* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/bplist.h>
#include <sys/zfs_context.h>
-static int
-bplist_hold(bplist_t *bpl)
-{
- ASSERT(MUTEX_HELD(&bpl->bpl_lock));
- if (bpl->bpl_dbuf == NULL) {
- int err = dmu_bonus_hold(bpl->bpl_mos,
- bpl->bpl_object, bpl, &bpl->bpl_dbuf);
- if (err)
- return (err);
- bpl->bpl_phys = bpl->bpl_dbuf->db_data;
- }
- return (0);
-}
-
-uint64_t
-bplist_create(objset_t *mos, int blocksize, dmu_tx_t *tx)
-{
- int size;
-
- size = spa_version(dmu_objset_spa(mos)) < SPA_VERSION_BPLIST_ACCOUNT ?
- BPLIST_SIZE_V0 : sizeof (bplist_phys_t);
-
- return (dmu_object_alloc(mos, DMU_OT_BPLIST, blocksize,
- DMU_OT_BPLIST_HDR, size, tx));
-}
void
-bplist_destroy(objset_t *mos, uint64_t object, dmu_tx_t *tx)
+bplist_create(bplist_t *bpl)
{
- VERIFY(dmu_object_free(mos, object, tx) == 0);
-}
-
-int
-bplist_open(bplist_t *bpl, objset_t *mos, uint64_t object)
-{
- dmu_object_info_t doi;
- int err;
-
- err = dmu_object_info(mos, object, &doi);
- if (err)
- return (err);
-
- mutex_enter(&bpl->bpl_lock);
-
- ASSERT(bpl->bpl_dbuf == NULL);
- ASSERT(bpl->bpl_phys == NULL);
- ASSERT(bpl->bpl_cached_dbuf == NULL);
- ASSERT(bpl->bpl_queue == NULL);
- ASSERT(object != 0);
- ASSERT3U(doi.doi_type, ==, DMU_OT_BPLIST);
- ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_BPLIST_HDR);
-
- bpl->bpl_mos = mos;
- bpl->bpl_object = object;
- bpl->bpl_blockshift = highbit(doi.doi_data_block_size - 1);
- bpl->bpl_bpshift = bpl->bpl_blockshift - SPA_BLKPTRSHIFT;
- bpl->bpl_havecomp = (doi.doi_bonus_size == sizeof (bplist_phys_t));
-
- mutex_exit(&bpl->bpl_lock);
- return (0);
+ mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL);
+ list_create(&bpl->bpl_list, sizeof (bplist_entry_t),
+ offsetof(bplist_entry_t, bpe_node));
}
void
-bplist_close(bplist_t *bpl)
-{
- mutex_enter(&bpl->bpl_lock);
-
- ASSERT(bpl->bpl_queue == NULL);
-
- if (bpl->bpl_cached_dbuf) {
- dmu_buf_rele(bpl->bpl_cached_dbuf, bpl);
- bpl->bpl_cached_dbuf = NULL;
- }
- if (bpl->bpl_dbuf) {
- dmu_buf_rele(bpl->bpl_dbuf, bpl);
- bpl->bpl_dbuf = NULL;
- bpl->bpl_phys = NULL;
- }
-
- mutex_exit(&bpl->bpl_lock);
-}
-
-boolean_t
-bplist_empty(bplist_t *bpl)
-{
- boolean_t rv;
-
- if (bpl->bpl_object == 0)
- return (B_TRUE);
-
- mutex_enter(&bpl->bpl_lock);
- VERIFY(0 == bplist_hold(bpl)); /* XXX */
- rv = (bpl->bpl_phys->bpl_entries == 0);
- mutex_exit(&bpl->bpl_lock);
-
- return (rv);
-}
-
-static int
-bplist_cache(bplist_t *bpl, uint64_t blkid)
-{
- int err = 0;
-
- if (bpl->bpl_cached_dbuf == NULL ||
- bpl->bpl_cached_dbuf->db_offset != (blkid << bpl->bpl_blockshift)) {
- if (bpl->bpl_cached_dbuf != NULL)
- dmu_buf_rele(bpl->bpl_cached_dbuf, bpl);
- err = dmu_buf_hold(bpl->bpl_mos,
- bpl->bpl_object, blkid << bpl->bpl_blockshift,
- bpl, &bpl->bpl_cached_dbuf);
- ASSERT(err || bpl->bpl_cached_dbuf->db_size ==
- 1ULL << bpl->bpl_blockshift);
- }
- return (err);
-}
-
-int
-bplist_iterate(bplist_t *bpl, uint64_t *itorp, blkptr_t *bp)
-{
- uint64_t blk, off;
- blkptr_t *bparray;
- int err;
-
- mutex_enter(&bpl->bpl_lock);
-
- err = bplist_hold(bpl);
- if (err) {
- mutex_exit(&bpl->bpl_lock);
- return (err);
- }
-
- if (*itorp >= bpl->bpl_phys->bpl_entries) {
- mutex_exit(&bpl->bpl_lock);
- return (ENOENT);
- }
-
- blk = *itorp >> bpl->bpl_bpshift;
- off = P2PHASE(*itorp, 1ULL << bpl->bpl_bpshift);
-
- err = bplist_cache(bpl, blk);
- if (err) {
- mutex_exit(&bpl->bpl_lock);
- return (err);
- }
-
- bparray = bpl->bpl_cached_dbuf->db_data;
- *bp = bparray[off];
- (*itorp)++;
- mutex_exit(&bpl->bpl_lock);
- return (0);
-}
-
-int
-bplist_enqueue(bplist_t *bpl, const blkptr_t *bp, dmu_tx_t *tx)
+bplist_destroy(bplist_t *bpl)
{
- uint64_t blk, off;
- blkptr_t *bparray;
- int err;
-
- ASSERT(!BP_IS_HOLE(bp));
- mutex_enter(&bpl->bpl_lock);
- err = bplist_hold(bpl);
- if (err)
- return (err);
-
- blk = bpl->bpl_phys->bpl_entries >> bpl->bpl_bpshift;
- off = P2PHASE(bpl->bpl_phys->bpl_entries, 1ULL << bpl->bpl_bpshift);
-
- err = bplist_cache(bpl, blk);
- if (err) {
- mutex_exit(&bpl->bpl_lock);
- return (err);
- }
-
- dmu_buf_will_dirty(bpl->bpl_cached_dbuf, tx);
- bparray = bpl->bpl_cached_dbuf->db_data;
- bparray[off] = *bp;
-
- /* We never need the fill count. */
- bparray[off].blk_fill = 0;
-
- /* The bplist will compress better if we can leave off the checksum */
- bzero(&bparray[off].blk_cksum, sizeof (bparray[off].blk_cksum));
-
- dmu_buf_will_dirty(bpl->bpl_dbuf, tx);
- bpl->bpl_phys->bpl_entries++;
- bpl->bpl_phys->bpl_bytes +=
- bp_get_dasize(dmu_objset_spa(bpl->bpl_mos), bp);
- if (bpl->bpl_havecomp) {
- bpl->bpl_phys->bpl_comp += BP_GET_PSIZE(bp);
- bpl->bpl_phys->bpl_uncomp += BP_GET_UCSIZE(bp);
- }
- mutex_exit(&bpl->bpl_lock);
-
- return (0);
+ list_destroy(&bpl->bpl_list);
+ mutex_destroy(&bpl->bpl_lock);
}
-/*
- * Deferred entry; will be written later by bplist_sync().
- */
void
-bplist_enqueue_deferred(bplist_t *bpl, const blkptr_t *bp)
+bplist_append(bplist_t *bpl, const blkptr_t *bp)
{
- bplist_q_t *bpq = kmem_alloc(sizeof (*bpq), KM_SLEEP);
+ bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP);
- ASSERT(!BP_IS_HOLE(bp));
mutex_enter(&bpl->bpl_lock);
- bpq->bpq_blk = *bp;
- bpq->bpq_next = bpl->bpl_queue;
- bpl->bpl_queue = bpq;
+ bpe->bpe_blk = *bp;
+ list_insert_tail(&bpl->bpl_list, bpe);
mutex_exit(&bpl->bpl_lock);
}
void
-bplist_sync(bplist_t *bpl, dmu_tx_t *tx)
+bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx)
{
- bplist_q_t *bpq;
+ bplist_entry_t *bpe;
mutex_enter(&bpl->bpl_lock);
- while ((bpq = bpl->bpl_queue) != NULL) {
- bpl->bpl_queue = bpq->bpq_next;
+ while (bpe = list_head(&bpl->bpl_list)) {
+ list_remove(&bpl->bpl_list, bpe);
mutex_exit(&bpl->bpl_lock);
- VERIFY(0 == bplist_enqueue(bpl, &bpq->bpq_blk, tx));
- kmem_free(bpq, sizeof (*bpq));
+ func(arg, &bpe->bpe_blk, tx);
+ kmem_free(bpe, sizeof (*bpe));
mutex_enter(&bpl->bpl_lock);
}
mutex_exit(&bpl->bpl_lock);
}
-
-void
-bplist_vacate(bplist_t *bpl, dmu_tx_t *tx)
-{
- mutex_enter(&bpl->bpl_lock);
- ASSERT3P(bpl->bpl_queue, ==, NULL);
- VERIFY(0 == bplist_hold(bpl));
- dmu_buf_will_dirty(bpl->bpl_dbuf, tx);
- VERIFY(0 == dmu_free_range(bpl->bpl_mos,
- bpl->bpl_object, 0, -1ULL, tx));
- bpl->bpl_phys->bpl_entries = 0;
- bpl->bpl_phys->bpl_bytes = 0;
- if (bpl->bpl_havecomp) {
- bpl->bpl_phys->bpl_comp = 0;
- bpl->bpl_phys->bpl_uncomp = 0;
- }
- mutex_exit(&bpl->bpl_lock);
-}
-
-int
-bplist_space(bplist_t *bpl, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
-{
- int err;
-
- mutex_enter(&bpl->bpl_lock);
-
- err = bplist_hold(bpl);
- if (err) {
- mutex_exit(&bpl->bpl_lock);
- return (err);
- }
-
- *usedp = bpl->bpl_phys->bpl_bytes;
- if (bpl->bpl_havecomp) {
- *compp = bpl->bpl_phys->bpl_comp;
- *uncompp = bpl->bpl_phys->bpl_uncomp;
- }
- mutex_exit(&bpl->bpl_lock);
-
- if (!bpl->bpl_havecomp) {
- uint64_t itor = 0, comp = 0, uncomp = 0;
- blkptr_t bp;
-
- while ((err = bplist_iterate(bpl, &itor, &bp)) == 0) {
- comp += BP_GET_PSIZE(&bp);
- uncomp += BP_GET_UCSIZE(&bp);
- }
- if (err == ENOENT)
- err = 0;
- *compp = comp;
- *uncompp = uncomp;
- }
-
- return (err);
-}
-
-/*
- * Return (in *dasizep) the amount of space on the deadlist which is:
- * mintxg < blk_birth <= maxtxg
- */
-int
-bplist_space_birthrange(bplist_t *bpl, uint64_t mintxg, uint64_t maxtxg,
- uint64_t *dasizep)
-{
- uint64_t size = 0;
- uint64_t itor = 0;
- blkptr_t bp;
- int err;
-
- /*
- * As an optimization, if they want the whole txg range, just
- * get bpl_bytes rather than iterating over the bps.
- */
- if (mintxg < TXG_INITIAL && maxtxg == UINT64_MAX) {
- mutex_enter(&bpl->bpl_lock);
- err = bplist_hold(bpl);
- if (err == 0)
- *dasizep = bpl->bpl_phys->bpl_bytes;
- mutex_exit(&bpl->bpl_lock);
- return (err);
- }
-
- while ((err = bplist_iterate(bpl, &itor, &bp)) == 0) {
- if (bp.blk_birth > mintxg && bp.blk_birth <= maxtxg) {
- size +=
- bp_get_dasize(dmu_objset_spa(bpl->bpl_mos), &bp);
- }
- }
- if (err == ENOENT)
- err = 0;
- *dasizep = size;
- return (err);
-}
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