#include <sys/zio_compress.h>
#include <sys/dsl_scan.h>
+/*
+ * Enable/disable prefetching of dedup-ed blocks which are going to be freed.
+ */
+int zfs_dedup_prefetch = 1;
+
static const ddt_ops_t *ddt_ops[DDT_TYPES] = {
&ddt_zap_ops,
};
void
ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg)
{
+ int d;
ASSERT(txg != 0);
- for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+ for (d = 0; d < SPA_DVAS_PER_BP; d++)
bp->blk_dva[d] = ddp->ddp_dva[d];
BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth);
}
void
ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp)
{
+ int d;
ASSERT(ddp->ddp_phys_birth == 0);
- for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+ for (d = 0; d < SPA_DVAS_PER_BP; d++)
ddp->ddp_dva[d] = bp->blk_dva[d];
ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp);
}
ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp)
{
ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys;
+ int p;
- for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+ for (p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) &&
BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth)
return (ddp);
ddt_phys_total_refcnt(const ddt_entry_t *dde)
{
uint64_t refcnt = 0;
+ int p;
- for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++)
+ for (p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++)
refcnt += dde->dde_phys[p].ddp_refcnt;
return (refcnt);
ddt_key_t *ddk = &dde->dde_key;
uint64_t lsize = DDK_GET_LSIZE(ddk);
uint64_t psize = DDK_GET_PSIZE(ddk);
+ int p, d;
bzero(dds, sizeof (*dds));
- for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+ for (p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
uint64_t dsize = 0;
uint64_t refcnt = ddp->ddp_refcnt;
if (ddp->ddp_phys_birth == 0)
continue;
- for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+ for (d = 0; d < SPA_DVAS_PER_BP; d++)
dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]);
dds->dds_blocks += 1;
void
ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src)
{
- for (int h = 0; h < 64; h++)
+ int h;
+
+ for (h = 0; h < 64; h++)
ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0);
}
void
ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh)
{
+ int h;
+
bzero(dds, sizeof (*dds));
- for (int h = 0; h < 64; h++)
+ for (h = 0; h < 64; h++)
ddt_stat_add(dds, &ddh->ddh_stat[h], 0);
}
void
ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo_total)
{
+ enum zio_checksum c;
+ enum ddt_type type;
+ enum ddt_class class;
+
/* Sum the statistics we cached in ddt_object_sync(). */
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
ddt_t *ddt = spa->spa_ddt[c];
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES;
+ for (type = 0; type < DDT_TYPES; type++) {
+ for (class = 0; class < DDT_CLASSES;
class++) {
ddt_object_t *ddo =
&ddt->ddt_object_stats[type][class];
if (ddo_total->ddo_count != 0) {
ddo_total->ddo_dspace /= ddo_total->ddo_count;
ddo_total->ddo_mspace /= ddo_total->ddo_count;
- } else {
- ASSERT(ddo_total->ddo_dspace == 0);
- ASSERT(ddo_total->ddo_mspace == 0);
}
}
void
ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh)
{
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+ enum zio_checksum c;
+ enum ddt_type type;
+ enum ddt_class class;
+
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
ddt_t *ddt = spa->spa_ddt[c];
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES;
+ for (type = 0; type < DDT_TYPES; type++) {
+ for (class = 0; class < DDT_CLASSES;
class++) {
ddt_histogram_add(ddh,
&ddt->ddt_histogram_cache[type][class]);
uint64_t ditto = spa->spa_dedup_ditto;
int total_copies = 0;
int desired_copies = 0;
+ int p;
- for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+ for (p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
ddt_phys_t *ddp = &dde->dde_phys[p];
zio_t *zio = dde->dde_lead_zio[p];
uint64_t refcnt = ddp->ddp_refcnt; /* committed refs */
ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO];
dva_t *dva = ddp->ddp_dva;
int copies = 0 - DVA_GET_GANG(dva);
+ int d;
- for (int d = 0; d < SPA_DVAS_PER_BP; d++, dva++)
+ for (d = 0; d < SPA_DVAS_PER_BP; d++, dva++)
if (DVA_IS_VALID(dva))
copies++;
static void
ddt_free(ddt_entry_t *dde)
{
+ int p;
+
ASSERT(!dde->dde_loading);
- for (int p = 0; p < DDT_PHYS_TYPES; p++)
+ for (p = 0; p < DDT_PHYS_TYPES; p++)
ASSERT(dde->dde_lead_zio[p] == NULL);
if (dde->dde_repair_data != NULL)
{
ddt_t *ddt;
ddt_entry_t dde;
+ enum ddt_type type;
+ enum ddt_class class;
- if (!BP_GET_DEDUP(bp))
+ if (!zfs_dedup_prefetch || bp == NULL || !BP_GET_DEDUP(bp))
return;
/*
- * We remove the DDT once it's empty and only prefetch dedup blocks
- * when there are entries in the DDT. Thus no locking is required
- * as the DDT can't disappear on us.
+ * We only remove the DDT once all tables are empty and only
+ * prefetch dedup blocks when there are entries in the DDT.
+ * Thus no locking is required as the DDT can't disappear on us.
*/
ddt = ddt_select(spa, bp);
ddt_key_fill(&dde.dde_key, bp);
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+ for (type = 0; type < DDT_TYPES; type++) {
+ for (class = 0; class < DDT_CLASSES; class++) {
ddt_object_prefetch(ddt, type, class, &dde);
}
}
const ddt_entry_t *dde2 = x2;
const uint64_t *u1 = (const uint64_t *)&dde1->dde_key;
const uint64_t *u2 = (const uint64_t *)&dde2->dde_key;
+ int i;
- for (int i = 0; i < DDT_KEY_WORDS; i++) {
+ for (i = 0; i < DDT_KEY_WORDS; i++) {
if (u1[i] < u2[i])
return (-1);
if (u1[i] > u2[i])
void
ddt_create(spa_t *spa)
{
+ enum zio_checksum c;
+
spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM;
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++)
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++)
spa->spa_ddt[c] = ddt_table_alloc(spa, c);
}
int
ddt_load(spa_t *spa)
{
+ enum zio_checksum c;
+ enum ddt_type type;
+ enum ddt_class class;
int error;
ddt_create(spa);
if (error)
return (error == ENOENT ? 0 : error);
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
ddt_t *ddt = spa->spa_ddt[c];
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES;
+ for (type = 0; type < DDT_TYPES; type++) {
+ for (class = 0; class < DDT_CLASSES;
class++) {
error = ddt_object_load(ddt, type, class);
if (error != 0 && error != ENOENT)
void
ddt_unload(spa_t *spa)
{
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+ enum zio_checksum c;
+
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
if (spa->spa_ddt[c]) {
ddt_table_free(spa->spa_ddt[c]);
spa->spa_ddt[c] = NULL;
{
ddt_t *ddt;
ddt_entry_t dde;
+ enum ddt_type type;
+ enum ddt_class class;
if (!BP_GET_DEDUP(bp))
return (B_FALSE);
ddt_key_fill(&dde.dde_key, bp);
- for (enum ddt_type type = 0; type < DDT_TYPES; type++)
- for (enum ddt_class class = 0; class <= max_class; class++)
+ for (type = 0; type < DDT_TYPES; type++)
+ for (class = 0; class <= max_class; class++)
if (ddt_object_lookup(ddt, type, class, &dde) == 0)
return (B_TRUE);
{
ddt_key_t ddk;
ddt_entry_t *dde;
+ enum ddt_type type;
+ enum ddt_class class;
ddt_key_fill(&ddk, bp);
dde = ddt_alloc(&ddk);
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+ for (type = 0; type < DDT_TYPES; type++) {
+ for (class = 0; class < DDT_CLASSES; class++) {
/*
* We can only do repair if there are multiple copies
* of the block. For anything in the UNIQUE class,
ddt_key_t *rddk = &rdde->dde_key;
zio_t *zio;
blkptr_t blk;
+ int p;
zio = zio_null(rio, rio->io_spa, NULL,
ddt_repair_entry_done, rdde, rio->io_flags);
- for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) {
+ for (p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) {
if (ddp->ddp_phys_birth == 0 ||
ddp->ddp_phys_birth != rddp->ddp_phys_birth ||
bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva)))
enum ddt_class oclass = dde->dde_class;
enum ddt_class nclass;
uint64_t total_refcnt = 0;
+ int p;
ASSERT(dde->dde_loaded);
ASSERT(!dde->dde_loading);
- for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+ for (p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
ASSERT(dde->dde_lead_zio[p] == NULL);
ASSERT((int64_t)ddp->ddp_refcnt >= 0);
if (ddp->ddp_phys_birth == 0) {
spa_t *spa = ddt->ddt_spa;
ddt_entry_t *dde;
void *cookie = NULL;
+ enum ddt_type type;
+ enum ddt_class class;
if (avl_numnodes(&ddt->ddt_tree) == 0)
return;
ddt_free(dde);
}
- for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
- for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
- if (!ddt_object_exists(ddt, type, class))
- continue;
- ddt_object_sync(ddt, type, class, tx);
- if (ddt_object_count(ddt, type, class) == 0)
+ for (type = 0; type < DDT_TYPES; type++) {
+ uint64_t count = 0;
+ for (class = 0; class < DDT_CLASSES; class++) {
+ if (ddt_object_exists(ddt, type, class)) {
+ ddt_object_sync(ddt, type, class, tx);
+ count += ddt_object_count(ddt, type, class);
+ }
+ }
+ for (class = 0; class < DDT_CLASSES; class++) {
+ if (count == 0 && ddt_object_exists(ddt, type, class))
ddt_object_destroy(ddt, type, class, tx);
}
}
dmu_tx_t *tx;
zio_t *rio = zio_root(spa, NULL, NULL,
ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
+ enum zio_checksum c;
ASSERT(spa_syncing_txg(spa) == txg);
tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
- for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+ for (c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
ddt_t *ddt = spa->spa_ddt[c];
if (ddt == NULL)
continue;
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