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4171 clean up spa_feature_*() interfaces
4172 implement extensible_dataset feature for use by other zpool features
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>

*** 25,34 **** --- 25,36 ---- #include <sys/dmu.h> #include <sys/dmu_objset.h> #include <sys/dmu_tx.h> #include <sys/dnode.h> + #include <sys/zap.h> + #include <sys/zfeature.h> uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) {
*** 192,197 **** --- 194,250 ---- (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg); *objectp = offset >> DNODE_SHIFT; return (error); + } + + /* + * Turn this object from old_type into DMU_OTN_ZAP_METADATA, and bump the + * refcount on SPA_FEATURE_EXTENSIBLE_DATASET. + * + * Only for use from syncing context, on MOS objects. + */ + void + dmu_object_zapify(objset_t *mos, uint64_t object, dmu_object_type_t old_type, + dmu_tx_t *tx) + { + dnode_t *dn; + + ASSERT(dmu_tx_is_syncing(tx)); + + VERIFY0(dnode_hold(mos, object, FTAG, &dn)); + if (dn->dn_type == DMU_OTN_ZAP_METADATA) { + dnode_rele(dn, FTAG); + return; + } + ASSERT3U(dn->dn_type, ==, old_type); + ASSERT0(dn->dn_maxblkid); + dn->dn_next_type[tx->tx_txg & TXG_MASK] = dn->dn_type = + DMU_OTN_ZAP_METADATA; + dnode_setdirty(dn, tx); + dnode_rele(dn, FTAG); + + mzap_create_impl(mos, object, 0, 0, tx); + + spa_feature_incr(dmu_objset_spa(mos), + SPA_FEATURE_EXTENSIBLE_DATASET, tx); + } + + void + dmu_object_free_zapified(objset_t *mos, uint64_t object, dmu_tx_t *tx) + { + dnode_t *dn; + dmu_object_type_t t; + + ASSERT(dmu_tx_is_syncing(tx)); + + VERIFY0(dnode_hold(mos, object, FTAG, &dn)); + t = dn->dn_type; + dnode_rele(dn, FTAG); + + if (t == DMU_OTN_ZAP_METADATA) { + spa_feature_decr(dmu_objset_spa(mos), + SPA_FEATURE_EXTENSIBLE_DATASET, tx); + } + VERIFY0(dmu_object_free(mos, object, tx)); }