
	}
	q->bq_size += item_size;
	list_insert_tail(&q->bq_list, data);
	if (q->bq_size >= q->bq_maxsize / q->bq_fill_fraction)
		cv_signal(&q->bq_pop_cv);
	if (flush)
		cv_broadcast(&q->bq_pop_cv);
	mutex_exit(&q->bq_lock);
}

/*
 * Add data to q, consuming size units of capacity.  If there is insufficient
 * capacity to consume size units, block until capacity exists.  Asserts size is
 * > 0.
 */
void
bqueue_enqueue(bqueue_t *q, void *data, uint64_t item_size)
{
	bqueue_enqueue_impl(q, data, item_size, B_FALSE);
}

/*
 * Enqueue an entry, and then flush the queue.  This forces the popping threads
 * to wake up, even if we're below the fill fraction.  We have this in a single
 * function, rather than having a separate call, because it prevents race
 * conditions between the enqueuing thread and the dequeueing thread, where the
 * enqueueing thread will wake up the dequeueing thread, that thread will
 * destroy the condvar before the enqueuing thread is done.
 */
void
bqueue_enqueue_flush(bqueue_t *q, void *data, uint64_t item_size)
{
	bqueue_enqueue_impl(q, data, item_size, B_TRUE);
}

/*
 * Take the first element off of q.  If there are no elements on the queue, wait
 * until one is put there.  Return the removed element.
 */
void *
bqueue_dequeue(bqueue_t *q)
{
	void *ret = NULL;
	uint64_t item_size;
	mutex_enter(&q->bq_lock);
	while (q->bq_size == 0) {
		cv_wait_sig(&q->bq_pop_cv, &q->bq_lock);
	}
	ret = list_remove_head(&q->bq_list);
	ASSERT3P(ret, !=, NULL);
	item_size = obj2node(q, ret)->bqn_size;
	q->bq_size -= item_size;
	if (q->bq_size <= q->bq_maxsize - (q->bq_maxsize / q->bq_fill_fraction))
		cv_signal(&q->bq_add_cv);
	mutex_exit(&q->bq_lock);
	return (ret);
}

/*
 * Returns true if the space used is 0.
 */
boolean_t
bqueue_empty(bqueue_t *q)
{
	return (q->bq_size == 0);
}

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Editing: bqueue.c

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