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📄 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: bptree.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 (c) 2011, 2018 by Delphix. All rights reserved.
 */

#include <sys/arc.h>
#include <sys/bptree.h>
#include <sys/dmu.h>
#include <sys/dmu_objset.h>
#include <sys/dmu_tx.h>
#include <sys/dmu_traverse.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_pool.h>
#include <sys/dnode.h>
#include <sys/spa.h>

/*
 * A bptree is a queue of root block pointers from destroyed datasets. When a
 * dataset is destroyed its root block pointer is put on the end of the pool's
 * bptree queue so the dataset's blocks can be freed asynchronously by
 * dsl_scan_sync. This allows the delete operation to finish without traversing
 * all the dataset's blocks.
 *
 * Note that while bt_begin and bt_end are only ever incremented in this code,
 * they are effectively reset to 0 every time the entire bptree is freed because
 * the bptree's object is destroyed and re-created.
 */

struct bptree_args {
	bptree_phys_t *ba_phys;	/* data in bonus buffer, dirtied if freeing */
	boolean_t ba_free;	/* true if freeing during traversal */

bptree_itor_t *ba_func;	/* function to call for each blockpointer */
	void *ba_arg;		/* caller supplied argument to ba_func */
	dmu_tx_t *ba_tx;	/* caller supplied tx, NULL if not freeing */
} bptree_args_t;

uint64_t
bptree_alloc(objset_t *os, dmu_tx_t *tx)
{
	uint64_t obj;
	dmu_buf_t *db;
	bptree_phys_t *bt;

obj = dmu_object_alloc(os, DMU_OTN_UINT64_METADATA,
	    SPA_OLD_MAXBLOCKSIZE, DMU_OTN_UINT64_METADATA,
	    sizeof (bptree_phys_t), tx);

/*
	 * Bonus buffer contents are already initialized to 0, but for
	 * readability we make it explicit.
	 */
	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
	dmu_buf_will_dirty(db, tx);
	bt = db->db_data;
	bt->bt_begin = 0;
	bt->bt_end = 0;
	bt->bt_bytes = 0;
	bt->bt_comp = 0;
	bt->bt_uncomp = 0;
	dmu_buf_rele(db, FTAG);

return (obj);
}

int
bptree_free(objset_t *os, uint64_t obj, dmu_tx_t *tx)
{
	dmu_buf_t *db;
	bptree_phys_t *bt;

VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
	bt = db->db_data;
	ASSERT3U(bt->bt_begin, ==, bt->bt_end);
	ASSERT0(bt->bt_bytes);
	ASSERT0(bt->bt_comp);
	ASSERT0(bt->bt_uncomp);
	dmu_buf_rele(db, FTAG);

return (dmu_object_free(os, obj, tx));
}

boolean_t
bptree_is_empty(objset_t *os, uint64_t obj)
{
	dmu_buf_t *db;
	bptree_phys_t *bt;
	boolean_t rv;

VERIFY0(dmu_bonus_hold(os, obj, FTAG, &db));
	bt = db->db_data;
	rv = (bt->bt_begin == bt->bt_end);
	dmu_buf_rele(db, FTAG);
	return (rv);
}

void
bptree_add(objset_t *os, uint64_t obj, blkptr_t *bp, uint64_t birth_txg,
    uint64_t bytes, uint64_t comp, uint64_t uncomp, dmu_tx_t *tx)
{
	dmu_buf_t *db;
	bptree_phys_t *bt;
	bptree_entry_phys_t *bte;

/*
	 * bptree objects are in the pool mos, therefore they can only be
	 * modified in syncing context. Furthermore, this is only modified
	 * by the sync thread, so no locking is necessary.
	 */
	ASSERT(dmu_tx_is_syncing(tx));

VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
	bt = db->db_data;

bte = kmem_zalloc(sizeof (*bte), KM_SLEEP);
	bte->be_birth_txg = birth_txg;
	bte->be_bp = *bp;
	dmu_write(os, obj, bt->bt_end * sizeof (*bte), sizeof (*bte), bte, tx);
	kmem_free(bte, sizeof (*bte));

dmu_buf_will_dirty(db, tx);
	bt->bt_end++;
	bt->bt_bytes += bytes;
	bt->bt_comp += comp;
	bt->bt_uncomp += uncomp;
	dmu_buf_rele(db, FTAG);
}

/* ARGSUSED */
static int
bptree_visit_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
{
	int err;
	struct bptree_args *ba = arg;

if (zb->zb_level == ZB_DNODE_LEVEL || BP_IS_HOLE(bp) ||
	    BP_IS_REDACTED(bp))
		return (0);

err = ba->ba_func(ba->ba_arg, bp, ba->ba_tx);
	if (err == 0 && ba->ba_free) {
		ba->ba_phys->bt_bytes -= bp_get_dsize_sync(spa, bp);
		ba->ba_phys->bt_comp -= BP_GET_PSIZE(bp);
		ba->ba_phys->bt_uncomp -= BP_GET_UCSIZE(bp);
	}
	return (err);
}

/*
 * If "free" is set:
 *  - It is assumed that "func" will be freeing the block pointers.
 *  - If "func" returns nonzero, the bookmark will be remembered and
 *    iteration will be restarted from this point on next invocation.
 *  - If an i/o error is encountered (e.g. "func" returns EIO or ECKSUM),
 *    bptree_iterate will remember the bookmark, continue traversing
 *    any additional entries, and return 0.
 *
 * If "free" is not set, traversal will stop and return an error if
 * an i/o error is encountered.
 *
 * In either case, if zfs_free_leak_on_eio is set, i/o errors will be
 * ignored and traversal will continue (i.e. TRAVERSE_HARD will be passed to
 * traverse_dataset_destroyed()).
 */
int
bptree_iterate(objset_t *os, uint64_t obj, boolean_t free, bptree_itor_t func,
    void *arg, dmu_tx_t *tx)
{
	boolean_t ioerr = B_FALSE;
	int err;
	uint64_t i;
	dmu_buf_t *db;
	struct bptree_args ba;

ASSERT(!free || dmu_tx_is_syncing(tx));

err = dmu_bonus_hold(os, obj, FTAG, &db);
	if (err != 0)
		return (err);

if (free)
		dmu_buf_will_dirty(db, tx);

ba.ba_phys = db->db_data;
	ba.ba_free = free;
	ba.ba_func = func;
	ba.ba_arg = arg;
	ba.ba_tx = tx;

err = 0;
	for (i = ba.ba_phys->bt_begin; i < ba.ba_phys->bt_end; i++) {
		bptree_entry_phys_t bte;
		int flags = TRAVERSE_PREFETCH_METADATA | TRAVERSE_POST |
		    TRAVERSE_NO_DECRYPT;

err = dmu_read(os, obj, i * sizeof (bte), sizeof (bte),
		    &bte, DMU_READ_NO_PREFETCH);
		if (err != 0)
			break;

if (zfs_free_leak_on_eio)
			flags |= TRAVERSE_HARD;
		zfs_dbgmsg("bptree index %lld: traversing from min_txg=%lld "
		    "bookmark %lld/%lld/%lld/%lld",
		    (longlong_t)i,
		    (longlong_t)bte.be_birth_txg,
		    (longlong_t)bte.be_zb.zb_objset,
		    (longlong_t)bte.be_zb.zb_object,
		    (longlong_t)bte.be_zb.zb_level,
		    (longlong_t)bte.be_zb.zb_blkid);
		err = traverse_dataset_destroyed(os->os_spa, &bte.be_bp,
		    bte.be_birth_txg, &bte.be_zb, flags,
		    bptree_visit_cb, &ba);
		if (free) {
			/*
			 * The callback has freed the visited block pointers.
			 * Record our traversal progress on disk, either by
			 * updating this record's bookmark, or by logically
			 * removing this record by advancing bt_begin.
			 */
			if (err != 0) {
				/* save bookmark for future resume */
				ASSERT3U(bte.be_zb.zb_objset, ==,
				    ZB_DESTROYED_OBJSET);
				ASSERT0(bte.be_zb.zb_level);
				dmu_write(os, obj, i * sizeof (bte),
				    sizeof (bte), &bte, tx);
				if (err == EIO || err == ECKSUM ||
				    err == ENXIO) {
					/*
					 * Skip the rest of this tree and
					 * continue on to the next entry.
					 */
					err = 0;
					ioerr = B_TRUE;
				} else {
					break;
				}
			} else if (ioerr) {
				/*
				 * This entry is finished, but there were
				 * i/o errors on previous entries, so we
				 * can't adjust bt_begin.  Set this entry's
				 * be_birth_txg such that it will be
				 * treated as a no-op in future traversals.
				 */
				bte.be_birth_txg = UINT64_MAX;
				dmu_write(os, obj, i * sizeof (bte),
				    sizeof (bte), &bte, tx);
			}

if (!ioerr) {
				ba.ba_phys->bt_begin++;
				(void) dmu_free_range(os, obj,
				    i * sizeof (bte), sizeof (bte), tx);
			}
		} else if (err != 0) {
			break;
		}
	}

ASSERT(!free || err != 0 || ioerr ||
	    ba.ba_phys->bt_begin == ba.ba_phys->bt_end);

/* if all blocks are free there should be no used space */
	if (ba.ba_phys->bt_begin == ba.ba_phys->bt_end) {
		if (zfs_free_leak_on_eio) {
			ba.ba_phys->bt_bytes = 0;
			ba.ba_phys->bt_comp = 0;
			ba.ba_phys->bt_uncomp = 0;
		}

ASSERT0(ba.ba_phys->bt_bytes);
		ASSERT0(ba.ba_phys->bt_comp);
		ASSERT0(ba.ba_phys->bt_uncomp);
	}

dmu_buf_rele(db, FTAG);

return (err);
}

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Editing: bptree.c

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